更改UIBarButton的图像

Question

我的目标是在程序中通过编程方式更改作为IBOutlet使用的UIBarButton的图像。

我在stackoverflow上找到了这个解决方案change-image-of-uibutton-with-other-image，但在iOS 4.2上不起作用。

有人能帮帮我吗。 Simon

我尝试过：

UIImage *image = [UIImage imageWithContentsOfFile: 
                 [[NSBundle mainBundle] pathForResource:@"play" ofType:@"png"]];
playButton.image = image;

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UIImage *image = [UIImage imageWithContentsOfFile:
                 [[NSBundle mainBundle] pathForResource:@"play" ofType:@"png"]];UIImage *image = [UIImage imageWithContentsOfFile: [[NSBundle mainBundle] pathForResource:@"play" ofType:@"png"]];
CGRect frame = CGRectMake(0, 0, image.size.width, image.size.height);
UIButton* someButton = [[UIButton alloc] initWithFrame:frame];
[someButton setBackgroundImage:image forState:UIControlStateNormal];
[someButton setShowsTouchWhenHighlighted:YES];
playButton = [[UIBarButtonItem alloc]initWithCustomView:someButton];

[someButton release];

- endo.anaconda

Answer 1

如果你想把一张图片放在一个按钮上，可以使用以下代码。

UIImage *image = [UIImage imageWithContentsOfFile: [[NSBundle mainBundle] pathForResource:@"play" ofType:@"png"]];

CGRect frame = CGRectMake(0, 0, image.size.width, image.size.height);

UIButton* someButton = [UIButton buttonWithType:UIButtonTypeCustom];
[someButton setBackgroundImage:image forState:UIControlStateNormal];
[someButton setShowsTouchWhenHighlighted:YES];
playButton = [[UIBarButtonItem alloc]initWithCustomView:someButton];

- Satya

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加载UIImage的简短方法：UIImage *image = [UIImage imageNamed:@"play.png"]; - Tommy