UIActivityViewController通过电子邮件共享图像没有扩展名 [英] UIActivityViewController sharing image via email has no extension

问题描述

附加的图片只是附件-1，没有扩展名。如何指定一个？

The image attached is just "Attachment-1", no extension. How do I specify one ?

    NSData *compressedImage = UIImageJPEGRepresentation(self.resultImage, 0.8 );

    UIActivityViewController *activityViewController = [[UIActivityViewController alloc] initWithActivityItems:@[ @"Check this out!", compressedImage ] applicationActivities:nil];

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

推荐答案

根据此答案您应该能够使用此解决方法指定文件名。

According to this answer you should be able to use this workaround to specify a filename

NSData *compressedImage = UIImageJPEGRepresentation(self.resultImage, 0.8 );
NSString *docsPath = [NSSearchPathForDirectoriesInDomains(NSDocumentDirectory, NSUserDomainMask, YES) objectAtIndex:0];
NSString *imagePath = [docsPath stringByAppendingPathComponent:@"image.jpg"];
NSURL *imageUrl     = [NSURL fileURLWithPath:imagePath];

[compressedImage writeToURL:imageUrl atomically:YES]; // save the file
UIActivityViewController *activityViewController = [[UIActivityViewController alloc] initWithActivityItems:@[ @"Check this out!", imageUrl ] applicationActivities:nil];

这种方法的明显缺点是您必须将映像保存在磁盘上。

The obvious drawback of this approach is that you will have to save the image on disk.

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