CN109254823B - Method for switching multi-level nested paging view elements, memory and terminal - Google Patents
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- G06F3/048—Interaction techniques based on graphical user interfaces [GUI]
- G06F3/0487—Interaction techniques based on graphical user interfaces [GUI] using specific features provided by the input device, e.g. functions controlled by the rotation of a mouse with dual sensing arrangements, or of the nature of the input device, e.g. tap gestures based on pressure sensed by a digitiser
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- G06F3/04883—Interaction techniques based on graphical user interfaces [GUI] using specific features provided by the input device, e.g. functions controlled by the rotation of a mouse with dual sensing arrangements, or of the nature of the input device, e.g. tap gestures based on pressure sensed by a digitiser using a touch-screen or digitiser, e.g. input of commands through traced gestures for inputting data by handwriting, e.g. gesture or text
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Abstract
The invention relates to a method, a memory and a terminal for switching multi-level nested paging view elements, wherein the method comprises the following steps: associating the multi-level nested paging view elements and creating a level indicator for indicating a target level to be currently slid; monitoring a touch event of a paging view element, and calculating the vertical coordinate offset of a touch point in the touch event; and modifying the indication position of the level indicator according to the ordinate offset. According to the method, on the basis of the original system paging tool, the gesture operation is monitored, the function of the gesture operation is expanded, the target level to be slid at present is indicated by drawing the indicator on the label of the paging level, the target level paging content is slid through the gesture touch sliding operation, and the experience of a user in sliding the multi-level nested paging elements is greatly improved.
Description
Technical Field
The invention relates to the technical field of computer application, in particular to a method for switching paging view elements through multi-point touch sliding operation in multi-level nested paging view elements on a mobile terminal (android and IOS equipment), a memory and a terminal.
Background
The technical noun explains:
the view element application displays visible view elements such as characters, pictures, buttons and the like on the screen of the mobile terminal device. These things often represent some specific functionality, such as operations such as "confirm", "cancel", etc. by clicking on "button" view elements.
Paginated view elements a view element that can accommodate multiple view elements (see fig. 2, 3), different content can be slide-shown by a right-left slide of a gesture.
When a user touches the screen of the device, the mobile terminal device responds to the touch and informs the running application program displayed on the screen in the form of a touch event. The actions of the touch event are roughly classified into "press", "move", "lift", "cancel", and the like. "Press" - > "move" - > "Lift" is a standard cycle of touch events
At present, most mobile terminal equipment hardware supports the recognition of 'multi-point touch', and when a user touches an equipment screen with one finger, two fingers or even a plurality of fingers at the same time, the user can trigger events such as 'pressing down', 'moving', 'lifting up' and the like which are independent of each other aiming at each finger
The developer of the listening touch event can learn the touch event of the user in the application program through a system function (ontouch event for android and touchbesan for ios). The "press", "lift", and "cancel" actions may be triggered only once during a cycle of a finger touch event, while the "move" action may be triggered multiple times, representing feedback from the user that the finger is sliding
After a touch event is intercepted, the touch event can be selected whether to directly 'consume' the event, namely, the subsequent transmission process of the event is directly interrupted, and the touch event is not transmitted to any other place
Touch event attributes each touch event contains two attributes, "action name (action)" and "trigger coordinates (eventY )". By reading action names and starting coordinates, a developer can determine where the user is and what operation is specifically performed
Touch threshold the minimum movement distance that the system can recognize when a "move" action is triggered, i.e. the user's finger has moved a small distance across the screen of the device, which the system can recognize as a "move" action only if this distance is greater than the touch threshold. The touch threshold (TouchSlop) is a device-specific property that varies across devices of different resolutions. For a cell phone with a resolution of 1080 x 1920, 24 pixels are typical.
The coordinates are on the screen of the mobile terminal equipment, and the coordinates of any view element refer to the distance between the left upper corner of the view element, namely, the ordinate of one view element is the distance between the left side of the view element and the left side of the superior view element, and the ordinate is the distance between the upper side of the view element and the upper side of the superior view element
All system built-in pagination view elements (android is ViewPager, ios is UIScrollView) are arranged on the current mobile end system, a plurality of sub-view elements can be accommodated, and contents of different sub-view elements are switched and displayed by gesture left-right sliding:
the paging view elements are divided into a label layer and a content layer, the sliding label layer does not affect the content layer, but the sliding content layer is simultaneously connected with the sliding label layer.
In some special cases, an application may use multiple levels of nested paging views to achieve a particular need (see FIG. 4).
Although the page structure of the multi-level nested paging view is clear, it is quite inconvenient for the user to perform the sliding operation, that is, the sliding of each level of paging is independent, and only when the indicator of a certain level of paging is located at the position of the first or last tag, and then sliding to the left (when the indicator is located at the position of the first tag)/to the right (when the indicator is located at the position of the last tag), the sliding of the upper level of paging can be triggered.
Therefore, due to the large number of paging levels in the multi-level paging view element, it is troublesome to switch the tag of a certain upper level by sliding the lower levels.
Disclosure of Invention
The invention provides a method, a memory and a terminal for switching multi-level nested paging view elements, aiming at the technical problems in the prior art.
The technical scheme for solving the technical problems is as follows:
in one aspect, the present invention provides a method for switching multi-level nested paged view elements, comprising the following steps:
step 1, associating multi-level nested paging view elements and creating a level indicator for indicating a current target level to be slid;
step 2, monitoring a touch event of the paging view element, and calculating the vertical coordinate offset of a touch point in the touch event;
and 3, modifying the indication position of the hierarchical indicator according to the ordinate offset.
Further, the method of creating a hierarchy indicator comprises the steps of:
a variable currentLevel is declared and an initial value is assigned to indicate the sequence number of the current target level to be slid;
calling a canvas.
And detecting the value of the variable currentLevel, and when the value changes, changing the drawing position of the solid line according to the value of the variable currentLevel to indicate the view element level corresponding to the changed value of the variable currentLevel.
Further, the step 2 comprises:
monitoring touch events of the paging view elements, judging the number of touch points in the touch events, and executing one of the following operations according to the number of the touch points:
1) feeding back the current touch event to a target paging view element;
2) calculating the ordinate offset of a touch point in the touch event;
3) the subsequent analysis operation of the touch event is terminated.
Further, the determining the number of touch points in the touch event and performing the operation includes:
if the touch point is 1, feeding back the current touch event to the target paging view element;
if the touch point is 3, calculating the vertical coordinate offset of the touch point in the touch event;
otherwise, the subsequent analysis operation of the touch event is terminated.
Further, the feeding back the current touch event to the current paginated view element includes:
according to the value of currentLevel, obtaining an object currentViewPager of a target level paging view element by using a currentLevel method;
and feeding back the current touch event to an object currentViewPager to perform target level paging view element sliding operation.
Further, the calculating the ordinate offset of the touch point in the touch event includes:
1) judging the touch event action of the first touch point:
if the action of the touch event is "press", recording the ordinate of the action as lastEventY1 ═ eventY 1;
if the touch event is a "move," the offset between the ordinate of the current action and the last recorded ordinate, dY1 ═ eventY 1-lastEventY 1, is calculated, and the record lastEventY1 ═ eventY1 is updated with the current ordinate
If the action of the touch event is 'lift up', terminating all subsequent analysis steps for the first touch point;
2) judging the touch event action of the second touch point:
if the action of the touch event is "press", recording the ordinate of the action as lastEventY2 ═ eventY 2;
if the touch event action is "move," then calculate the offset between the ordinate of the current action and the last recorded ordinate, dY2 ═ eventY2-lastEventY2, and update the record lastEventY2 ═ eventY2 with the current ordinate;
if the action of the touch event is 'lift up', terminating all subsequent analysis steps for the second touch point;
3) judging the touch event action of a third touch point:
if the action of the touch event is "press", recording the ordinate of the action as lastEventY3 ═ eventY 3;
if the touch event action is "move," then calculate the offset between the ordinate of the current action and the last recorded ordinate, dY3 ═ eventY 3-lastEventY 3, and update the record lastEventY3 ═ eventY3 with the current ordinate;
if the touch event is a "lift-off," all subsequent analysis steps for the third touch point are terminated.
Further, in step 3, modifying the indication position of the level indicator according to the ordinate offset includes:
a) dY1, dY2 and dY3 are all larger than 0, whether the target level is the maximum value or not is judged, and if yes, the touch event is ignored; otherwise, adding one to the currentLevel value to update the position of the line of the level indicator;
b) dY1, dY2 and dY3 are all smaller than 0, whether the target level is the first level or not is judged, and if yes, the touch event is ignored; otherwise, the currentLevel value is reduced by one to update the position of the line of the level indicator;
c) and if the dY1, the dY2 and the dY3 are not simultaneously greater than 0 and not simultaneously less than 0, the condition is judged to be invalid operation, and the touch event is ignored.
In another aspect, the present invention further provides a memory, in which a computer software program for implementing the method for switching multi-level nested paged view elements is stored.
In a third aspect, the present invention further provides a terminal, which includes a display device, a processor, and the above memory.
The invention has the beneficial effects that: according to the method, on the basis of the original system paging tool, the gesture operation is monitored, the function of the gesture operation is expanded, the target level to be slid at present is indicated by drawing the indicator on the label of the paging level, the paging content of the target level is switched through the three-point gesture touch sliding operation, and the method for sliding the paging content of the target level through the single-point gesture touch is adopted, so that the experience of a user in sliding the multi-level nested paging elements is greatly improved.
Drawings
FIG. 1 is a flow chart of the method of the present invention;
FIG. 2 is a diagram illustrating page view elements with a page indicator pointing to a page 1 tag;
FIG. 3 is a diagram illustrating page view elements with a page indicator pointing to the page 2 tag;
FIG. 4 is a diagram of a multi-level nested paging view element;
FIG. 5 is a diagram of a multi-level nested paginated view element with a level indicator.
Detailed Description
The principles and features of this invention are described below in conjunction with the following drawings, which are set forth by way of illustration only and are not intended to limit the scope of the invention.
As shown in fig. 1, the present invention provides a method for switching multi-level nested paging view elements, comprising the following steps:
step 1, associating multi-level nested paging view elements and creating a level indicator for indicating a current target level to be slid;
a variable currentLevel is declared and an initial value is assigned to indicate the sequence number of the current target level to be slid;
calling a canvas.
And detecting the value of the variable currentLevel, and when the value changes, changing the drawing position of the solid line according to the value of the variable currentLevel to indicate the view element level corresponding to the changed value of the variable currentLevel.
Step 2, monitoring a touch event of the paging view element, and calculating the vertical coordinate offset of a touch point in the touch event;
monitoring touch events of the paging view elements, judging the number of touch points in the touch events, and executing one of the following operations according to the number of the touch points:
if the touch point is 1, feeding back the current touch event to the target paging view element;
according to the value of currentLevel, obtaining an object currentViewPager of a target level paging view element by using a currentLevel method;
and feeding back the current touch event to an object currentViewPager to perform target level paging view element sliding operation.
If the touch point is 3, calculating the vertical coordinate offset of the touch point in the touch event;
1) judging the touch event action of the first touch point:
if the action of the touch event is "press", recording the ordinate of the action as lastEventY1 ═ eventY 1;
if the touch event is a "move," the offset between the ordinate of the current action and the last recorded ordinate, dY1 ═ eventY 1-lastEventY 1, is calculated, and the record lastEventY1 ═ eventY1 is updated with the current ordinate
If the action of the touch event is 'lift up', terminating all subsequent analysis steps for the first touch point;
2) judging the touch event action of the second touch point:
if the action of the touch event is "press", recording the ordinate of the action as lastEventY2 ═ eventY 2;
if the touch event action is "move," then calculate the offset between the ordinate of the current action and the last recorded ordinate, dY2 ═ eventY2-lastEventY2, and update the record lastEventY2 ═ eventY2 with the current ordinate;
if the action of the touch event is 'lift up', terminating all subsequent analysis steps for the second touch point;
3) judging the touch event action of a third touch point:
if the action of the touch event is "press", recording the ordinate of the action as lastEventY3 ═ eventY 3;
if the touch event action is "move," then calculate the offset between the ordinate of the current action and the last recorded ordinate, dY3 ═ eventY 3-lastEventY 3, and update the record lastEventY3 ═ eventY3 with the current ordinate;
if the touch event is a "lift-off," all subsequent analysis steps for the third touch point are terminated.
And 3, modifying the indication position of the level indicator according to the ordinate offset, and triggering the switching of the levels of the paging view elements.
a) dY1, dY2 and dY3 are all larger than 0, whether the target level is the maximum value or not is judged, and if yes, the touch event is ignored; otherwise, adding one to the currentLevel value to update the position of the line of the level indicator;
b) dY1, dY2 and dY3 are all smaller than 0, whether the target level is the first level or not is judged, and if yes, the touch event is ignored; otherwise, the currentLevel value is reduced by one to update the position of the line of the level indicator;
c) and if the dY1, the dY2 and the dY3 are not simultaneously greater than 0 and not simultaneously less than 0, the condition is judged to be invalid operation, and the touch event is ignored.
Otherwise, the subsequent analysis operation of the touch event is terminated.
Based on the method, on the basis of the original system paging tool, the functions of the gesture operation are expanded by monitoring the gesture operation, a novel multi-level nested paging sliding tool (GesturneMulitViewPager helper) is invented, the target level to be slid at present is indicated by drawing an indicator on a label of the paging level, and the target level paging content is directly slid by three-point gesture touch sliding operation, so that the experience of a user in sliding the multi-level nested paging elements is greatly improved.
When the developer initializes the tool, an association function 'attachViewPager' of the tool needs to be called, and the multi-level nested list view elements on the application program page are associated, including all levels of paging view elements, but none is available.
Assume that there are N levels of nested paged view elements.
As shown in fig. 4, there are 3 levels, and the names of the paginated view elements of the 3 levels are respectively viewPager1, viewPager2 and viewPager3 from top to bottom
Method for indicating current target level to be slipped by using level indicator
1. Declaring a variable currentLevel, wherein the initial value is 1 and refers to the sequence number of a current target level to be slid;
2. draw a solid line to the left of the label of the paged view element of the level, calling the canvas. As shown in fig. 5, assuming that currentlevel is 1, the target level is the first level (level 1: viewPager1, level 2: viewPager2, and level 3: viewPager3), so a solid line is drawn to the left of the label layer of the first-level paginated view element (viewPager 1).
The value of the currentLevel variable is detected, and the drawing position of the line is immediately changed according to the value of the currentLevel whenever the value is changed.
Method for monitoring touch events of multi-level paging view elements on application program page and changing target level to be slid through three-point gesture operation
After the tool is associated with the multi-level nested paging view elements, touch events of the Nth level view elements can be monitored, and single-point and three-point gesture operations can be detected, and the specific method comprises the following steps:
when a touch event occurs to the associated view element, the tool monitors and analyzes the touch event.
1. Determining the number of touch event points
2. If the number of the touch points is 1, performing sliding judgment of the single-point gesture according to the step (III);
3. if the number of the touch points is 3, jumping to the step 2, and performing sliding judgment of the three-point gesture;
4. if the number of the touch points is other, terminating all subsequent judgments
5. Calculating the ordinate offset of the two-point touch event:
a) for the first touch point:
i. if the action of the touch event is "press", recording the ordinate of the action as lastEventY1 ═ eventY 1;
if the touch event action is "move", then calculate the offset between the ordinate of the current action and the last recorded ordinate, dY1 ═ eventY 1-lastEventY 1 (i.e., how much distance the triggered "move" action was moved on the ordinate relative to the last touch event action), and update the record lastEventY1 ═ eventY1 with the current ordinate;
if the action of the touch event is "lift off", then all subsequent analysis steps for the first touch point are terminated.
b) For the second touch point:
i. if the action of the touch event is "press", recording the ordinate of the action as lastEventY2 ═ eventY 2;
if the touch event action is "move", then calculate the offset between the ordinate of the current action and the last recorded ordinate, dY2 ═ eventY2-lastEventY2, and update the record lastEventY2 ═ eventY2 with the current ordinate;
if the touch event action is "lift-off", then all subsequent analysis steps for the second touch point are terminated.
c) For the third touch point:
i. if the action of the touch event is "press", recording the ordinate of the action as lastEventY3 ═ eventY 3;
if the touch event action is "move", then calculate the offset between the ordinate of the current action and the last recorded ordinate, dY3 ═ eventY 3-lastEventY 3, and update the record lastEventY3 ═ eventY3 with the current ordinate;
if the action of the touch event is "lift off", then all subsequent analysis steps for the third touch point are terminated.
6. Judging whether to trigger three-point sliding operation or not according to respective vertical coordinate offset of three points
a) dY1, dY2 and dY3 are all greater than 0
It is determined that the situation is that the three fingers of the user slide downward at the same time. This situation will change the target level of the paged view element to be slid, specifically:
determining whether the target level is already at the maximum value, i.e., determining whether currentLevel is greater than or equal to N:
i. if so, ignoring the touch event;
if not, then increment the currentLevel value by one and update the position of the hierarchy indicator bar according to step 2 of (one).
b) dY1, dY2 and dY3 are all less than 0
It is determined that the situation is that the three fingers of the user slide upward at the same time. This situation will change the target level of the paged view element to be slid, specifically:
judging whether the target level is the first level, namely judging whether currnet level is less than or equal to 1:
i. if so, the touch event is ignored
if not, then decrement the currentLevel value by one, and according to step (one)
2 update the position of the hierarchy indicator bar.
c) dY1, dY2 and dY3 are not greater than 0 nor less than 0 simultaneously
This case is determined to be an invalid operation, and this touch event is ignored.
(III) method for monitoring touch events of multi-level paging view elements on application program page and directly sliding target level through single-point gesture operation
1. According to the value of currentLevel, obtaining an object currentViewPager of a target level paging view element by using a currentLevel method;
2. the single-point gesture touch event heard in (two) is handed over directly to currentViewPager (instead of the nth level paginated view element) so that the target level paginated view element thinks it is being slid by the user (actually not).
The above description is only for the purpose of illustrating the preferred embodiments of the present invention and is not to be construed as limiting the invention, and any modifications, equivalents, improvements and the like that fall within the spirit and principle of the present invention are intended to be included therein.
Claims (8)
1. A method of switching multi-level nested paged view elements, comprising the steps of:
step 1, associating multi-level nested paging view elements and creating a level indicator for indicating a current target level to be slid;
step 2, monitoring a touch event of the paging view element, and calculating the vertical coordinate offset of a touch point in the touch event;
step 3, modifying the indication position of the hierarchical indicator according to the vertical coordinate offset;
wherein the method of creating a hierarchy indicator comprises the steps of:
a variable currentLevel is declared and an initial value is assigned to indicate the sequence number of the current target level to be slid;
calling a canvas.
And detecting the value of the variable currentLevel, and when the value changes, changing the drawing position of the solid line according to the value of the variable currentLevel to indicate the view element level corresponding to the changed value of the variable currentLevel.
2. The method according to claim 1, wherein the step 2 comprises:
monitoring touch events of the paging view elements, judging the number of touch points in the touch events, and executing one of the following operations according to the number of the touch points:
1) feeding back the current touch event to a target paging view element;
2) calculating the ordinate offset of a touch point in the touch event;
3) the subsequent analysis operation of the touch event is terminated.
3. The method according to claim 2, wherein the determining the number of touch points in the touch event is performed by:
if the touch point is 1, feeding back the current touch event to the target paging view element;
if the touch point is 3, calculating the vertical coordinate offset of the touch point in the touch event;
otherwise, the subsequent analysis operation of the touch event is terminated.
4. The method of claim 3, wherein the feeding back the current touch event to the current paginated view element comprises:
according to the value of currentLevel, obtaining an object currentViewPager of a target level paging view element by using a currentLevel method;
and feeding back the current touch event to an object currentViewPager to perform target level paging view element sliding operation.
5. The method according to claim 3, wherein the calculating the ordinate offset of the touch point in the touch event comprises:
1) judging the touch event action of the first touch point:
if the action of the touch event is "press", recording the ordinate of the action as lastEventY1 ═ eventY 1;
if the touch event is a "move," the offset between the ordinate of the current action and the last recorded ordinate, dY1 ═ eventY 1-lastEventY 1, is calculated, and the record lastEventY1 ═ eventY1 is updated with the current ordinate
If the action of the touch event is 'lift up', terminating all subsequent analysis steps for the first touch point;
2) judging the touch event action of the second touch point:
if the action of the touch event is "press", recording the ordinate of the action as lastEventY2 ═ eventY 2;
if the touch event action is "move," then calculate the offset between the ordinate of the current action and the last recorded ordinate, dY2 ═ eventY2-lastEventY2, and update the record lastEventY2 ═ eventY2 with the current ordinate;
if the action of the touch event is 'lift up', terminating all subsequent analysis steps for the second touch point;
3) judging the touch event action of a third touch point:
if the action of the touch event is "press", recording the ordinate of the action as lastEventY3 ═ eventY 3;
if the touch event action is "move," then calculate the offset between the ordinate of the current action and the last recorded ordinate, dY3 ═ eventY 3-lastEventY 3, and update the record lastEventY3 ═ eventY3 with the current ordinate;
if the touch event is a "lift-off," all subsequent analysis steps for the third touch point are terminated.
6. The method as claimed in claim 5, wherein the step 3, according to the ordinate offset, modifies the indicated position of the level indicator to trigger switching the level of the paginated view elements, and comprises:
a) dY1, dY2 and dY3 are all larger than 0, whether the target level is the maximum value or not is judged, and if yes, the touch event is ignored; otherwise, adding one to the currentLevel value to update the position of the line of the level indicator;
b) dY1, dY2 and dY3 are all smaller than 0, whether the target level is the first level or not is judged, and if yes, the touch event is ignored; otherwise, the currentLevel value is reduced by one to update the position of the line of the level indicator;
c) and if the dY1, the dY2 and the dY3 are not simultaneously greater than 0 and not simultaneously less than 0, the condition is judged to be invalid operation, and the touch event is ignored.
7. A memory having stored therein a computer software program for implementing a method of switching multi-level nested paged view elements as claimed in any one of claims 1 to 6.
8. A terminal comprising display means, a processor and a memory according to claim 7.
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| CN113396381B (en) * | 2019-02-08 | 2023-11-28 | 株式会社工程师论坛 | Tree information providing device and storage medium |
| CN110175023A (en) * | 2019-05-28 | 2019-08-27 | 四川长虹电器股份有限公司 | Method and system based on the multistage nested linkage of the UIScrollView in iOS system |
| CN113325975B (en) * | 2021-05-21 | 2023-01-20 | 翱捷科技股份有限公司 | User interface switching method and device based on LVGL |
| CN113487991B (en) * | 2021-06-22 | 2023-10-13 | 北京黑鸟科技有限公司 | Marking method, system, device and medium for flexible paging on segment code screen |
| CN113891160B (en) * | 2021-09-22 | 2024-02-13 | 百果园技术(新加坡)有限公司 | Sliding switching method and device for content card, terminal and storage medium |
| CN114356194A (en) * | 2022-03-07 | 2022-04-15 | 北京搜狐新媒体信息技术有限公司 | Method and device for processing native advertisement |
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