如何在按下背景時隱藏選取器視圖

Question

如何在背景被點擊時隱藏選取器視圖的動畫？試過這個：

[self.picker setHidden:YES]; 

但是選取器突然消失。我希望它在屏幕外向下動畫。 注意：我知道如何實現輕敲背景消失部分帖子，所以請忽略它。

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; 
}]; 

此滑動的拾取器出至底部，然後隱藏它在動畫完成時。

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) { 

}];