iOS开发之上传pdf格式文件

- (void)presentDocumentPicker {
    NSArray *types = @[@"com.adobe.pdf"]; // 可以选择的文件类型,下面有关于type的解释
    UIDocumentPickerViewController *documentPicker = [[UIDocumentPickerViewController alloc] initWithDocumentTypes:types inMode:UIDocumentPickerModeOpen];
    documentPicker.delegate = self;//(UIDocumentPickerDelegate)
    documentPicker.modalPresentationStyle = UIModalPresentationFullScreen;
    [self presentViewController:documentPicker animated:YES completion:nil];
}

#pragma mark - UIDocumentPickerDelegate

- (void)documentPicker:(UIDocumentPickerViewController *)controller didPickDocumentsAtURLs:(NSArray *)urls {
    //获取授权
    BOOL fileUrlAuthozied = [urls.firstObject startAccessingSecurityScopedResource];
    if (fileUrlAuthozied) {
        //通过文件协调工具来得到新的文件地址，以此得到文件保护功能
        NSFileCoordinator *fileCoordinator = [[NSFileCoordinator alloc] init];
        NSError *error;

        [fileCoordinator coordinateReadingItemAtURL:urls.firstObject options:0 error:&error byAccessor:^(NSURL *newURL) {
            //读取文件
            NSString *fileName = [newURL lastPathComponent];
            NSError *error = nil;
            NSData *fileData = [NSData dataWithContentsOfURL:newURL options:NSDataReadingMappedIfSafe error:&error];
            if (error) {
                //读取出错
                [self showError:@"读取出错"];
            } else {
                //上传
                NSLog(@"fileData --- %@",fileData);
//                [self uploadingWithFileData:fileData fileName:fileName fileURL:newURL];
            }
            [self dismissViewControllerAnimated:YES completion:NULL];
        }];
        [urls.firstObject stopAccessingSecurityScopedResource];
    } else {
        //授权失败
        [self showError:@"授权失败"];
    }
}

需要哪种类型传入该类型的字符串即可
"com.microsoft.powerpoint.​ppt",
"com.microsoft.word.doc",
"com.microsoft.excel.xls",
"com.microsoft.powerpoint.​pptx",
"com.microsoft.word.docx",
"com.microsoft.excel.xlsx",
"public.avi",
"public.3gpp",
"public.mpeg-4",
"com.compuserve.gif",
"public.jpeg",
"public.png",
"public.plain-text",
"com.adobe.pdf"

关于传入类型的文档解释