ios-不向ViewController上的NavigationBar添加backbutton

Question

我无法添加NavigationBar后退按钮。 我想在ViewController上执行此操作，我尝试了不同的方法，但无法解决。 您需要使用Backbutton NavigationController来使用，还是可以在ViewController上执行？ 等待您的帮助。

Answer 1

如果您的ViewController在导航控制器中，则应该可以执行以下操作：

[self.navigationController popViewControllerAnimated:YES];

Answer 2

隐藏默认的后退按钮

    [self.navigationItem setHidesBackButton:YES animated:YES];

    UIButton *backBtn = [UIButton buttonWithType:UIButtonTypeCustom];
    UIImage *backBtnImage = [UIImage imageNamed:@"back_arrow.png"]  ;
    [backBtn setBackgroundImage:backBtnImage forState:UIControlStateNormal];
    [backBtn addTarget:self action:@selector(goback) forControlEvents:UIControlEventTouchUpInside];
    backBtn.frame = CGRectMake(0, 0, 35, 23);
    UIBarButtonItem *backButton = [[UIBarButtonItem alloc] initWithCustomView:backBtn] ;
    self.navigationItem.leftBarButtonItem = backButton;

- (void)goback
{
    [self.navigationController popViewControllerAnimated:YES];
}