iOS navigationController 改变 titl

1.添加navigationController的title

[self.navigationItem setTitle:@""];

2.设置navigationController title 的颜色

UIColor *color = [UIColor whiteColor];

NSDictionary *dict = [NSDictionary dictionaryWithObject:color forKey:UITextAttributeTextColor];

self.navigationController.navigationBar.titleTextAttributes = dict;