IOS UINavigationController 更改返回按钮

UIButton *back = [UIButton buttonWithType:UIButtonTypeCustom];

back.titleLabel.font = [UIFont boldSystemFontOfSize:13];

[back setTitle:@"Back" forState:UIControlStateNormal];

[back setFrame:CGRectMake(5, 2, 52, 30)];

[back setBackgroundImage:[UIImage imageNamed:@"bar_return"] forState:UIControlStateNormal];

[back addTarget:self action:@selector(popDiyView) forControlEvents:UIControlEventTouchUpInside];

UIBarButtonItem *barButton = [[UIBarButtonItem alloc] initWithCustomView:back];

self.navigationItem.leftBarButtonItem = barButton;

修改导航栏背景  和导航栏标题颜色

[self.navigationController.navigationBar setBarTintColor:[UIColor colorWithRed:46/255.0 green:46/255.0 blue:56/255.0 alpha:1.0]];

    [self.navigationController.navigationBar setTitleTextAttributes:[NSDictionary dictionaryWithObjectsAndKeys:[UIColor whiteColor],NSForegroundColorAttributeName,nil]];