導航欄右邊按鈕:顏色
info.plist 添加 View controller-based status bar appearance, 設置爲NO,
[self.navigationController.navigationBar setBackgroundImage:[UIImage imageNamed:@"navBack"] forBarMetrics:UIBarMetricsDefault];
// leftBarButtonItem 顏色
self.navigationController.navigationBar.barStyle = UIStatusBarStyleDefault;
[self.navigationController.navigationBar setTintColor:[UIColor whiteColor]];
// nav title 顏色
UIColor *color = [UIColor whiteColor];
NSDictionary *dic = [NSDictionary dictionaryWithObject:color forKey:NSForegroundColorAttributeName];
self.navigationController.navigationBar.titleTextAttributes = dic;
// UIBarButtonItem *backItem = [[UIBarButtonItem alloc] init];
// backItem.title = @"返回";
// self.navigationItem.backBarButtonItem = backItem;