UiBarButtonItem背景图像直到第一次点击才显示

Question

In my AppDelegate.m file I have created the following back button style:

    UIImage *backBtnImage = [UIImage imageNamed:@"back.png"];
    [[UIBarButtonItem appearance] setBackButtonBackgroundImage: backBtnImage forState: UIControlStateNormal barMetrics: UIBarMetricsDefault];
    [[UIBarButtonItem appearance] setBackButtonBackgroundImage: backBtnImage forState: UIControlStateHighlighted barMetrics: UIBarMetricsDefault];

For some reason the background image only shows on each view after the space where the button is is tapped once - it loads everytime for each view after that.

I've tried cleaning the project but to no avail.

Answer 1

嗯，如果你在你的模拟器上运行它，尝试重置内容和设置，如果这不起作用，我知道iOS设备有一些缓存问题，尝试更改实际文件和xcode中的引用中的照片name.png 。