仿简书、淘宝等等App的View弹出效果

497 查看

pop.png

昨天用简书App的时候觉得这个View的弹出效果特别好，而且非常平滑，所以我就尝试写了一个，和简书App上的效果基本一致了:

JianShuPop.gif

下面开始讲解:

1.首先我们要知道这个页面有几个View？这个页面其实有四个View，`self.view` , 图中白色VC的View `rootVC.view` ,白色VC上的maskView `maskView` , 以及弹出的popView `popView` 。我们创建它们：

self.view.backgroundColor = [UIColor blackColor];

_popView = ({

UIView * popView = [[UIView alloc]initWithFrame:CGRectMake(0, [UIScreen mainScreen].bounds.size.height, [UIScreen mainScreen].bounds.size.width, [UIScreen mainScreen].bounds.size.height /2.0)];

popView.backgroundColor = [UIColor grayColor];

//加个阴影

popView.layer.shadowColor = [UIColor blackColor].CGColor;

popView.layer.shadowOffset = CGSizeMake(0.5, 0.5);

popView.layer.shadowOpacity = 0.8;

popView.layer.shadowRadius = 5;

//关闭btn

UIButton * closeBtn = [UIButton buttonWithType:UIButtonTypeCustom];

closeBtn.frame = CGRectMake(15, 0, 50, 40);

[closeBtn setTitle:@"关闭" forState:UIControlStateNormal];

[closeBtn setTitleColor:[UIColor colorWithRed:217/255.0 green:110/255.0 blue:90/255.0 alpha:1] forState:UIControlStateNormal];

[closeBtn addTarget:self action:@selector(close) forControlEvents:UIControlEventTouchUpInside];

[popView addSubview:closeBtn];

popView;

});

//添加VC的View的方法

_rootVC.view.frame = self.view.bounds;

_rootVC.view.backgroundColor = [UIColor whiteColor];

_rootview = _rootVC.view;

[self addChildViewController:_rootVC];

[self.view addSubview:_rootview];

//rootVC上的maskView

_maskView = ({

UIView * maskView = [[UIView alloc]initWithFrame:self.view.bounds];

maskView.backgroundColor = [UIColor colorWithWhite:0 alpha:0.5];

maskView.alpha = 0;

maskView;

});

[_rootview addSubview:_maskView];

2.然后要添加点击事件，这里为了方便我的弹出事件直接用的`touchesBegan`

- (void)show

{

[[UIApplication sharedApplication].windows[0] addSubview:_popView];

CGRect frame = _popView.frame;

frame.origin.y = self.view.frame.size.height/2.0;

[UIView animateWithDuration:0.3 delay:0 "crayon-5812d2e9a1a78268422081-8"> [UIView animateWithDuration:0.3 delay:0 8e0f6tan.gif">