UIBarButtonItem不顯示禁用狀態titleTextAttributes

Question

我試圖設置禁用textAttributes在UIBarButtonItem在UIToolbar。

創建我的項目，像這樣：

NSDictionary *enabledAttrs = @{ NSFontAttributeName    : font, 
            NSForegroundColorAttributeName : color }; 

NSDictionary *disabledAttrs = @{ NSFontAttributeName    : font, 
            NSForegroundColorAttributeName : [UIColor grayColor] }; 

[item setTitleTextAttributes:enabledAttrs forState:UIControlStateNormal]; 
[item setTitleTextAttributes:disabledAttrs forState:UIControlStateDisabled]; 

然而，當我設置item.enabled = NO，按鈕被禁用（它不火的動作），但它並沒有履行titleTextAttributes - 它仍然會出現在正常狀態。爲什麼？

Answer 1

創建UIButton並用UIBarbutton包裝，我認爲它應該是工作。

UIButton *uiButton = [[UIButton alloc] init]; 
[uiButton setTitleColor: color1 forState: UIControlStateNormal]; 
[uiButton setTitleColor: color2 forState: UIControlStateDisabled]; 

UIBarButtonItem *uiBarButtonItem = [[UIBarButtonItem alloc] initWithCustomView:uiButton];