IOS中的七种手势小结
今天为大家介绍一下IOS的七种手势,手势在开发中经常用到,所以就简单通俗易懂的说下,话不多说,直接看代码:
//初始化一个UIimageView UIImageView*imageView=[[UIImageViewalloc]initWithFrame:CGRectMake(100,100,300,300)]; imageView.image=[UIImageimageNamed:@"12.jpg"]; //UIImageView的用户交互是默认关闭的,要想使他可以处理触摸事件,我们得手动打开它 [imageViewsetUserInteractionEnabled:YES]; [self.windowaddSubview:imageView]; //初始化一个视图(响应者)来承载手势 /*UIView*gestureView=[[UIViewalloc]initWithFrame:CGRectMake(100,100,100,100)]; //当前视图放置到屏幕中央 gestureView.center=self.window.center; gestureView.backgroundColor=[UIColoryellowColor]; [self.windowaddSubview:gestureView];
1、轻拍手势
//创建轻拍手势 UITapGestureRecognizer*tapGR=[[UITapGestureRecognizeralloc]initWithTarget:selfaction:@selector(tapAction:)];
1.设置触控对象,和轻拍的次数
//设置触控对象的个数(几个手指) [tapGRsetNumberOfTouchesRequired:1]; //设置轻拍次数 [tapGRsetNumberOfTapsRequired:2]; //给创建好的视图添加手势 [gestureViewaddGestureRecognizer:tapGR]; //轻拍手势的回调方法 -(void)tapAction:(UITapGestureRecognizer*)sender{ //可以根据手势得到它当前所作用的视图 UIImageView*imageView=(UIImageView*)sender.view; //得到textfieldviewWithTag此方法的返回值为UIView类型,但是UITextField为UIView的子类,父类对象不能直接指向子类对象,所以需要强制转换 UITextField*textField=(UITextField*)[self.windowviewWithTag:1000]; //回收键盘,取消第一响应者 [textFieldresignFirstResponder]; NSLog(@"我轻拍了gestureView"); }
2、捏合手势
//创建捏合手势 UIPinchGestureRecognizer*pinchGR=[[UIPinchGestureRecognizeralloc]initWithTarget:selfaction:@selector(pinchAction:)]; pinchGR.delegate=self;//可以在同一个视图上实现多个手势 //捏合手势的回调方法 -(void)pinchAction:(UIPinchGestureRecognizer*)sender{ //通过捏合手势的到缩放比率 floatscale=sender.scale; //得到该手势所作用的视图 UIView*view=sender.view; //2D仿射变换函数中的缩放函数来实现视图的放大缩小 //是在原有基础上来改变当前的视图 //函数的第一个参数:现有的视图的transform值 //第二个参数:x轴上的缩放比率 //第三个参数:y轴上的缩放比率 //是在视图最初的transform状态上改变,不管执行多少次,都是以该视图最初的transform状态为基础来改变 view.transform=CGAffineTransformMakeScale(2,2); view.transform=CGAffineTransformScale(view.transform,scale,scale); //每次捏合动作完毕之后,让此捏合值复原,使得它每次都是从100%开始缩放 sender.scale=1; }
3、旋转手势
//旋转手势 UIRotationGestureRecognizer*rotaGR=[[UIRotationGestureRecognizeralloc]initWithTarget:selfaction:@selector(rotaAction:)]; rotaGR.delegate=self; //旋转手势回调方法 -(void)rotaAction:(UIRotationGestureRecognizer*)sender{ //通过手势的到旋转角度 floatrota=sender.rotation; //得到该手势作用的视图 UIView*view=sender.view; //通过2D仿射变换函数中的旋转函数来使得当前视图旋转。 view.transform=CGAffineTransformRotate(view.transform,rota); //复原 sender.rotation=0; }
4、平移手势
//平移手势 UIPanGestureRecognizer*panGP=[[UIPanGestureRecognizeralloc]initWithTarget:selfaction:@selector(panAction:)]; //平移手势的回调方法 -(void)panAction:(UIPanGestureRecognizer*)sender{ //得到当前手势所在视图 UIView*view=sender.view; //得到我们在视图上移动的偏移量 CGPointcurrentPoint=[sendertranslationInView:view.superview]; //通过2D仿射变换函数中与位移有关的函数实现视图位置变化 view.transform=CGAffineTransformTranslate(view.transform,currentPoint.x,currentPoint.y); //复原//每次都是从00点开始 [sendersetTranslation:CGPointZeroinView:view.superview]; }
5、边缘轻扫手势
//边缘轻扫手势 UIScreenEdgePanGestureRecognizer*edgePanGR=[[UIScreenEdgePanGestureRecognizeralloc]initWithTarget:selfaction:@selector(edgePanAction:)]; edgePanGR.edges=UIRectEdgeAll; //边缘轻扫手势回调方法 -(void)edgePanAction:(UIScreenEdgePanGestureRecognizer*)sender{ NSLog(@"我成功的触发了屏幕边缘手势"); }
6、长按手势
//⑥长按手势 UILongPressGestureRecognizer*longPressPR=[[UILongPressGestureRecognizeralloc]initWithTarget:selfaction:@selector(longPressAction:)]; longPressPR.minimumPressDuration=1; //⑥长按手势的回调方法 -(void)longPressAction:(UILongPressGestureRecognizer*)sender{ if(sender.state==UIGestureRecognizerStateEnded){ UIAlertView*alertView=[[UIAlertViewalloc]initWithTitle:@"看你麻痹"message:@"不服你咬死我"delegate:selfcancelButtonTitle:@"取消"otherButtonTitles:@"确定",nil]; [alertViewshow]; } }
7、轻扫手势
//⑦轻扫手势 UISwipeGestureRecognizer*swipeGR=[[UISwipeGestureRecognizeralloc]initWithTarget:selfaction:@selector(swipeAction:)]; //⑦轻扫手势的回调方法 -(void)swipeAction:(UISwipeGestureRecognizer*)sender{ if(sender.state==UIGestureRecognizerStateEnded){ UIActionSheet*actionSheet=[[UIActionSheetalloc]initWithTitle:@"槽尼玛"delegate:selfcancelButtonTitle:@"纸张"destructiveButtonTitle:@"哈哈哈"otherButtonTitles:@"切毛毛",nil]; [actionSheetshowInView:self.window]; } }
给imageView视图添加手势
//3.给图片添加手势一个视图可以添加多种手势,但是一个手势,只能添加到一个视图上 [imageViewaddGestureRecognizer:tapGR]; [imageViewaddGestureRecognizer:pinchGR]; [imageViewaddGestureRecognizer:rotaGR]; [imageViewaddGestureRecognizer:panGR]; [imageViewaddGestureRecognizer:edgePanGR]; [imageViewaddGestureRecognizer:longPressPR]; [imageViewaddGestureRecognizer:swipeGR];
当一个视图上想要添加多种手势的时候就要用到手势的代理(重点)
pragmamark----手势的代理方法 //使得多个手势可以同时响应 -(BOOL)gestureRecognizer:(UIGestureRecognizer*)gestureRecognizershouldRecognizeSimultaneouslyWithGestureRecognizer:(UIGestureRecognizer*)otherGestureRecognizer{ //返回值为YES的时候,当执行一个手势的操作的时候,也可以执行其他手势的操作 returnYES; }
以上所述是小编给大家介绍的IOS中的七种手势小结,希望对大家有所帮助,如果大家有任何疑问请给我留言,小编会及时回复大家的。在此也非常感谢大家对毛票票网站的支持!