最近的一个项目需要一个弹出窗口.
效果如下:
实现步骤:
- 新建一个view controller
- 新建一个.xib文件.
- .xib跟view controller建立连接.然后在
viewDidLoad方法中加入以下代码:
- (void)viewDidLoad
{
self.view.backgroundColor=[[UIColor blackColor] colorWithAlphaComponent:.6];
self.popUpView.layer.cornerRadius = 5;
self.popUpView.layer.shadowOpacity = 0.8;
self.popUpView.layer.shadowOffset = CGSizeMake(0.0f, 0.0f);
[super viewDidLoad];
// Do any additional setup after loading the view from its nib.
}
4 实现pop up window的打开与关闭效果.代码比较简单易懂,就不做解释了.
- (void)showAnimate
{
self.view.transform = CGAffineTransformMakeScale(1.3, 1.3);
self.view.alpha = 0;
[UIView animateWithDuration:.25 animations:^{
self.view.alpha = 1;
self.view.transform = CGAffineTransformMakeScale(1, 1);
}];
}
- (void)removeAnimate
{
[UIView animateWithDuration:.25 animations:^{
self.view.transform = CGAffineTransformMakeScale(1.3, 1.3);
self.view.alpha = 0.0;
} completion:^(BOOL finished) {
if (finished) {
[self.view removeFromSuperview];
}
}];
}
5 最后,由一个IBAction来触发弹出窗口的关闭动作(xib的close button与view controller建立连接即可).
- (IBAction)closePopup:(id)sender {
[self removeAnimate];
}
- (void)showInView:(UIView *)aView animated:(BOOL)animated
{
[aView addSubview:self.view];
if (animated) {
[self showAnimate];
}
}
