设置navigationBar的titleTextAttriubutes仅会使应用程序在ios 7.1设备上崩溃而不是模拟器

Question

这是使应用程序崩溃的代码

navigationBar.titleTextAttributes = [NSForegroundColorAttributeName: NAV_BAR_TINT_COLOR]

这是输出

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) 

这行代码曾经用于xcode 6 beta 4，我刚刚更新为xcode 6 beta 5，应用崩溃

Answer 1

你可以试试这个吗？

[[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()