ios - UIButton 动画被跳过

Question

我为我的按钮实现了滑入屏幕的动画。如果按钮已经在屏幕内，我希望我的按钮先滑到外面，然后再滑回来。

然而，第一个动画(当按钮已经滑入屏幕时)被跳过，因此按钮只是立即跳出屏幕然后向后滑动。

我想让它们慢慢地滑到外面，然后再慢慢地滑回来。

它有点像 if 子句中的 setAnimationDuration 被忽略:

[self.buttonInfoFrame setAlpha:1.0];
[self.buttonSetCourse setAlpha:1.0];
[self.buttonSetCourse setEnabled:YES];

if(![self.selected isEqual: @""])
{
    CGRect frame = self.buttonInfoFrame.frame;
    frame.origin.x = 1050;
    frame.origin.y = 150;

    CGRect frame2 = self.buttonSetCourse.frame;
    frame2.origin.x = 1050;
    frame2.origin.y = 526;

    [UIView beginAnimations:nil context:nil];
    [UIView setAnimationDuration:1.0];

    self.buttonInfoFrame.frame = frame;
    self.buttonSetCourse.frame = frame2;

    [UIView commitAnimations];
}

CGRect frame = self.buttonInfoFrame.frame;
frame.origin.x = 757;
frame.origin.y = 150;

CGRect frame2 = self.buttonSetCourse.frame;
frame2.origin.x = 747;
frame2.origin.y = 526;

[UIView beginAnimations:nil context:nil];
[UIView setAnimationDuration:1.0];

self.buttonInfoFrame.frame = frame;
self.buttonSetCourse.frame = frame2;

[UIView commitAnimations];

Answer 1

在第一个动画的完成 block 中编写你的第二个动画!

编辑

   if(![self.selected isEqual: @""])
    {
        CGRect frame = self.buttonInfoFrame.frame;
        frame.origin.x = 1050;
        frame.origin.y = 150;

        CGRect frame2 = self.buttonSetCourse.frame;
        frame2.origin.x = 1050;
        frame2.origin.y = 526;

        [UIView animateWithDuration:1,0 delay:0.0 options:option
            animations:^{
                self.buttonInfoFrame.frame = frame;
                self.buttonSetCourse.frame = frame2;
            }
            completion:^(BOOL finished){
                CGRect frame = self.buttonInfoFrame.frame;
                frame.origin.x = 757;
                frame.origin.y = 150;

                CGRect frame2 = self.buttonSetCourse.frame;
                frame2.origin.x = 747;
                frame2.origin.y = 526;

                [UIView animateWithDuration:1.0 delay:0.0 options:option
                    animations:^{
                        self.buttonInfoFrame.frame = frame;
                        self.buttonSetCourse.frame = frame2;
                    }
                    completion:nil];
        }];

} else {

    CGRect frame = self.buttonInfoFrame.frame;
    frame.origin.x = 757;
    frame.origin.y = 150;

    CGRect frame2 = self.buttonSetCourse.frame;
    frame2.origin.x = 747;
    frame2.origin.y = 526;

    [UIView animateWithDuration:1.0 delay:0.0 options:option
        animations:^{
            self.buttonInfoFrame.frame = frame;
            self.buttonSetCourse.frame = frame2;
        }
        completion:nil];
        }];
}