扭曲的导航栏自定义后退按钮

Question

我有一个自定义后退按钮，按钮没有按预期显示，正在拉伸，即使后退按钮文本为空，它仍然显示“后退” 文本。

提前致谢。

Answer 1

我通常使用这种技术使其工作：

1. 要摆脱默认标题：

   [[UIBarButtonItem appearance] setBackButtonTitlePositionAdjustment:UIOffsetMake(-400.f, 0) forBarMetrics:UIBarMetricsDefault];
   

2. 使用可调整大小的图片：

   UIImage *backButton = [UIImage imageNamed:@"back.png"];         
   [[UIBarButtonItem appearance] setBackButtonBackgroundImage:[backButton resizableImageWithCapInsets:UIEdgeInsetsMake(0, backButton.size.width, 0, 0)] forState:UIControlStateNormal barMetrics:UIBarMetricsDefault];
   

Answer 2

尝试类似

的内容

UIButton *back = [UIButton buttonWithType:UIButtonTypeCustom];  
UIImage *image = ... your image
[back setBackgroundImage:image forState:UIControlStateNormal];  
[back addTarget:self action:@selector(back) forControlEvents:UIControlEventTouchUpInside];
back.frame = CGRectMake(0, 0, image.size.width, image.size.height);
UIBarButtonItem *backbi = [[UIBarButtonItem alloc] initWithCustomView:back];  
self.navigationItem.leftBarButtonItem = backbi;

或发布您的代码。