UIGestureRecognizer手勢(shì)操作

2019-11-14 18:17:51

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供稿：網(wǎng)友

UIGestureRecognizer類(lèi),用來(lái)檢測(cè),識(shí)別用戶(hù)使用設(shè)備時(shí)所用的手勢(shì),定義了所有手勢(shì)的基本行為.以下是UIGestureRecognizer子類(lèi),喲關(guān)于處理具體的用戶(hù)手勢(shì)行為。

單擊手勢(shì)

單擊手勢(shì)UITapGestureRecognizerUITapGestureRecognizer *singleTap=[[UITapGestureRecognizer alloc]initWithTarget:self action:@selector(singleTap:)];    [self.view addGestureRecognizer:singleTap];//單擊事件-(void)singleTap:(UITapGestureRecognizer *)tapgestrue{    NSLog(@"單擊");}

雙擊手勢(shì)

UITapGestureRecognizerUITapGestureRecognizer *doubleTap=[[UITapGestureRecognizer alloc]initWithTarget:self action:@selector(doubleTap:)];    doubleTap.numberOfTapsRequired=2;    [self.view addGestureRecognizer:doubleTap];    //區(qū)別單擊雙擊手勢(shì)    [singleTap requireGestureRecognizerToFail:doubleTap];//雙擊點(diǎn)擊事件-(void)doubleTap:(UITapGestureRecognizer *)taggestrue{    NSLog(@"雙擊");}

輕掃手勢(shì)

UISwipeGestureRecognizer *swipeGesture=[[UISwipeGestureRecognizer alloc]initWithTarget:self action:@selector(swipe:)];    //設(shè)置輕掃方向,默認(rèn)向右    swipeGesture.direction=UISwipeGestureRecognizerDirectionDown;    [self.view addGestureRecognizer:swipeGesture];//輕掃事件-(void)swipe:(UISwipeGestureRecognizer *)swipeGesture{    NSLog(@"輕掃手勢(shì)");}

//平移

UIPanGestureRecognizer *panGesture=[[UIPanGestureRecognizer alloc]initWithTarget:self action:@selector(pan:)];    [self.view addGestureRecognizer:panGesture];   //平移事件-(void)pan:(UIPanGestureRecognizer *)pan{    CGPoint point=[pan locationInView:self.view];    NSLog(@"%@",NSStringFromCGPoint(point));}

//長(zhǎng)按手勢(shì)

 UILongPRessGestureRecognizer *longPressGesture=[[UILongPressGestureRecognizer alloc]initWithTarget:self action:@selector(longPress:)];    longPressGesture.minimumPressDuration=2;    [self.view addGestureRecognizer:longPressGesture];//長(zhǎng)按手勢(shì)事件-(void)longPress:(UILongPressGestureRecognizer *)longPress{    //長(zhǎng)按離開(kāi)時(shí)一會(huì)調(diào)用一次,所以需要設(shè)置手勢(shì)狀態(tài)    if(longPress.state==UIGestureRecognizerStateEnded)    {        return;    }    NSLog(@"長(zhǎng)按超過(guò)兩秒");}

//旋轉(zhuǎn)手勢(shì)

UIRotationGestureRecognizer *rotation=[[UIRotationGestureRecognizer alloc]initWithTarget:self action:@selector(rotation:)];    [self.view addGestureRecognizer:rotation];//旋轉(zhuǎn)事件-(void)rotation:(UIRotationGestureRecognizer *)rotation{    //根據(jù)旋轉(zhuǎn)的弧度獲得角度    float degree=rotation.rotation*(180/M_PI);    NSLog(@"%f",degree);}