The pagination control is a visible indicator used to replace the navigation bar, which facilitates direct page turnover by gestures. The most typical application is the iPhone's home screen. When there are too many icons, the page will be automatically added. At the bottom of the screen, you will see the origin, which is used only to be the current page, and will be automatically updated as the page turns.
1. Create
Copy the codeThe code is as follows:
UIPageControl* myPageControl = [[UIPageControl alloc]initWithFrame:CGRectMake(0.0, 400.0, 320.0, 0.0)];
2. Set properties
Number of pages
Copy the codeThe code is as follows:
=5;
The first page will be selected by default. If you want to select another page, you can set the currentPage property. Page index starts at 0:
Copy the codeThe code is as follows:
=3;// Current page number, fourth page
By default, even if there is only one page, the indicator will be displayed. If you want to hide the indicator with only one page, you can set the value of hideForSinglePage to YES.
Copy the codeThe code is as follows:
=YES;
If you want to not update the current indicator page until you have time to perform your operation, you can set defersCurrentPageDisPlay to YES. In this way, you must call the control's updateCurentPageDisPlay to update the current page:
Copy the codeThe code is as follows:
= YES;
[myPageControl updateCurrentPageDisplay];
3. Display controls
Copy the codeThe code is as follows:
[ addSubview:myPageControl];
4. Notification
When the user touches the paging control, a UIControlEventVakueChanged event is generated. You can use the addTarget method of the UIControl class to specify an action:
Copy the codeThe code is as follows:
-(void)pageChanged:(id)sender{
UIPageControl* control = (UIPageControl*)sender;
NSInteger page = ;
//Add the code you want to process
}
[myPageControl addTarget:self action:@selector(pageChanged:) forControlEvents:UIControlEventValueChanged];
5. A list of common attributes
Copy the codeThe code is as follows:
//Create UIPageControl
UIPageControl * page = [[UIPageControl alloc] initWithFrame:CGRectMake(0, -50, , 50)];
//Set background color
= [UIColor clearColor];
//Set the number of small circles
= 15;
//Set the color of the small circle
= [UIColor orangeColor];
//Set the color of the small circle of the current page
= [UIColor redColor];
//Get/Change the current page
= 1;
//Add click events
[page addTarget:self action:@selector(pageClick:) forControlEvents:UIControlEventValueChanged];