设置导航栏背景和文字属性

 1 //设置导航栏背景
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 3 UIImage *image = [UIImage resizeImage:@"navigationbar_background.png"];
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 5 [[UINavigationBar appearance] setBackgroundImage:image forBarMetrics:UIBarMetricsDefault];
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 7  
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 9 NSMutableDictionary *attrs = [NSMutableDictionary dictionary]; //设置导航栏文字属性
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11 [attrs setObject:[UIColor blackColor] forKey: UITextAttributeTextColor]; //设置文字颜色
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13 [[UINavigationBar appearance] setTitleTextAttributes: attrs];