Completely transparent UITabBar in iOS 8

问题

I'm trying to make my tabBar transparent, I've searched but all I found was articles resulting in partly and not fully transparent tabBars and some were for IOS 5, etc.

I would like to accomplish this as seen in Sketch 3:

What's the easiest way to accomplish this?

I thought of doing this:

    // Make the tabBar transparent
self.tabBarController.tabBar.backgroundColor = [UIColor clearColor];
self.tabBarController.tabBar.translucent = YES;

but that result wasn't exactly perfect:

Really appreciate help!:)

Sincerely, Erik

Update

// Make the tabBar transparent
[[UITabBar appearance] setBarTintColor:[UIColor clearColor]];
self.tabBarController.tabBar.translucent = YES;

回答1:

Have you tried the barTintColor?

[[UITabBar appearance] setBarTintColor:[UIColor clearColor]];
[[UITabBar appearance] setBackgroundImage:[UIImage new]];

That should do the trick.

回答2:

Swift 3.0

... call this code in the AppDelegate's didFinishLaunchingWithOptions

let tabBar = UITabBar.appearance()
tabBar.barTintColor = UIColor.clear
tabBar.backgroundImage = UIImage()
tabBar.shadowImage = UIImage()

The result will be a transparent background for every UITabBar.

回答3:

You need to subclass the UITabBarController and in the viewdidload: you should put this code:

CGRect rect = CGRectMake(0, 0, 1, 1);
UIGraphicsBeginImageContextWithOptions(rect.size, NO, 1.0);
CGContextRef context = UIGraphicsGetCurrentContext();
CGContextSetFillColorWithColor(context, [UIColor clearColor].CGColor);
CGContextFillRect(context, rect);
UIImage *transparentImage = UIGraphicsGetImageFromCurrentImageContext();
UIGraphicsEndImageContext();
[self.tabBar setBackgroundImage:transparentImage];
[self.tabBar setShadowImage:transparentImage];    
//    self.tabBar.alpha = 0.0;

回答4:

This easy solution fixed my problem:

let size = CGSize(width: tabBar.bounds.size.width,
                      height: tabBar.bounds.size.height)
tabBar.backgroundImage = UIImage.jotImage(with: UIColor.clear, size: size)

来源：https://stackoverflow.com/questions/26279478/completely-transparent-uitabbar-in-ios-8