在目标 c 中将文件作为附件发送 [英] Send a file as attachment in objective c

问题描述

我想通过从图像选择器中选取一个文件(图像)作为附件进行邮寄.在 iOS Objective-C 中附加和邮寄文件(特别是图像)的合适方式是什么?

I want to mail a file (image) as an attachment by just picking it from an Image Picker. What is the appropriate way I can attach and mail a file (specifically, an image) in iOS Objective-C?

推荐答案

使用下面的方法

-(void)displayComposerSheet 
{
    MFMailComposeViewController *picker = [[MFMailComposeViewController alloc] init];
    picker.mailComposeDelegate = self;
    [picker setSubject:@"Check out this image!"];

    // Set up recipients
    // NSArray *toRecipients = [NSArray arrayWithObject:@"[e-mail]"]; 
    // NSArray *ccRecipients = [NSArray arrayWithObjects:@"[e-mail]", @"[e-mail]", nil]; 
    // NSArray *bccRecipients = [NSArray arrayWithObject:@"[e-mail]"]; 

    // [picker setToRecipients:toRecipients];
    // [picker setCcRecipients:ccRecipients];   
    // [picker setBccRecipients:bccRecipients];

    // Attach an image to the email
    UIImage *coolImage = ...;
    NSData *myData = UIImagePNGRepresentation(coolImage);
    [picker addAttachmentData:myData mimeType:@"image/png" fileName:@"coolImage.png"];

    // Fill out the email body text
    NSString *emailBody = @"My cool image is attached";
    [picker setMessageBody:emailBody isHTML:NO];
    [self presentModalViewController:picker animated:YES];

    [picker release];
}

并实现委托方法

- (void)mailComposeController:(MFMailComposeViewController*)controller didFinishWithResult:(MFMailComposeResult)result error:(NSError*)error 
{   
    // Notifies users about errors associated with the interface
    switch (result)
    {
        case MFMailComposeResultCancelled:
            NSLog(@"Result: canceled");
            break;
        case MFMailComposeResultSaved:
            NSLog(@"Result: saved");
            break;
        case MFMailComposeResultSent:
            NSLog(@"Result: sent");
            break;
        case MFMailComposeResultFailed:
            NSLog(@"Result: failed");
            break;
        default:
            NSLog(@"Result: not sent");
            break;
    }
    [self dismissModalViewControllerAnimated:YES];
}

在你的界面文件中

#import <MessageUI/MFMailComposeViewController.h>
...

@interface ... : ... <MFMailComposeViewControllerDelegate>

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