[IOS]自定义长触屏事件

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

写一个Demo来自定义一个长触屏事件,自定义长按手势。