ios - 在导航项中隐藏返回文本

Question

我需要通过替换导航栏中的后退文本(按钮)来设置后退箭头。我可以查看后退箭头，但我不知道如何隐藏导航项中的后退文本。这是我的代码:

收到警告:CGImageCreateWithImageProvider:图像大小无效:0 x 0。

(void)viewWillAppear:(BOOL)animated
 {
    UIImage *backButtonHomeImage = [[UIImage imageNamed:@"back-arrow.png"] resizableImageWithCapInsets:UIEdgeInsetsMake(0, 0, 104, 13)];
    [[UIBarButtonItem appearance] setBackButtonBackgroundImage:backButtonHomeImage  forState:UIControlStateNormal barMetrics:UIBarMetricsDefault];

    self.navigationItem.leftBarButtonItem = nil;
}

Answer 1

答案

    -(void)viewWillAppear:(BOOL)animated
     {
        [super viewWillAppear:animated];
        if([self.navigationController.viewControllers objectAtIndex:0] != self)
        {
            UIButton *backButton = [[UIButton alloc] initWithFrame:CGRectMake(0, 0, 26, 26)];
            [backButton setImage:[UIImage imageNamed:@"back-arrow.png"] forState:UIControlStateNormal];
            [backButton setShowsTouchWhenHighlighted:TRUE];
            [backButton addTarget:self action:@selector(popViewControllerWithAnimation) forControlEvents:UIControlEventTouchDown];
            UIBarButtonItem *barBackItem = [[UIBarButtonItem alloc] initWithCustomView:backButton];
            self.navigationItem.hidesBackButton = TRUE;
            self.navigationItem.leftBarButtonItem = barBackItem;
        }
}

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

}

可能会有所帮助。