Setting UIToolbar background image with iOS5.1

问题

I used the following code to set the image "Sample" as a background color of my UIToolbar

self.toolbar.layer.contents = (id)[UIImage imageNamed:@"Sample.png"].CGImage;

But it seems the above one does not works with iOS5.1 and the default background color of UIToolbar appeared. I doesn't have any problem with this line in iOS4.

Am I missing something? Please suggest me the reason..

Thanks

回答1:

// Create resizable images
UIImage *gradientImage44 = [[UIImage imageNamed:@"imageName.png"] 
                            resizableImageWithCapInsets:UIEdgeInsetsMake(0, 0, 0, 0)];
// Set the background image for *all* UINavigationBars
[[UIToolbar appearance] setBackgroundImage:gradientImage44 
                                   forBarMetrics:UIBarMetricsDefault];

Better to use appearance API introduced with iOS 5. May this will help you

回答2:

The correct way, which works from the app delegate (unlike the solution above) and which is also marked with UI_APPEARANCE_SELECTOR in the header files, is:

[[UIToolbar appearance] setBackgroundImage:bgImage forToolbarPosition:UIToolbarPositionAny barMetrics:UIBarMetricsDefault];
[[UIToolbar appearance] setBackgroundImage:bgImage forToolbarPosition:UIToolbarPositionAny barMetrics:UIBarMetricsLandscapePhone];

回答3:

setBackgroundImage:forToolbarPosition:barMetrics: this is used to set the image to use for the background in a given position and with given metrics.,

In your case

// Set the background image for PortraitMode
[self.toolbar setBackgroundImage:[UIImage imageNamed:@"Sample.png"] 
                                   forBarMetrics:UIBarMetricsDefault];
// and For LandscapeMode
[self.toolbar setBackgroundImage:[UIImage imageNamed:@"Sample.png"] 
                                   forBarMetrics:UIBarMetricsLandscapePhone];

来源：https://stackoverflow.com/questions/10332040/setting-uitoolbar-background-image-with-ios5-1