是! 最后，我做了一个技巧来修改EXIF信息。首先，您可以通过UIImageJPEGRepresentation从info [UIImagePickerControllerMediaMetadata]和NSData中获取EXIF信息，而无需从EXImage中获取NSData。然后，您可以使用修改后的EXIF信息创建一个新的NSDictionary。之后，在下面调用我的函数，就可以使用修改后的EXIF获取图像NSData！
func saveImageWithImageData(data: NSData, properties: NSDictionary, completion: (data: NSData, path: NSURL) -> Void) {
let imageRef: CGImageSourceRef = CGImageSourceCreateWithData((data as CFDataRef), nil)!
let uti: CFString = CGImageSourceGetType(imageRef)!
let dataWithEXIF: NSMutableData = NSMutableData(data: data)
let destination: CGImageDestinationRef = CGImageDestinationCreateWithData((dataWithEXIF as CFMutableDataRef), uti, 1, nil)!
CGImageDestinationAddImageFromSource(destination, imageRef, 0, (properties as CFDictionaryRef))
CGImageDestinationFinalize(destination)
var paths: [AnyObject] = NSSearchPathForDirectoriesInDomains(.DocumentDirectory, .UserDomainMask, true)
let savePath: String = paths[0].stringByAppendingPathComponent("exif.jpg")
let manager: NSFileManager = NSFileManager.defaultManager()
manager.createFileAtPath(savePath, contents: dataWithEXIF, attributes: nil)
completion(data: dataWithEXIF,path: NSURL(string: savePath)!)
print("image with EXIF info converting to NSData: Done! Ready to upload! ")
}
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