如何使用 UIActivityViewController 發送 PDF 文件

Question

我正在嘗試使用UIActivityViewController發送 PDF。 到目前為止，使用相當基本的方法一切正常，但我遇到的一個問題是，當我選擇通過郵件發送選項時，PDF 的文件名是Attachment-1而不是Calculation.PDF ，這是我給文件的名稱。

我不太介意標題的變化，但是在將文件發送給使用 Windows PC 的人時，缺少 .pdf 擴展名似乎確實會導致問題，我想解決這個問題。

我看過： Control file name of UIImage send with UIActivityViewController

但看不到等效的方法：

[mailComposer addAttachmentData: UIImagePNGRepresentation(viewImage) mimeType:@"" fileName:@"myImage.png"];

這將適用於 PDF 文件。 這是沒有定制就無法修復的東西，還是有一個簡單的解決方案來解決這個問題？

Answer 1

嘗試這個

NSData *pdfData = [NSData dataWithContentsOfFile:pdfFilePath];
UIActivityViewController *activityViewController = [[UIActivityViewController alloc] initWithActivityItems:@[@"Test", pdfData] applicationActivities:nil];

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

並且

NSString *str = [[NSBundle mainBundle] pathForResource:@"AppDistributionGuide" ofType:@"pdf"];   
UIActivityViewController *activityViewController = [[UIActivityViewController alloc] initWithActivityItems:@[@"Test", [NSURL fileURLWithPath:str]] applicationActivities:nil]; 

Answer 2

迅速

let url = NSURL.fileURLWithPath(fileName)

let activityViewController = UIActivityViewController(activityItems: [url] , applicationActivities: nil)
        
presentViewController(activityViewController, animated: true, completion: nil)

Answer 3

斯威夫特 4.0

在這里我附上了代碼。我只是添加了線程處理來呈現“activityViewController”，因為在加載實際數據之前存在這個視圖控制器。

let url = NSURLfileURL(withPath:fileName)

let activityViewController = UIActivityViewController(activityItems: [url] , applicationActivities: nil)

DispatchQueue.main.async {
            
    self.present(activityViewController, animated: true, completion: nil)
}

Answer 4

上面關於 Swift 的列表在 Swift 3 中已被棄用

let url = NSURL.fileURL(withPath: fileName)

let activityViewController = UIActivityViewController(activityItems: [url] , applicationActivities: nil)

present(activityViewController,
    animated: true,
    completion: nil)

Answer 5

用於通過 Objective-C 測試的代碼共享 PDF

- (void)downloadPDFfile:(NSString *)fileName withFileURL:(NSString *)shareURL {
    dispatch_async(dispatch_get_main_queue(), ^ {
        NSString *documentDir = [NSSearchPathForDirectoriesInDomains(NSDocumentDirectory, NSUserDomainMask, YES) firstObject];
        NSString *filePath = [documentDir stringByAppendingPathComponent:[NSString stringWithFormat:@"/%@",[self generateName:fileName withFiletype:@"pdf"]]];
        NSURLRequest *request = [NSURLRequest requestWithURL:[NSURL URLWithString:shareURL]];
        NSURLSession *session = [NSURLSession sharedSession];
        NSURLSessionDataTask *task = [session dataTaskWithRequest:request
                                                completionHandler:
                                      ^(NSData *data, NSURLResponse *response, NSError *error) {
                                          if (error) {
                                              NSLog(@"Download Error:%@",error.description);
                                          } else if (data && error == nil) {
                                              dispatch_async(dispatch_get_main_queue(), ^{
                                                  [data writeToFile:filePath atomically:YES];
                                                  [self shareFile:fileName withFilepath:filePath];
                                              });
                                          }
                                      }];

        [task resume];
    });
}

-(void)shareFile:(NSString*)withfileName withFilepath:(NSString*)filePath {
    NSMutableArray *items = [NSMutableArray array];

    if (filePath) {
        [items addObject:[NSURL fileURLWithPath:filePath]];
    }

    UIActivityViewController *activityViewController = [[UIActivityViewController alloc] initWithActivityItems:items applicationActivities:nil];
    [activityViewController setValue:withfileName forKey:@"subject"];

    if (UI_USER_INTERFACE_IDIOM() == UIUserInterfaceIdiomPad) {
        activityViewController.modalPresentationStyle = UIModalPresentationPopover;
        UIPopoverPresentationController *popPC = activityViewController.popoverPresentationController;
        popPC.sourceView = self.view;
        CGRect sourceRext = CGRectZero;
        sourceRext.origin = CGPointMake(self.view.frame.size.width-30, 0);
        popPC.sourceRect = sourceRext;
        popPC.permittedArrowDirections = UIPopoverArrowDirectionDown;
    }

    [activityViewController setCompletionWithItemsHandler:
     ^(NSString *activityType, BOOL completed, NSArray *returnedItems, NSError *activityError) {

     }];
    [self presentViewController:activityViewController animated:YES completion:nil];
}

-(NSString*)generateName:(NSString*)title withFiletype:(NSString*)type {
    NSString *subject = [title stringByReplacingOccurrencesOfString:@" " withString:@"_"];
    subject = [NSString stringWithFormat:@"%@.%@",subject,type];
    return subject;
}

調用函數如下

[self downloadPDFfile:@"yourFileName" withFileURL:shareURL];

Answer 6

對於 Swift 3

您必須有一個包含要發送的 PDF 路徑的URL數組。

let urlArray = [pdfPath1, pdfPath2]

然后創建一個UIActivityViewController ：

let activityController = UIActivityViewController(activityItems: urlArray, applicationActivities: nil)

如果您使用UIBarButtonItem來執行該操作，您可以實施此操作以防止在 iPad 上出現錯誤：

if let popover = activityController.popoverPresentationController {
   popover.barButtonItem = self.barButtonItem
}

最后，您必須呈現activityController ：

self.present(activityController, animated: true, completion: nil)

Answer 7

Muruganandham K 的回復簡單而優雅。 但是，它在 iOS 9 中不起作用。為了使其工作，如果您刪除@[@"Test"並只傳遞 pdfData，則會生成一個附件。

NSData *pdfData = [NSData dataWithContentsOfFile:pdfFilePath];
UIActivityViewController *activityViewController = [[UIActivityViewController alloc] initWithActivityItems:pdfData applicationActivities:nil];

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

Answer 8

可以試試這個..

    #define IS_IPAD UI_USER_INTERFACE_IDIOM() == UIUserInterfaceIdiomPad

    // Validate PDF using NSData
    - (BOOL)isValidePDF:(NSData *)pdfData {
        BOOL isPDF = false;
        if (pdfData.length >= 1024 ) {

            int startMetaCount = 4, endMetaCount = 5;
            // check pdf data is the NSData with embedded %PDF & %%EOF
            NSData *startPDFData = [NSData dataWithBytes:"%PDF" length:startMetaCount];
            NSData *endPDFData = [NSData dataWithBytes:"%%EOF" length:endMetaCount];
            // startPDFData, endPDFData data are the NSData with embedded in pdfData
            NSRange startRange = [pdfData rangeOfData:startPDFData options:0 range:NSMakeRange(0, 1024)];
            NSRange endRange = [pdfData rangeOfData:endPDFData options:0 range:NSMakeRange(0, pdfData.length)];

            if (startRange.location != NSNotFound && startRange.length == startMetaCount && endRange.location != NSNotFound && endRange.length == endMetaCount ) {
                // This assumes the checkstartPDFData doesn't have a specific range in file pdf data
                isPDF = true;

            } else  {
                isPDF = false;
            }
        }
        return isPDF;
    }

    // Download PDF file in asynchronous way and validate pdf file formate.
    - (void)downloadPDFfile:(NSString *) fileName withFileURL:(NSString *) url {
        NSString *filePath = @"";
         dispatch_async(dispatch_get_main_queue(), ^ {
            NSString *documentDir = [NSSearchPathForDirectoriesInDomains(NSDocumentDirectory, NSUserDomainMask, YES) firstObject];
            filePath = [documentDir stringByAppendingPathComponent:[NSString stringWithFormat:@"/Attachments/%@",[self generateName:fileName withFiletype:@"pdf"]]];
            NSURLRequest *request = [NSURLRequest requestWithURL:[NSURL URLWithString:url]];
            [NSURLConnection sendAsynchronousRequest:request queue:[NSOperationQueue currentQueue] completionHandler:^(NSURLResponse *response, NSData *data, NSError *error) {
                if (error) {
                        NSLog(@"Download Error:%@",error.description);
                } else if (data && error == nil) {
                    bool checkPdfFormat = [self isValidePDF:data];
                    if (checkPdfFormat) {
                        //saving is done on main thread
                        dispatch_async(dispatch_get_main_queue(), ^{
                            [data writeToFile:filePath atomically:YES];
                            NSURL *url = [NSURL fileURLWithPath:filePath];
                            [self triggerShare:fileName withFilepath:filePath];
                        });
                    }
                }
            }];
        });
    }

    // Trigger default share and print functionality using UIActivityViewController
    -(void) triggerShare:(NSString*)fileName withFilepath:(NSString*)filePath {
            * Set this available field on the activity controller */
            NSMutableArray *items = [NSMutableArray array];

            if (filePath) {
                [items addObject:[NSURL fileURLWithPath:filePath]];
            }

            UIActivityViewController *activityViewController = [[UIActivityViewController alloc] initWithActivityItems:items applicationActivities:nil];
            [activityViewController setValue:fileName forKey:@"subject"]; // Set the mail subject.


            if (IS_IPAD) {
                activityViewController.modalPresentationStyle = UIModalPresentationPopover;
                UIPopoverPresentationController *popPC = activityViewController.popoverPresentationController;
                popPC.sourceView = self.view;
                CGRect sourceRext = CGRectZero;
                sourceRext.origin = CGPointMake(self.view.frame.size.width-30, 0 ); // I have share button in navigation bar. ;)
                popPC.sourceRect = sourceRext;
                popPC.permittedArrowDirections = UIPopoverArrowDirectionUp;
            }


            [activityViewController setCompletionWithItemsHandler:
             ^(NSString *activityType, BOOL completed, NSArray *returnedItems, NSError *activityError) {
             }];
            [self presentViewController:activityViewController animated:YES completion:nil];
    }

    -(NSString*) generateName:(NSString*)title withFiletype:(NSString*)type {

        NSString *subject = [title stringByReplacingOccurrencesOfString:@" " withString:@"_"];
        subject = [NSString stringWithFormat:@"%@.%@",subject,type];
        return subject;
    }