如何修改UIImagePickerViewController的导航栏背景颜色及取消按钮颜色

本文介绍: 如题所示，最近，项目里面需要我对系统自带的UIIm a g ePic k e rViewCon t roll e r 选择图片控制器的导航栏做个性化的定义。查找了一下，发现网上部分方法通常为全局修改，并不适合我这个案例。避免了全局统一修改，只针对UIIm a gePic kerViewCon t roller这个类别的控制器。特此记录下有效代码。…

如题所示，最近，项目里面需要我对系统自带的UIIm a gePic kerViewCon t r oller选择图片控制器的导航栏做个性化的定义。

查找了一下，发现网上部分方法通常为全局修改，并不适合我这个案例。

- (void)navigationController:(UINavigationController *)navigationController willShowViewController:(UIViewController *)viewController animated:(BOOL)animated {
    if ([navigationController isKindOfClass:[UIImagePickerController class]]) {
//设置导航栏背景色
     if ([[UIDevice currentDevice] systemVersion].floatValue &gt;= 8.0) {
      [viewController.navigationController.navigationBar setBarTintColor:[UIColor whiteColor]];
     } else {
      [viewController.navigationController.navigationBar setBackgroundImage:[UIImage imageWithColor:UIColor.whiteColor] forBarMetrics:UIBarMetricsDefault];
     }
//设置右边取消按钮颜色
        UIButton *btn = [[UIButton alloc]initWithFrame:CGRectMake(0, 0, 60, 44)];
        [btn setTitle:@"取消" forState:UIControlStateNormal];
        [btn setTitleColor:kMainColor forState:UIControlStateNormal];
        [btn addTarget:self action:@selector(backToParent) forControlEvents:UIControlEventTouchUpInside];
        UIBarButtonItem *right = [[UIBarButtonItem alloc]initWithCustomView:btn];

        dispatch_after(dispatch_time(DISPATCH_TIME_NOW, (int64_t)(0.01 * NSEC_PER_SEC)), dispatch_get_main_queue(), ^{
            [viewController.navigationItem setRightBarButtonItem:right animated:YES];
        });
        viewController.edgesForExtendedLayout = UIRectEdgeNone;

    }
}

-(void)backToParent {
    [self.picker dismissViewControllerAnimated:YES completion:nil];
}