我正在尝试使用 UIActivityViewController 发送 PDF 文件。到目前为止，使用相当基本的方法一切都运行正常，但唯一的问题是当我选择通过邮件发送时，PDF 文件名为 Attachment-1 而不是我给文件的名称 Calculation.PDF。
我不太在意标题的更改，但缺少 .pdf 扩展名似乎会在将文件发送给 Windows PC 的人时引起问题，因此我想解决这个问题。
我查看了以下链接： Control file name of UIImage send with UIActivityViewController
但是找不到一个等效的方法来：
[mailComposer addAttachmentData: UIImagePNGRepresentation(viewImage) mimeType:@"" fileName:@"myImage.png"];
那将能够与PDF文件一起使用。如果没有定制，这是否是无法修复的问题，还是有一个简单的解决方案？
试试这个
NSData *pdfData = [NSData dataWithContentsOfFile:pdfFilePath];
UIActivityViewController *activityViewController = [[UIActivityViewController alloc] initWithActivityItems:@[@"Test", pdfData] applicationActivities:nil];
[self presentViewController:activityViewController animated:YES completion:nil];
并且也
NSString *str = [[NSBundle mainBundle] pathForResource:@"AppDistributionGuide" ofType:@"pdf"];
UIActivityViewController *activityViewController = [[UIActivityViewController alloc] initWithActivityItems:@[@"Test", [NSURL fileURLWithPath:str]] applicationActivities:nil];
Swift
let url = NSURL.fileURLWithPath(fileName)
let activityViewController = UIActivityViewController(activityItems: [url] , applicationActivities: nil)
presentViewController(activityViewController, animated: true, completion: nil)
这里附加了代码。我只是在呈现“activityViewController”之前添加了线程处理，因为此视图控制器在加载实际数据之前呈现。
let url = NSURLfileURL(withPath:fileName)
let activityViewController = UIActivityViewController(activityItems: [url] , applicationActivities: nil)
DispatchQueue.main.async {
self.present(activityViewController, animated: true, completion: nil)
}
以上关于Swift的列表在Swift 3中已被弃用
let url = NSURL.fileURL(withPath: fileName)
let activityViewController = UIActivityViewController(activityItems: [url] , applicationActivities: nil)
present(activityViewController,
animated: true,
completion: nil)
用于 Objective-C 测试代码共享 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;
}
下面是调用函数的方式
[self downloadPDFfile:@"yourFileName" withFileURL:shareURL];
针对Swift 3
您需要使用一个包含所需发送的PDF文件路径的URL数组。
let urlArray = [pdfPath1, pdfPath2]
UIActivityViewController:let activityController = UIActivityViewController(activityItems: urlArray, applicationActivities: nil)
如果您正在使用UIBarButtonItem来执行该操作，您可以实现以下代码以防止在iPad上出现错误：
if let popover = activityController.popoverPresentationController {
popover.barButtonItem = self.barButtonItem
}
最后，您需要展示activityController：
self.present(activityController, animated: true, completion: nil)
@[@"Test"并只传递pdfData，则会创建一个附件。NSData *pdfData = [NSData dataWithContentsOfFile:pdfFilePath];
UIActivityViewController *activityViewController = [[UIActivityViewController alloc] initWithActivityItems:pdfData applicationActivities:nil];
[self presentViewController:activityViewController animated:YES completion:nil];
或许可以试试这个...
#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;
}