更改 UIBarButton 的图像答案

【问题标题】：change image of UIBarButton更改 UIBarButton 的图像
【发布时间】：2017-12-07 08:08:34
【问题描述】：

我的目标是以编程方式更改 UIBarButton（我用作 IBOutlet）的图像。

我在 stackoverflow change-image-of-uibutton-with-other-image 上找到了这个解决方案。但这不适用于 iOS 4.2。

谁能帮帮我。西蒙

我试过了：

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

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];

【问题讨论】：

标签： iphone image ios4 uibarbuttonitem

【解决方案1】：

如果您想将图像放到按钮上，请使用以下代码。

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];

【讨论】：

更短的加载 UIImage 的方法UIImage *image = [UIImage imageNamed:@"play.png"];