问题描述：

相册选择照片scrollView向上偏移，导致照片被导航栏遮挡。

解决办法：

设置导航栏不透明即可。

UIImagePickerController *picker = [[UIImagePickerController alloc] init];
    
picker.sourceType = UIImagePickerControllerSourceTypePhotoLibrary;
    
picker.delegate = self;
    
//解决照片被导航栏遮挡的偏移问题
picker.navigationBar.translucent = NO;
    
picker.allowsEditing = NO;
    
[self presentViewController:picker animated:YES completion:nil];