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 <UIKit/UIKit.h> @interface LongPressGestureRecognizer : UIGestureRecognizer @end
LongPressGestuRecognizer.m:
#import "LongPressGestureRecognizer.h" #import <UIKit/UIGestureRecognizerSubclass.h> #import <time.h> 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 <UIKit/UIKit.h> @interface DXWViewController : UIViewController<UIGestureRecognizerDelegate> @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"); } @end
3.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
本文转蓬莱仙羽51CTO博客，原文链接：http://blog.51cto.com/dingxiaowei/1366409，如需转载请自行联系原作者
