ios - 按下背景时如何动画隐藏选择器视图

Question

当点击背景时，如何动画隐藏选择器视图？试过这个：

[self.picker setHidden:YES];

但是选择器突然消失了。我希望它在屏幕外向下动画。注意：我知道如何实现点击背景以消失部分帖子，所以请忽略它。

Answer 1

[UIView animateWithDuration:0.3 animations:^{
    self.picker.center = CGPointMake(self.picker.center.x, self.picker.center.y + self.picker.frame.size.height);
} completion:^(BOOL finished){
    self.picker.hidden = YES;
}];

这会将选取器滑到底部，然后在动画结束时将其隐藏。

Answer 2

[UIView beginAnimations:nil context:nil];
    [UIView setAnimationDuration:0.3f]; // you can set value as per you need.
    [self.picker setHidden:YES];
    [UIView commitAnimations];

Answer 3

[UIView animateWithDuration:0.3 animations:^{
     self.picker.frame = CGRectMake(self.picker.frame.origin.x,self.picker.frame.origin.y+self.picker.frame.size.height,self.picker.frame.size.width,self.picker.frame.size.height);
}completion:^(BOOL fin) {

}];