iOS中的各种手势

清疚 2022-08-10 00:45 240阅读 0赞

/\*\*  
 基类UIGestureRecognizer  
 UITapGestureRecognizer        Tap 点击  
 UIPanGestureRecognizer        Pan (慢速滑动，拖移)  
 UILongPressGestureRecognizer  LongPress (长按)  
 UIPinchGestureRecognizer      Pinch （捏合，两手指往内或外拨动）  
 UIRotationGestureRecognizer   Rotation (旋转)  
 UISwipeGestureRecognizer        Swipe (快速滑动，轻扫)  
 \*/  
  
\#import "ViewController.h"  
  
\#define kRandomValue (arc4random() %256 /256.0)  
@interface ViewController () <UIGestureRecognizerDelegate>  
  
@property (nonatomic,strong) UIImageView \*imageView;  
  
@end  
  
@implementation ViewController  
  
\- (void)viewDidLoad \{  
    \[super viewDidLoad\];  
    //强烈不建议往一个控件上加很多手势  
    \[self addImageView\];  
    \[self addTapGesture\];//点击手势  
    //\[self addPanGesture\];//拖移手势  
    \[self addLongPressGesture\];//长按手势  
    \[self addPinchGesture\];//捏合  
    \[self addResetButton\];//重置  
    \[self addRotationGesture\];//旋转  
    \[self addSwipeGesture\];//轻扫  
\}  
  
\-(void)addImageView\{  
    UIImage \*image=\[UIImage imageNamed:@"cloth"\];  
    self.imageView=\[\[UIImageView alloc\] initWithImage:image\];//这样写默认imageView的大小和image的大小一样  
    self.imageView.userInteractionEnabled=YES;//打开用户交互  
    self.imageView.center=self.view.center;  
    \[self.view addSubview:self.imageView\];  
\}  
  
\-(void)addTapGesture\{  
    UITapGestureRecognizer \*tap=\[\[UITapGestureRecognizer alloc\] init\];  
    //tap.numberOfTapsRequired=2;//默认为1，点击次数  
    //tap.numberOfTouchesRequired=2;//默认为1，多少根手指触摸  
    \[tap addTarget:self action:@selector(tap:)\];  
    \[self.imageView addGestureRecognizer:tap\];  
\}  
\-(void)tap:(UITapGestureRecognizer \*)tap\{  
    UIView \*view=tap.view;  
    view.superview.backgroundColor=\[UIColor colorWithRed:kRandomValue green:kRandomValue blue:kRandomValue alpha:1.0\];  
\}  
  
\-(void)addPanGesture\{  
    UIPanGestureRecognizer \*pan=\[\[UIPanGestureRecognizer alloc\] init\];  
    pan.delegate=self;  
    \[pan addTarget:self action:@selector(pan:)\];  
    \[self.imageView addGestureRecognizer:pan\];  
\}  
\-(void)pan:(UIPanGestureRecognizer \*)pan\{  
    CGPoint offset=\[pan  
                    translationInView:self.view\];  
    CGPoint center=self.imageView.center;  
    center.x+=offset.x;  
    center.y+=offset.y;  
    self.imageView.center=center;  
      
    //不让其累加  
    \[pan setTranslation:CGPointZero inView:self.view\];  
\}  
  
\-(void)addLongPressGesture\{  
    UILongPressGestureRecognizer \*longPress=\[\[UILongPressGestureRecognizer alloc \] init\];  
    \[longPress addTarget:self action:@selector(longPress:)\];  
    \[self.imageView addGestureRecognizer:longPress\];  
\}  
\-(void)longPress:(UILongPressGestureRecognizer \*)longPress\{  
    switch (longPress.state) \{  
        case UIGestureRecognizerStateBegan:  
            NSLog(@"你长按了");  
            break;  
        case UIGestureRecognizerStateEnded:  
            NSLog(@"长按结束");  
            break;  
        default:  
            break;  
    \}  
\}  
  
\-(void)addPinchGesture\{  
    UIPinchGestureRecognizer \*pinch=\[\[UIPinchGestureRecognizer alloc\] initWithTarget:self action:@selector(pinch:)\];  
    \[self.imageView addGestureRecognizer:pinch\];  
\}  
\-(void)pinch:(UIPinchGestureRecognizer \*)pinch\{  
    NSLog(@"%lf",pinch.scale);  
    //捏合  scale缩放比例  
    //transform 变换，仿射变换/矩阵变换，  
    self.imageView.transform=CGAffineTransformScale(self.imageView.transform, pinch.scale, pinch.scale);  
    //重置捏合手势比例，每次都应该相对于当前的  
    pinch.scale=1;//下次相对比例应该从1开始  
\}  
  
\-(void)addResetButton\{  
    UIButton \*button=\[UIButton buttonWithType:UIButtonTypeSystem\];  
    button.frame=CGRectMake(0, CGRectGetMaxY(self.imageView.frame)+60, 200, 40);  
    \[button setTitle:@"Reset" forState:UIControlStateNormal\];  
    \[button addTarget:self action:@selector(reset:) forControlEvents:UIControlEventTouchUpInside\];  
    \[self.view addSubview:button\];  
\}  
\-(void)reset:(id)sender\{  
    //恢复imageView的transform  
    self.imageView.transform=CGAffineTransformIdentity;  
\}  
  
\-(void)addRotationGesture\{  
    UIRotationGestureRecognizer \*rotation=\[\[UIRotationGestureRecognizer alloc\] initWithTarget:self action:@selector(rotation:)\];  
    \[self.imageView addGestureRecognizer:rotation\];  
\}  
\-(void)rotation:(UIRotationGestureRecognizer \*)rotation\{  
    NSLog(@"旋转弧度：%lf",rotation.rotation);  
    self.imageView.transform=CGAffineTransformRotate(self.imageView.transform, rotation.rotation);  
    rotation.rotation=0;//重置旋转弧度，相当于当前的从0开始  
\}  
  
\-(void)addSwipeGesture\{  
    UISwipeGestureRecognizer \*swipe=\[\[UISwipeGestureRecognizer alloc\] initWithTarget:self action:@selector(swipe:)\];  
    //swipe默认的direction为right  
    swipe.direction=UISwipeGestureRecognizerDirectionUp;  
    \[self.imageView addGestureRecognizer:swipe\];  
\}  
\-(void)swipe:(UISwipeGestureRecognizer \*)swipe\{  
    CGPoint center=self.imageView.center;  
    center.y -=50;  
    self.imageView.center=center;  
\}  
  
\#pragma mark -UIGestureRecognizerDelegate  
//是否支持多个手势  
\-(BOOL)gestureRecognizer:(UIGestureRecognizer \*)gestureRecognizer shouldRecognizeSimultaneouslyWithGestureRecognizer:(UIGestureRecognizer \*)otherGestureRecognizer\{  
    return YES;  
\}  
  
@end