iOS仿简书、淘宝等App的View弹出效果

 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];

- (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]];  //显示maskView  [_maskView setAlpha:0.5f];  //popView上升  _popView.frame = frame;  } completion:^(BOOL finished) {  }];  }]; }

- (CATransform3D)firstTransform{ CATransform3D t1 = CATransform3DIdentity; t1.m34 = 1.0/-900; //带点缩小的效果 t1 = CATransform3DScale(t1, 0.95, 0.95, 1); //绕x轴旋转 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); //第二次缩小 t2 = CATransform3DScale(t2, 0.8, 0.8, 1); return t2;}

- (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隐藏 [_maskView setAlpha:0.f]; //popView下降 _popView.frame = frame; //同时进行 感觉更丝滑 [_rootview.layer setTransform:[self firstTransform]];  } completion:^(BOOL finished) {  [UIView animateWithDuration:0.3 delay:0 options:UIViewAnimationOptionCurveEaseInOut animations:^{  //变为初始值  [_rootview.layer setTransform:CATransform3DIdentity];  } completion:^(BOOL finished) {   //移除  [_popView removeFromSuperview]; }];  }];  }