iOS仿簡(jiǎn)書、淘寶等App的View彈出效果
用簡(jiǎn)書App的時(shí)候覺得這個(gè)View的彈出效果特別好,而且非常平滑,所以我就嘗試寫了一個(gè),和簡(jiǎn)書App上的效果基本一致了:

下面開始講解:
1.首先我們要知道這個(gè)頁(yè)面有幾個(gè)View?這個(gè)頁(yè)面其實(shí)有四個(gè)View,self.view , 圖中白色VC的View rootVC.view ,白色VC上的maskView maskView , 以及彈出的popView popView 。我們創(chuàng)建它們:
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];
//加個(gè)陰影
popView.layer.shadowColor = [UIColor blackColor].CGColor;
popView.layer.shadowOffset = CGSizeMake(0.5, 0.5);
popView.layer.shadowOpacity = 0.8;
popView.layer.shadowRadius = 5;
//關(guān)閉btn
UIButton * closeBtn = [UIButton buttonWithType:UIButtonTypeCustom];
closeBtn.frame = CGRectMake(15, 0, 50, 40);
[closeBtn setTitle:@"關(guān)閉" 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.然后要添加點(diǎn)擊事件,這里為了方便我的彈出事件直接用的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 options:UIViewAnimationOptionCurveEaseInOut animations:^{
[_rootview.layer setTransform:[self firstTransform]];
} completion:^(BOOL finished) {
[UIView animateWithDuration:0.3 delay:0 options:UIViewAnimationOptionCurveEaseInOut animations:^{
[_rootview.layer setTransform:[self secondTransform]];
//顯示maskView
[_maskView setAlpha:0.5f];
//popView上升
_popView.frame = frame;
} completion:^(BOOL finished) {
}];
}];
}
這里要注意一下的就是popview是添加到window上面的:[[UIApplication sharedApplication].windows[0] addSubview:_popView];
然后關(guān)鍵的layer形變方法來(lái)了
- (CATransform3D)firstTransform{
CATransform3D t1 = CATransform3DIdentity;
t1.m34 = 1.0/-900;
//帶點(diǎn)縮小的效果
t1 = CATransform3DScale(t1, 0.95, 0.95, 1);
//繞x軸旋轉(zhuǎn)
t1 = CATransform3DRotate(t1, 15.0 * M_PI/180.0, 1, 0, 0);
return t1;
}
- (CATransform3D)secondTransform{
CATransform3D t2 = CATransform3DIdentity;
t2.m34 = [self firstTransform].m34;
//向上移
t2 = CATransform3DTranslate(t2, 0, self.view.frame.size.height * (-0.08), 0);
//第二次縮小
t2 = CATransform3DScale(t2, 0.8, 0.8, 1);
return t2;
}
大家可以看到這,應(yīng)該可以發(fā)現(xiàn)這里其實(shí)有兩次形變
3.隱藏動(dòng)畫
- (void)close
{
_isShow = NO;
CGRect frame = _popView.frame;
frame.origin.y += self.view.frame.size.height/2.0;
[UIView animateWithDuration:0.3 delay:0 options:UIViewAnimationOptionCurveEaseInOut animations:^{
//maskView隱藏
[_maskView setAlpha:0.f];
//popView下降
_popView.frame = frame;
//同時(shí)進(jìn)行 感覺更絲滑
[_rootview.layer setTransform:[self firstTransform]];
} completion:^(BOOL finished) {
[UIView animateWithDuration:0.3 delay:0 options:UIViewAnimationOptionCurveEaseInOut animations:^{
//變?yōu)槌跏贾?
[_rootview.layer setTransform:CATransform3DIdentity];
} completion:^(BOOL finished) {
//移除
[_popView removeFromSuperview];
}];
}];
}
最后,完整代碼,已經(jīng)封裝好了,繼承之后使用創(chuàng)建方法就行了
GitHub:Wzxhaha
以上就是本文的全部?jī)?nèi)容,希望對(duì)大家的學(xué)習(xí)有所幫助,也希望大家多多支持腳本之家。
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