設置navigationBar的titleTextAttriubutes僅會使應用程序在ios 7.1設備上崩潰而不是模擬器

Question

這是使應用程序崩潰的代碼

navigationBar.titleTextAttributes = [NSForegroundColorAttributeName: NAV_BAR_TINT_COLOR]

這是輸出

2014-08-13 18:21:47.567 demoapp[1214:60b] *** NSForwarding: warning: object 0x102e90000 of class '_TtCSs29_NativeDictionaryStorageOwner0000000156D27548' does not implement methodSignatureForSelector: -- trouble ahead
(lldb) 

這行代碼曾經用於xcode 6 beta 4，我剛剛更新為xcode 6 beta 5，應用崩潰

Answer 1

你可以試試這個嗎？

[[UINavigationBar appearance]setTitleTextAttributes:@{UITextAttributeTextColor : [UIColor whiteColor]}];

Answer 2

  This code work for me.May be it's helpful for you.

 let titleDict: NSDictionary = [NSForegroundColorAttributeName: UIColor.greenColor()]
 self.navigationController.navigationBar.titleTextAttributes =  titleDict
 self.navigationController.navigationBar.tintColor = UIColor.whiteColor()