如何使用动画更改视图的框架？

Question

我是初学者。我正在更新视图的框架。我对动画有点困惑。我只想知道如何使用任何类型的动画更新视图的框架。

这是我更新框架的地方：

- (IBAction)btnCountries:(id)sender {

    _dropDownView.hidden =  NO;
    fromCountry=YES;
    fromCity = NO;
    fromState = NO;
    _dropDownView.frame = CGRectMake(132.0f, 63.0f, 172.0f, 308.0f);

    [self.tblDropDown reloadData];

}

非常感谢任何帮助。

Answer 1

您可以使用 UIView 方法 animationWithDuration: 或 CoreAnimation 框架。

[UIView animateWithDuration:0.5 animations:^{
        // animation here
        _dropDownView.frame = CGRectMake(132.0f, 63.0f, 172.0f, 308.0f);
}];

Answer 2

  [self.view setUserInteractionEnabled:NO];

  [UIView animateWithDuration:0.5 delay:0.0 options:UIViewAnimationOptionTransitionNone
                                 animations:^{

                                    _dropDownView.frame = CGRectMake(132.0f, 63.0f, 172.0f, 308.0f); 

                                 }
                                 completion:^(BOOL finished) {

                                [self.view setUserInteractionEnabled:YES];



                                 }];

Answer 3

UIView支持如下动画，

_dropDownView.hidden =  NO;fromCountry=YES;
fromCity = NO;
fromState = NO;

UIView animateWithDuration:1.0f animations:^
{
    _dropDownView.frame = CGRectMake(132.0f, 63.0f, 172.0f, 308.0f);
} completion:^(BOOL finished)
{
    [self.tblDropDown reloadData];
}

Answer 4

试试下面的代码

- (IBAction)btnCountries:(id)sender {

    _dropDownView.hidden =  NO;
    fromCountry=YES;
    fromCity = NO;
    fromState = NO;
    [UIView animateWithDuration:2.0
                     animations:^{
                         CGRect frame = _dropDownView.frame;
                         frame=CGRectMake(132.0f, 63.0f, 172.0f, 308.0f);
                         _dropDownView.frame = frame;
                     }
                     completion:^(BOOL finished){
                         [self.tblDropDown reloadData];
                     }];

}

希望对你有帮助..

如何使用动画更改视图的框架？

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