ios - 动画 Logo 从中心点向左向右移动

Question

在使用 UIView 动画时，我绝对是个初学者。我需要做的就是将 imageView 从起始位置向右移动 40 点，并将位置从初始位置向左移动 40 点。这应该不断重复......

- (void)animateLogo
{
    [UIView animateWithDuration:2.0
                          delay:0.0
                        options:UIViewAnimationOptionCurveEaseIn | UIViewAnimationOptionAutoreverse | UIViewAnimationOptionRepeat
                     animations:^{
                         CGRect frame = CGRectMake(self.Logo.frame.origin.y, 10.0, self.Logo.frame.size.width, self.Logo.frame.size.height);
                         self.Logo.frame = frame;
                     }
                     completion:nil];
}

所有这一切只是将它向上向下移动而不是向左向右移动。我尝试将 X 参数设置为 10 但没有改变....我该怎么做？

Answer 1

工作代码:

//note that this rect has x = 0
// you don't have to set this startRect if you created your logo in storyboard
CGRect startRect = CGRectMake(0, 0, 300, 300);
[self.Logo setFrame:startRect];

[UIView animateWithDuration:2.0
                      delay:0.0
                    options:UIViewAnimationOptionCurveEaseIn | UIViewAnimationOptionAutoreverse | UIViewAnimationOptionRepeat
                 animations:^{
                     //note that this x is  +40
                     CGRect frame = CGRectMake(self.Logo.frame.origin.x + 40, self.Logo.frame.origin.y, self.Logo.frame.size.width, self.Logo.frame.size.height);
                     self.Logo.frame = frame;
                 }
                 completion:^(BOOL finished) {
                 }];

更新

假设您的 Logo 是一个 UIImageView，尝试以编程方式创建 Logo :

CGRect startRect = CGRectMake(318, 47, 133, 97);
UIImageView *LogoImage = [[UIImageView alloc] initWithFrame:startRect];
[LogoImage setImage:[UIImage imageNamed:@"unselected_image.png"]];
[LogoImage setBackgroundColor:[UIColor redColor]];

[UIView animateWithDuration:2.0
                      delay:0.0
                    options:UIViewAnimationOptionCurveEaseIn | UIViewAnimationOptionAutoreverse | UIViewAnimationOptionRepeat
                 animations:^{
                     //note that this x is  +40
                     CGRect frame = CGRectMake(LogoImage.frame.origin.x + 40, LogoImage.frame.origin.y, LogoImage.frame.size.width, LogoImage.frame.size.height);
                     LogoImage.frame = frame;
                 }
                 completion:nil];

[self.view addSubview:LogoImage];