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我是相当新的xcode，我目前正在尝试做一个有几个视图控制器的应用程序。我希望其中一个视图控制器将另一个图像（屏幕快照）以PDF格式加载到电子邮件中。视图控制器屏幕拍摄
所以一个视图控制器具有如下代码，以视图
- (void)createPDFfromUIView:(UIView*)aView saveToDocumentsWithFileName:(NSString*)aFilename
{
// Creates a mutable data object for updating with binary data, like a byte array
NSMutableData *pdfData = [NSMutableData data];
// Points the pdf converter to the mutable data object and to the UIView to be converted
UIGraphicsBeginPDFContextToData(pdfData, aView.bounds, nil);
UIGraphicsBeginPDFPage();
CGContextRef pdfContext = UIGraphicsGetCurrentContext();
// draws rect to the view and thus this is captured by UIGraphicsBeginPDFContextToData
[aView.layer renderInContext:pdfContext];
// remove PDF rendering context
UIGraphicsEndPDFContext();
// Retrieves the document directories from the iOS device
NSArray* documentDirectories = NSSearchPathForDirectoriesInDomains(NSDocumentDirectory, NSUserDomainMask,YES);
NSString* documentDirectory = [documentDirectories objectAtIndex:0];
NSString* documentDirectoryFilename = [documentDirectory stringByAppendingPathComponent:aFilename];
// instructs the mutable data object to write its context to a file on disk
[pdfData writeToFile:documentDirectoryFilename atomically:YES];
NSLog(@"documentDirectoryFileName: %@",documentDirectoryFilename);
}
，然后其他视图控制器有希望，它将装载后续代码的瞬间拍摄快速拍摄到电子邮件的正文中，然后发送给任何人。
- (IBAction)showEmail:(id)sender {
// Email Subject
NSString *emailTitle = @"Email Title";
// Email Content
NSString *messageBody = @"";
// To address
NSArray *toRecipents = [NSArray arrayWithObject:@"[email protected]"];
MFMailComposeViewController *mc = [[MFMailComposeViewController alloc] init];
mc.mailComposeDelegate = self;
[mc setSubject:emailTitle];
[mc setMessageBody:messageBody isHTML:NO];
[mc setToRecipients:toRecipents];
[mc setModalTransitionStyle:UIModalTransitionStyleCrossDissolve];
UIImage *myImage = [UIImage imageNamed:@"documentDirectoryFilename.pdf"];
NSData *imageData = UIImagePNGRepresentation(myImage);
[mc addAttachmentData:imageData mimeType:@"image/pdf" fileName:@"documentDirectoryFilename.pdf"];
// Present mail view controller on screen
[self presentViewController:mc animated:YES completion:NULL];
}
- (void) mailComposeController:(MFMailComposeViewController *)controller didFinishWithResult: (MFMailComposeResult)result error:(NSError *)error
{
switch (result)
{
case MFMailComposeResultCancelled:
NSLog(@"Mail cancelled");
break;
case MFMailComposeResultSaved:
NSLog(@"Mail saved");
break;
case MFMailComposeResultSent:
NSLog(@"Mail sent");
break;
case MFMailComposeResultFailed:
NSLog(@"Mail sent failure: %@", [error localizedDescription]);
break;
default:
break;
}
我遇到的问题是，该文件未找到，不会装入邮件成功。任何帮助将不胜感激。