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[IOS]自定义长触屏事件
写一个Demo来自定义一个长触屏事件,自定义长按手势。
实现步骤：
1.创建一个自定义手势类，命名为LongPressGestureRecognizer,在创建的时候继承UIGestureRecognizer
LongPressGestuRecognizer.h:
#import@interface LongPressGestureRecognizer : UIGestureRecognizer @end
LongPressGestuRecognizer.m:
#import "LongPressGestureRecognizer.h" #import#import NSInteger timer1; NSInteger timer2; @implementation LongPressGestureRecognizer -(void)touchesBegan:(NSSet *)touches withEvent:(UIEvent *)event { [super touchesBegan:touches withEvent:event]; NSDate *nowDate = [NSDate date]; NSDateFormatter *dateformatter = [[NSDateFormatter alloc] init]; [dateformatter setDateFormat:@"ss"]; timer1 = [[dateformatter stringFromDate:nowDate] integerValue]; [dateformatter release]; NSLog(@"%d",timer1); } -(void)touchesEnded:(NSSet *)touches withEvent:(UIEvent *)event { [super touchesEnded:touches withEvent:event]; NSDate *nowDate = [NSDate date]; NSDateFormatter *dateformatter = [[NSDateFormatter alloc] init]; [dateformatter setDateFormat:@"ss"]; [dateformatter release]; NSLog(@"%d",timer1); if ((timer2 -timer1) >= 2) { self.state = UIGestureRecognizerStateEnded; } } @end
2.修改主ViewController
ViewController.h:
#import@interface DXWViewController : UIViewController @end
ViewController.m:
#import "DXWViewController.h" #import "LongPressGestureRecognizer.h" @interface DXWViewController () @end @implementation DXWViewController - (void)viewDidLoad { [super viewDidLoad]; LongPressGestureRecognizer * longPress = [[LongPressGestureRecognizer alloc] initWithTarget:self action:@selector(LongPress:)]; [self.view addGestureRecognizer:longPress]; } -(void)LongPress:(LongPressGestureRecognizer *)my { NSLog(@"OK"); } @end3.ViewController中的触屏事件touchesBegan和自定义手势中的touchesBegan区别：
ViewController中的touchesBegan是针对整个View而言的，而自定义中的手势是要绑定到某个特定的view，只针对这个view才相应的手势事件
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