本文实例为大家分享了iOS实现应用悬浮窗效果的具体代码，供大家参考，具体内容如下
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
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//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]; |
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//添加移动的手势UIPanGestureRecognizer *pan = [[UIPanGestureRecognizer alloc]initWithTarget:self action:@selector(locationChange:)]; pan.delaysTouchesBegan = YES; [self addGestureRecognizer:pan]; |
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//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); }]; } } }} |
以上就是本文的全部内容，希望对大家的学习有所帮助，也希望大家多多支持服务器之家。
原文链接：https://blog.csdn.net/u011993697/article/details/51428207
