UIImagePickerController iOS11调起相

为了适配iOS11下来刷新下下偏移问题，全局设置了 [UIScrollView appearance] 的ContentInsetAdjustmentBehavior为UIScrollViewContentInsetAdjustmentNever导致ScrollView向上偏移了，而在iOS11以下却没问题

if (@available(iOS 11.0, *)){

        [[UIScrollView appearance] setContentInsetAdjustmentBehavior:UIScrollViewContentInsetAdjustmentNever];

    }

解决办法:将导航条的毛玻璃效果去除掉就可以了

 UIImagePickerController *pickerController = [[UIImagePickerController alloc] init];

    pickerController.editing = YES;

    pickerController.delegate = self;

    pickerController.allowsEditing = YES;

//    去除毛玻璃效果

    pickerController.navigationBar.translucent = NO;

    pickerController.sourceType=UIImagePickerControllerSourceTypePhotoLibrary;

    [self presentViewController:pickerController animated:YES completion:nil];