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我使用MFMailComposeViewController在iPhone上創建eMails。這些郵件包括文本，文本附件和一些圖像附件。MFMailComposeViewController在圖像附件前生成空行
if ([MFMailComposeViewController canSendMail]) {
mailController = [[MFMailComposeViewController alloc] init];
[mailController setToRecipients:recipients];
if ([ccRecipients count] > 0) [mailController setCcRecipients:ccRecipients];
[mailController setSubject:project];
[mailController setMessageBody:message isHTML:NO];
if (csv) {
[mailController addAttachmentData:csvData mimeType:@"text/csv" fileName:csvFileName];
}
QEMailAddPicturesOperation * operation = [[QEMailAddPicturesOperation alloc] init];
operation.delegate = self;
NSOperationQueue *queue = [[NSOperationQueue alloc] init];
[queue addOperation:operation];
}
@implementation QEMailAddPicturesOperation
- (void) main {
....
for (NSString * fileName in listOfPictures) {
NSString * path = [directory stringByAppendingPathComponent:fileName];
NSData * imageData = UIImageJPEGRepresentation([UIImage imageWithContentsOfFile:path], PIC_COMPRESSION_RATE);
[mailController addAttachmentData:imageData mimeType:@"image/jpg" fileName:fileName];
}
}
所有工作正常，我可以發送郵件。 但結果是：
Content-Type: multipart/mixed; boundary=Apple-Mail-256A861D-10BB-4031-8DFB-0E8FDA8F9337
....
Content-Transfer-Encoding: 7bit
Mime-Version: 1.0 (1.0)
X-Mailer: iPhone Mail (9A405)
....
--Apple-Mail-256A861D-10BB-4031-8DFB-0E8FDA8F9337
Content-Transfer-Encoding: 7BIT
Content-Type: TEXT/plain;
charset=us-ascii
--Apple-Mail-256A861D-10BB-4031-8DFB-0E8FDA8F9337
Content-Disposition: inline;
filename=MFA_001.JPG
Content-Type: IMAGE/jpg;
....
你看郵件撰寫放附後（和採用base64編碼）圖像之間的若干文本行。
Outlook 2010將這些行解釋爲附件（ATT ......）。例如，發送8個圖像會在Outlook中創建8個附加但空的附件。 Outlook還將iPhone郵件的簽名顯示爲附件。 Mac上的Outlook 2011工作。
如何避免在iPhone上創建空行或在Outlook（2007,2010）中創建附件？