Ios 将图像保存到 Documents 目录并检索邮箱附件

我在计算NSBundle&amp；DocumentDirectory数据时遇到困难，我有一张相机图片"imageView"，我正将其保存到NSDocumentDirectoy，然后想要检索它以附加到邮箱中，

下面是保存代码:

- (IBAction)saveImage {
    NSArray *paths = NSSearchPathForDirectoriesInDomains(NSDocumentDirectory, NSUserDomainMask, YES);
    NSString *documentsDirectory = [paths objectAtIndex:0];
    NSString *savedImagePath = [documentsDirectory stringByAppendingPathComponent:@"savedImage.png"];
    UIImage *image = imageView.image; // imageView is my image from camera
    NSData *imageData = UIImagePNGRepresentation(image);
    [imageData writeToFile:savedImagePath atomically:NO];   
}

下面是新的获取数据代码:

    NSArray *paths = NSSearchPathForDirectoriesInDomains(NSDocumentDirectory, NSUserDomainMask, YES);
    NSString *documentsDirectory = [paths objectAtIndex:0];
    NSString *appFile = [documentsDirectory stringByAppendingPathComponent:@"savedImage.png"];
    NSData *myData = [[[NSData alloc] initWithContentsOfFile:appFile] autorelease];
    [picker addAttachmentData:myData mimeType:@"image/png" fileName:@"savedImage"];