本文實例為大家分享了iOS實現應用懸浮窗效果的具體代碼，供大家參考，具體內容如下
需求
在一個app應用的最頂部添加一個懸浮窗，就像ios系統AssistiveTouch 可以左右滑動，但是最終會停在左邊或右邊。
實現思路
在應用的視圖的最頂層添加一個UIWindow，用這個UIWindow 充當懸浮窗，給UIWindow添加移動的手勢監聽，讓懸浮窗隨著手指移動，釋放的時候，讓它以動畫的方式靠邊
代碼
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//懸浮窗測試//創建一個懸浮窗口mwindow = [[AssistiveTouch alloc]initWithFrame:CGRectMake(100, 200, 40, 40) imageName:@"1.png"];//ios9 window要設置rootview 不然崩潰UIViewController *controller = [[UIViewController alloc] init];mwindow.rootViewController = controller;//展示懸浮窗。。[self.window makeKeyAndVisible]; |
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//添加移動的手勢UIPanGestureRecognizer *pan = [[UIPanGestureRecognizer alloc]initWithTarget:self action:@selector(locationChange:)]; pan.delaysTouchesBegan = YES; [self addGestureRecognizer:pan]; |
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//改變位置-(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內容，希望對大家的學習有所幫助，也希望大家多多支持服務器之家。
原文鏈接：https://blog.csdn.net/u011993697/article/details/51428207
