我想从文件列表中导入文件。我使用 UIDocumentMenuViewController 来显示和选择文件。打开iCloud时它显示空白屏幕。
我创建了 UIDocumentMenuViewController 来显示所有类型的文件。
UIDocumentMenuViewController *documentPickerMenu = [[UIDocumentMenuViewController alloc]
initWithDocumentTypes:@[@"public.item"]
inMode:UIDocumentPickerModeImport];
documentPickerMenu.delegate = self;
[self presentViewController:documentPickerMenu animated:YES completion:nil];
我已经实现了委托方法。
- (void)documentMenu:(UIDocumentMenuViewController *)documentMenu didPickDocumentPicker:(UIDocumentPickerViewController *)documentPicker{
documentPicker.delegate = self;
[self presentViewController:documentPicker animated:YES completion:nil]; }
- (void)documentPicker:(UIDocumentPickerViewController *)controller didPickDocumentAtURL:(NSURL *)url {
if (controller.documentPickerMode == UIDocumentPickerModeImport)
{
// Condition called when user download the file
NSData *fileData = [NSData dataWithContentsOfURL:url];
// NSData of the content that was downloaded - Use this to upload on the server or save locally in directory
//Showing alert for success
dispatch_async(dispatch_get_main_queue(), ^{
NSString *alertMessage = [NSString stringWithFormat:@"Successfully downloaded file %@", [url lastPathComponent]];
UIAlertController *alertController = [UIAlertController
alertControllerWithTitle:@"UIDocumentView"
message:alertMessage
preferredStyle:UIAlertControllerStyleAlert];
[alertController addAction:[UIAlertAction actionWithTitle:@"Ok" style:UIAlertActionStyleDefault handler:nil]];
[self presentViewController:alertController animated:YES completion:nil];
});
} }
我在 iCloud 上有图像。我通过创建 UIDocumentPickerViewController 而不是 UIDocumentMenuViewController 尝试了同样的事情，但同样的问题。我无法确定问题任何人都知道吗？