扭曲的導航欄自定義後退按鈕

Question

我有一個自定義後退按鈕和按鈕顯示不爲意，它被拉伸，即使後退按鈕文本爲空，它仍然顯示「回「 文字。

在此先感謝。

Answer 1

我通常使用這種技術，使其工作：

1. 爲了擺脫默認標題：

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

2. 使用可調整大小的圖像：

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

Answer 2

嘗試像

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; 

或發佈您的代碼。