UIView的点击事件与触摸手势_uiview中点击事件触发uiviewcontroller的方法-优快云博客

本文链接：https://blog.youkuaiyun.com/MarkBoo/article/details/40080887

本文介绍了如何在iOS应用中为UIView及其子类添加手势识别器，包括在init、loadView或viewDidLoad方法中设置。示例中提到了向左滑动的手势识别器用于WebView，以及长按事件的添加到搜索按钮。讨论了UIGestureRecognizer的主要子类，如UILongPressGestureRecognizer、UIPanGestureRecognizer等，用于实现长按、拖动、捏合、旋转、滑动和点击等不同手势。

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在创建的UIView子类或者UIViewController的 init方法，或者 loadView或者 viewDidLoad等方法中加入手势识别器。

并用选择器指定响应动作对象方法。

一下是UIVew中加入方式

- (id)initWithFrame:(CGRect)frame
{
    if (self = [super initWithFrame:frame])
    {
	//向右滑动
	UISwipeGestureRecognizer  *swipeRight = [[UISwipeGestureRecognizer alloc] initWithTarget:self action:@selector(swipe:)];
	[self addGestureRecognizer:swipeRight];
			        
	//向左滑动
	UISwipeGestureRecognizer *swipeLeft = [[UISwipeGestureRecognizer alloc] initWithTarget:self action:@selector(swipe:)];
	swipeLeft.direction = UISwipeGestureRecognizerDirectionLeft;
	[self addGestureRecognizer:swipeLeft];
			
	//单击事件     
	UITapGestureRecognizer* singleRecognizer = [[UITapGestureRecognizer alloc] initWithTarget:self action:@selector(SingleTap:)];
	//点击的次数
	singleRecognizer.numberOfTapsRequired = 1;
	//给self.view添加一个手势监测；
	[self addGestureRecognizer:singleRecognizer];
			
	//双击事件
	UITapGestureRecognizer* doubleRecognizer = [[UITapGestureRecognizer alloc] initWithTarget:selfaction:@selector(DoubleTap:)];
	doubleTapRecognizer.numberOfTapsRequired = 2;
	//关键语句，给self.view添加一个手势监测；
	[self addGestureRecognizer:doubleRecognizer];
	    
	//button长按事件
        UILongPressGestureRecognizer *longPress = [[UILongPressGestureRecognizer alloc] initWithTarget:self action:@selector(btnLong:)];
        longPress.minimumPressDuration = 0.4; //定义按的时间
        [self addGestureRecognizer:longPress];
    }
    return self;
}

#pragma mark - 左右移动手势响应动作处理方法
-(void)swipe:(UISwipeGestureRecognizer *)g
{
    if ( g.direction == UISwipeGestureRecognizerDirectionRight )
    {
        NSLog(@"right->");
    } else {
        NSLog(@"<-left");
    }
}

#pragma mark - 处理单击操作
-(void) SingleTap:(UITapGestureRecognizer*) g
{
    NSLog(@"Tap");
}

#pragma mark - 处理双击操作
-(void) DoubleTap:(UITapGestureRecognizer*) g
{
    NSLog(@"Tap");
}

#pragma mark - 按钮长按处理方法
-(void)btnLong:(UILongPressGestureRecognizer *)gestureRecognizer
{
    if ([gestureRecognizer state] == UIGestureRecognizerStateBegan)
    {
    }
}

如果在UIViewController中使用，指定好哪个UIView控件使用即可，例如

给webview加入向左滑动

[webview addGestureRecognizer:swipeLeft];

给搜索按钮加入长按事件

[searchButton addGestureRecognizer:longPress];

UIGestureRecognizer基类是一个抽象类，主要是使用它的以下子类来实现各种手势
长按
UILongPressGestureRecognizer
拖动
UIPanGestureRecognizer
捏合
UIPinchGestureRecognizer
旋转
UIRotationGestureRecognizer
滑动
UISwipeGestureRecognizer
点击
UITapGestureRecognizer

参考IOS官方文档: UIGestureRecognizer