假设你有一个名为 button1 的 UIButton,你可以这样做:
imageView1 = [[UIImageView alloc] initWithFrame:CGRectMake(0, 0, 40, 40)];
imageView1.center = CGPointMake(25, button1.frame.size.height / 2);
imageView1.image = [UIImage imageNamed:@"ThumbsUp.png"];
[button1 addSubview:imageView1];
[imageView1 release];
imageView2 = [[UIImageView alloc] initWithFrame:CGRectMake(0, 0, 40, 40)];
imageView2.center = CGPointMake(button1.frame.size.width - 25, button1.frame.size.height / 2);
imageView2.image = [UIImage imageNamed:@"ThumbsDown.png"];
[button1 addSubview:imageView2];
[imageView2 release];
这里我们向按钮添加两个图像视图,并使用它们的中心来定位它们。对于 imageView1,我们将其设置为距按钮左侧 25 个像素。对于 imageView2,我们从按钮的宽度中减去 25。
现在我们要设置旋转代码:
- (void)willAnimateRotationToInterfaceOrientation:(UIInterfaceOrientation) interfaceOrientation duration:(NSTimeInterval)duration {
if (interfaceOrientation == UIDeviceOrientationPortrait || interfaceOrientation == UIDeviceOrientationPortraitUpsideDown) {
[button1 setFrame:CGRectMake(10, 100, 300, 50)];
} else {
[button1 setFrame:CGRectMake(40, 50, 400, 50)];
}
imageView2.center = CGPointMake(button1.frame.size.width - 25, button1.frame.size.height / 2);
}
这里我们根据我们是纵向还是横向来更改按钮的框架,最后我们设置 imageView2 的中心来调整不同的框架。我们不必为 imageView1 烦恼,因为它保持不变。