UITabbar 相关属性设置

背景颜色的设置

NSString *tabbarBackgroundImage = [[NSBundle mainBundle] pathForResource:@"bg_tabbar@2x" ofType:@"png"];
    [[UITabBar appearance] setBackgroundImage:[UIImage imageWithContentsOfFile:tabbarBackgroundImage]];
tabbar选择后的背景设置（这里由于图片的大小，做了一下图片的大小调整）

UIImage *image = [UIImage imageWithContentsOfFile:tabbarBackgroundImage];
CGSize size = CGSizeMake(20.0, 0.5);
UIImage *resizeImage = [self reSizeImage:image toSize:size];
[[UITabBar appearance] setSelectionIndicatorImage:resizeImage];

tabbar字体的颜色设置

[[UITabBarItem appearance] setTitleTextAttributes:[NSDictionary dictionaryWithObjectsAndKeys:[UIColor grayColor],UITextAttributeTextColor, nil] forState:UIControlStateNormal];

加一个图片重新调整的函数

- (UIImage *)reSizeImage:(UIImage *)image toSize:(CGSize)reSize
{
    UIGraphicsBeginImageContext(CGSizeMake(reSize.width, reSize.height));
    [image drawInRect:CGRectMake(0, 0, reSize.width, reSize.height)];
    UIImage *reSizeImage = UIGraphicsGetImageFromCurrentImageContext();
    UIGraphicsEndImageContext();
    
    return reSizeImage;
    
}