iCloud 选择文件功能
1: 在扩展功能板的点击回调代理方法中判断如果tag是PLUGIN_BOARD_ITEM_FILE_TAG 则拦截，会话页面重写如下方法：
- (void)pluginBoardView:(RCPluginBoardView *)pluginBoardView
clickedItemWithTag:(NSInteger)tag;
2:调用如下方法唤起 iCloud 选择界面：
// 根据需求添加具体文件格式
NSArray *documentTypes = @[@"public.content",
@"public.text",
@"public.source-code",
@"public.image",
@"public.audiovisual-content",
@"com.adobe.pdf",
@"com.apple.keynote.key",
@"com.microsoft.word.doc",
@"com.microsoft.excel.xls",
@"com.microsoft.powerpoint.ppt"];
UIDocumentPickerViewController *documentPicker = [[UIDocumentPickerViewController alloc] initWithDocumentTypes:documentTypes inMode:UIDocumentPickerModeImport];
documentPicker.delegate = self;
documentPicker.modalPresentationStyle = UIModalPresentationFullScreen;
[self presentViewController:documentPicker animated:YES completion:nil];
3:选择完文件后调用如下方法发出消息：
#pragma mark - UIDocumentPickerDelegate
-(void)documentPicker:(UIDocumentPickerViewController *)controller didPickDocumentAtURL:(NSURL *)url {
NSFileCoordinator *coordinator = [[NSFileCoordinator alloc] initWithFilePresenter:nil];
NSError *error = nil;
[coordinator coordinateReadingItemAtURL:url options:0 error:&error byAccessor:^(NSURL *newURL) {
NSData *data = [NSData dataWithContentsOfURL:newURL];
if (data.length <= 0) {
UIAlertController *alertCtrl = [UIAlertController alertControllerWithTitle:RCEStringFor(@"not_allow_empty") message:nil preferredStyle:UIAlertControllerStyleAlert];
UIAlertAction *confirmAction = [UIAlertAction actionWithTitle:RCEStringFor(@"confirm_btn_title") style:(UIAlertActionStyleDefault) handler:^(UIAlertAction * _Nonnull action) {
}];
[alertCtrl addAction:confirmAction];
[self presentViewController:alertCtrl animated:YES completion:nil];
return;
}
RCFileMessage *fileMsg = [RCFileMessage messageWithFile:[newURL path]];
[self sendMessage:fileMsg pushContent:nil];
[controller dismissViewControllerAnimated:YES completion:nil];
}];
if (error) {
NSLog(@"ERROR: read data with "DocumentAtURL" failed");
}
}
注意：App 需要在 Capabilities 中开启 iCloud Documents 功能。