iOS如何实现应用悬浮窗效果

这篇文章将为大家详细讲解有关iOS如何实现应用悬浮窗效果，小编觉得挺实用的，因此分享给大家做个参考，希望大家阅读完这篇文章后可以有所收获。

需求

在一个app应用的最顶部添加一个悬浮窗，就像ios系统AssistiveTouch 可以左右滑动，但是最终会停在左边或右边。

实现思路

在应用的视图的最顶层添加一个UIWindow，用这个UIWindow 充当悬浮窗，给UIWindow添加移动的手势监听，让悬浮窗随着手指移动，释放的时候，让它以动画的方式靠边

代码

//悬浮窗测试//创建一个悬浮窗口mwindow = [[AssistiveTouch alloc]initWithFrame:CGRectMake(100, 200, 40, 40) imageName:@"1.png"];//ios9 window要设置rootview 不然崩溃UIViewController *controller = [[UIViewController alloc] init];mwindow.rootViewController = controller;//展示悬浮窗。。[self.window makeKeyAndVisible];

//添加移动的手势UIPanGestureRecognizer *pan = [[UIPanGestureRecognizer alloc]initWithTarget:self action:@selector(locationChange:)]; pan.delaysTouchesBegan = YES; [self addGestureRecognizer:pan];

//改变位置-(void)locationChange:(UIPanGestureRecognizer*)p{    //[[UIApplication sharedApplication] keyWindow]    CGPoint panPoint = [p locationInView:[[UIApplication sharedApplication] keyWindow]];    if(p.state == UIGestureRecognizerStateBegan)    {        [NSObject cancelPreviousPerformRequestsWithTarget:self selector:@selector(changeColor) object:nil];        _imageView.alpha = 0.8;    }    else if (p.state == UIGestureRecognizerStateEnded)    {        [self performSelector:@selector(changeColor) withObject:nil afterDelay:4.0];    }    if(p.state == UIGestureRecognizerStateChanged)    {        self.center = CGPointMake(panPoint.x, panPoint.y);    }    else if(p.state == UIGestureRecognizerStateEnded)    {        if(panPoint.x <= kScreenWidth/2)        {            if(panPoint.y <= 40+HEIGHT/2 && panPoint.x >= 20+WIDTH/2)            {                [UIView animateWithDuration:0.2 animations:^{                    self.center = CGPointMake(panPoint.x, HEIGHT/2);                }];            }            else if(panPoint.y >= kScreenHeight-HEIGHT/2-40 && panPoint.x >= 20+WIDTH/2)            {                [UIView animateWithDuration:0.2 animations:^{                    self.center = CGPointMake(panPoint.x, kScreenHeight-HEIGHT/2);                }];            }            else if (panPoint.x < WIDTH/2+15 && panPoint.y > kScreenHeight-HEIGHT/2)            {                [UIView animateWithDuration:0.2 animations:^{                    self.center = CGPointMake(WIDTH/2, kScreenHeight-HEIGHT/2);                }];            }            else            {                CGFloat pointy = panPoint.y < HEIGHT/2 ? HEIGHT/2 :panPoint.y;                [UIView animateWithDuration:0.2 animations:^{                    self.center = CGPointMake(WIDTH/2, pointy);                }];            }        }        else if(panPoint.x > kScreenWidth/2)        {            if(panPoint.y <= 40+HEIGHT/2 && panPoint.x < kScreenWidth-WIDTH/2-20 )            {                [UIView animateWithDuration:0.2 animations:^{                    self.center = CGPointMake(panPoint.x, HEIGHT/2);                }];            }            else if(panPoint.y >= kScreenHeight-40-HEIGHT/2 && panPoint.x < kScreenWidth-WIDTH/2-20)            {                [UIView animateWithDuration:0.2 animations:^{                    self.center = CGPointMake(panPoint.x, 480-HEIGHT/2);                }];            }            else if (panPoint.x > kScreenWidth-WIDTH/2-15 && panPoint.y < HEIGHT/2)            {                [UIView animateWithDuration:0.2 animations:^{                    self.center = CGPointMake(kScreenWidth-WIDTH/2, HEIGHT/2);                }];            }            else            {                CGFloat pointy = panPoint.y > kScreenHeight-HEIGHT/2 ? kScreenHeight-HEIGHT/2 :panPoint.y;                [UIView animateWithDuration:0.2 animations:^{                    self.center = CGPointMake(320-WIDTH/2, pointy);                }];            }        }    }}

关于"iOS如何实现应用悬浮窗效果"这篇文章就分享到这里了，希望以上内容可以对大家有一定的帮助，使各位可以学到更多知识，如果觉得文章不错，请把它分享出去让更多的人看到。