Solve the Click Event and UIScrollView event of uiscrollview

Solve the Click Event and UIScrollView event of uiscrollview

There are currently two methods

The first method is to use Category to extend the UIScrollView object and add a touch event. (It is not recommended that the extension be inconvenient in the future.) The Code is as follows:

@implementation UIScrollView (ExtendTouch)- (void)touchesBegan:(NSSet *)touches withEvent:(UIEvent *)event {    [[self nextResponder] touchesBegan:touches withEvent:event];    [super touchesBegan:touches withEvent:event];    UITouch *touch = [touches anyObject];    CGFloat startx = [touch locationInView:self].x;    NSLog(@"%f",startx);}-(void)touchesMoved:(NSSet *)touches withEvent:(UIEvent *)event {    [[self nextResponder] touchesMoved:touches withEvent:event];    [super touchesMoved:touches withEvent:event];}- (void)touchesEnded:(NSSet *)touches withEvent:(UIEvent *)event {    [[self nextResponder] touchesEnded:touches withEvent:event];    [super touchesEnded:touches withEvent:event];}

Second, add a gesture (recommended and easy to maintain)

// Add the point-and-click gesture listener UITapGestureRecognizer * tapGesture = [[delealloc] initWithTarget: self action: @ selector (tapUiscrollView :)]; // set the gesture attribute tapGesture. delegate = self; tapGesture. numberOfTapsRequired = 1; // set the number of clicks. The default value is 1. Note that you rarely double-click tapGesture in iOS. numberOfTouchesRequired = 1; // The hand index of the point by [self. scrllview addGestureRecognizer: tapGesture];

　　

@interface ViewController ()<UIScrollViewDelegate,UIGestureRecognizerDelegate>