Ios UIView setHidden:无类似下拉列表

我有一个最初隐藏的UIView。我需要设置隐藏：没有可见的下拉效果

这是我的简单代码，没有效果

-(IBAction)btnAbrirDestaquesClick:(id)sender {
[self.viewDestaques setHidden:NO];
}

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iOS 7中UIDynamicMator的一个更简单的替代方案是Spring动画，这是一种新的功能强大的UIView块动画，它可以通过阻尼和速度为您提供良好的反弹效果：

[UIView animateWithDuration:duration
  delay:delay
  usingSpringWithDamping:damping
  initialSpringVelocity:velocity
  options:options animations:^{
    //Animations
     [self.viewDestaques setHidden:NO];

    }
  completion:^(BOOL finished) {
    //Completion Block
}];

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如果您只是想设置动画，请尝试以下操作：

[UIView animateWithDuration:.5 delay:0.0 options:UIViewAnimationOptionCurveEaseIn animations:^{
    self.viewDestaques.frame  = CGRectMake(0, 0, 320,30);
} completion:^(BOOL finished) {

    [UIView animateWithDuration:.5 delay:2.0 options:UIViewAnimationOptionCurveEaseIn animations:^{
        self.viewDestaques.frame  = CGRectMake(0, -30, 320,30);

    } completion:^(BOOL finished) {

    }];

}];

这对我很有用：

-(IBAction)btnAbrirDestaquesClick:(id)sender {
[self.viewDestaques setTranslatesAutoresizingMaskIntoConstraints:YES]; //respeita o frame que eu setar, independentemente das constraints

[self.viewDestaques setFrame:CGRectMake(self.viewDestaques.frame.origin.x, self.viewDestaques.frame.origin.y, self.viewDestaques.frame.size.width, 0)];

[self.viewDestaques setHidden:NO];

while (self.viewDestaques.frame.size.height < self.frameViewDestaquesOriginal.size.height) {


    [UIView animateWithDuration:2.0 animations:^{
        [self.viewDestaques setFrame:CGRectMake(self.viewDestaques.frame.origin.x, self.viewDestaques.frame.origin.y, self.viewDestaques.frame.size.width, self.view.frame.size.height + 10)];
    }completion: ^(BOOL completed){
    }];

   }
 }

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你能详细解释一下吗？你能展示一下你是如何初始化self.viewdestques的吗？你的视图在nib中还是你通过编程添加的？我的视图在nib中…我可以隐藏和显示…但我需要像下拉菜单一样显示…你能确切地解释一下你想要实现的目标吗？您需要帮助的内容非常不清楚。我应该使用哪个动画来实现下拉效果？使用UIViewAnimationOptionTransitionCurlDown