ios - 自定义 UIBarButtonItem 后退按钮

Question

我需要自定义 UIBarButtonItem 后退按钮，以便它显示一个简单的箭头图标(如在 Facebook、Twitter 等中)。我是否需要创建一个自定义 UIBarButtonItem 并将其手动添加到导航栏，或者是否有办法通过外观 API 执行此操作？

谢谢

Answer 1

你必须自己制作并添加它

你可以这样做(这是针对使用图像的自定义按钮)

UIImage* image3 = [UIImage imageNamed:@"favorites.png"];
    CGRect frameimg = CGRectMake(0, 0, image3.size.width, image3.size.height);

    UIButton *someButton2 = [[UIButton alloc] initWithFrame:frameimg];
    [someButton2 setBackgroundImage:image3 forState:UIControlStateNormal];
    [someButton2 addTarget:self action:@selector(loadFavorites)
          forControlEvents:UIControlEventTouchUpInside];
    [someButton2 setShowsTouchWhenHighlighted:YES];

    UIBarButtonItem *favoritesButton =[[UIBarButtonItem alloc] initWithCustomView:someButton2];

    self.navigationItem.rightBarButtonItems =[NSArray arrayWithObjects:favoritesButton, nil];