如何訪問UITabBarBackgroundView

Question

我一直在嘗試使透明tabBar背景，但有一種叫做UITabBarBackgroundView的東西存在並具有白色背景。 我如何訪問它？

Answer 1

我不認爲有這樣做的直接方式。你將不得不在這裏創造透明度的幻覺。一種方法是在標籤欄中設置圖像。您可以在UITabBarController添加下列類別，並調用它

- (void) setBackgroundImage:(UIImage *)image 
{ 
    UIImageView *imageView = [[UIImageView alloc] initWithFrame:CGRectMake(0,0,320,480)]; 
    imageView.backgroundColor = [UIColor colorWithPatternImage:image]; 
    [self.view addSubview:imageView]; 
    [self.view sendSubviewToBack:imageView]; 
    [self.view setOpaque:NO]; 
    [self.view setBackgroundColor:[UIColor clearColor]]; 
} 

另一種方式（圖像方式僅:)）：

UIImage *tabBarBackground = [UIImage imageNamed:@"tabBarBackground.png"]; 
[[UITabBar appearance] setBackgroundImage:tabBarBackground]; 
[[UITabBar appearance] setSelectedImageTintColor:[UIColor colorWithRed:127.0/255.0 green:186.0/255.0 blue:235.0/255.0 alpha:1.0]]; 
[[UITabBar appearance] setSelectionIndicatorImage:[UIImage imageNamed:@"tabBarItemSelected.png"]];