UIPanGestureRecognizer类——为view添加手势

#import <UIKit/UIKit.h>@interface TestGestureRecognizerViewController : UIViewController {    UIView *aView;}@property(nonatomic,retain)IBOutlet UIView *aView;@end///////////////////////////////////////////////////////////////////////////////////////////////#import "TestGestureRecognizerViewController.h"#import <QuartzCore/QuartzCore.h>//导入框架@implementation TestGestureRecognizerViewController@synthesize aView;-(void)handelPan:(UIPanGestureRecognizer*)gestureRecognizer{    //获取平移手势对象在self.view的位置点，并将这个点作为self.aView的center,这样就实现了拖动的效果    CGPoint curPoint = [gestureRecognizer locationInView:self.view];    [self.aView setCenter:curPoint];}-(void)handelTap:(UITapGestureRecognizer *)gestureRecognizer{    NSLog(@"%s",__FUNCTION__);    [NSRunLoop cancelPreviousPerformRequestsWithTarget:self];//双击事件取消延时}//单击方法-(void)handelSingleTap:(UITapGestureRecognizer*)gestureRecognizer{    NSLog(@"%s",__FUNCTION__);    [self performSelector:@selector(singleTap:) withObject:nil afterDelay:0.2];}-(void)singleTap:(id)sender{    NSLog(@"%s",__FUNCTION__);}- (void)viewDidLoad {    [super viewDidLoad];    //创建一个平移手势对象，该对象可以调用handelPan：方法    UIPanGestureRecognizer *panGes = [[UIPanGestureRecognizer alloc] initWithTarget:self action:@selector(handelPan:)];    [self.aView addGestureRecognizer:panGes];    [panGes release];    //创建一个点击手势对象，该对象可以调用handelTap：方法    UITapGestureRecognizer *tapGes = [[UITapGestureRecognizer alloc] initWithTarget:self action:@selector(handelTap:)];    [self.view addGestureRecognizer:tapGes];    [tapGes release];    [tapGes setNumberOfTouchesRequired:1];//触摸点个数    [tapGes setNumberOfTapsRequired:2];//点击次数    //创建一个点击手势对象，该对象可以调用handelSingleTap：方法    UITapGestureRecognizer *singleTap = [[UITapGestureRecognizer alloc] initWithTarget:self action:@selector(handelSingleTap:)];    [self.view addGestureRecognizer:singleTap];    [singleTap release];    [singleTap setNumberOfTouchesRequired:1];//触摸点个数    [singleTap setNumberOfTapsRequired:1];//点击次数}- (void)dealloc {    [super dealloc];}@end