统一设置导航栏的皮肤颜色

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+ (void)initialize{

    UINavigationBar *bar = [UINavigationBar appearance];

//    [self buttonImageFromColor:[UIColor blackColor]]

    UIImage *image = [UIImage imageNamed:@"img_nav_topbar"];

    [bar setBackgroundImage:image forBarMetrics:UIBarMetricsDefault];

    // 设置uibarbuttonitem统一为白色

    UIBarButtonItem *item = [UIBarButtonItem appearance];

    NSMutableDictionary *attributes = [NSMutableDictionary dictionary];

    attributes[NSForegroundColorAttributeName] = [UIColor whiteColor];

    [item setTitleTextAttributes:attributes forState:UIControlStateNormal];

    // 设置导航栏返回按钮的颜色

    [bar setTintColor:[UIColor whiteColor]];

    // 导航栏设置黑色后，标题设置白色

    NSMutableDictionary *dic = [NSMutableDictionary dictionary];

    dic[NSForegroundColorAttributeName] = [UIColor whiteColor];

    [bar setTitleTextAttributes:dic];

}

统一设置导航栏的皮肤颜色

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原文地址：http://www.cnblogs.com/-boy/p/4456493.html