ios 手势使用

手势的分类

(一) 手势分类
state 状态 (UIGestureRecognizerStateBegan Change ended)不同状态
view当前被点击的View

• tap 轻触
  • tap.numberOfTapsRequired = 2 连续点击次数
  • tap.numberOfTouchesRequired = 2 手指的个数
• swipe 轻扫
  direction = directionLeft | directionRight 但是 这会改变direction的值,所以一般是手动添加多个
• pan 拖拽
  CGPoint panPoint = [ pan translationInView : pan.view ]
• rotate 旋转
  rotation 角度 每一次的调度变化都会累加的
• pinch 捏合
  scale 放大比例 每一缩放都会累加
• longPress 长按
  • minimumPressDuration 长按多长时间触发
  • allowableMovement 误差值
  • if (longPress . state == UIGestureRecognizerStateBegan ){ //长按开始 执行 } 分状态执行方法

---

拖拽简单使用

@interface ViewController ()
@property (weak, nonatomic) IBOutlet UIView *purpleView;
@property (weak, nonatomic) IBOutlet UIImageView *imageView;

@end

@implementation ViewController

-(void)viewDidLoad {
[super viewDidLoad];

_imageView.userInteractionEnabled = YES;
_imageView.multipleTouchEnabled = YES;

// 轻触

// 1. 实例化手势识别对象
UIPanGestureRecognizer *pan = [[UIPanGestureRecognizer alloc] initWithTarget:self action:@selector(pan:)];


[_imageView addGestureRecognizer:pan];

}

// 3. 实现监听方法
-(void)pan:(UIPanGestureRecognizer *)pan {

CGPoint translatePoint = [pan translationInView:pan.view];

// 让view进行移动
pan.view.transform = CGAffineTransformTranslate(pan.view.transform,translatePoint.x, translatePoint.y);


[pan setTranslation:CGPointZero inView:pan.view];

}

@end

---

旋转的简单使用

@interface ViewController ()
@property (weak, nonatomic) IBOutlet UIView *purpleView;
@property (weak, nonatomic) IBOutlet UIImageView *imageView;

@end

@implementation ViewController

-(void)viewDidLoad {
[super viewDidLoad];

_imageView.userInteractionEnabled = YES;
_imageView.multipleTouchEnabled = YES;

// 轻触

// 1. 实例化手势识别对象
UIRotationGestureRecognizer *rotate = [[UIRotationGestureRecognizer alloc] initWithTarget:self action:@selector(rotate:)];


[_imageView addGestureRecognizer:rotate];

}

// 3. 实现监听方法
-(void)rotate:(UIRotationGestureRecognizer *)rotate {

NSLog(@"------ %f", rotate.rotation);


// 如果手指头停止旋转, 当再次旋转的时候 就会从0 开始

// rotate.view.transform = CGAffineTransformMakeRotation(rotate.rotation);

rotate.view.transform = CGAffineTransformRotate(rotate.view.transform, rotate.rotation);

// 每一次旋转之后, 旋转的角度都从0开始计算
rotate.rotation = 0;

}

@end

---

其他手势都是类似步骤,根据上面的关键字都可以提示的.