从iPhone相机捕获图像或从库中获取图像，如何获取图像捕获时间？

Question

我正在开发iphone应用程序，对图像w.r.t图像捕获时间进行排序。

如何获取图像捕获时间？

感谢。

Answer 1

- (void) imagePickerController: (UIImagePickerController *) picker
 didFinishPickingMediaWithInfo: (NSDictionary *) info {
    NSDictionary *metadata = [[NSDictionary alloc] initWithDictionary:[info objectForKey:UIImagePickerControllerMediaMetadata]];
    NSDictionary *exifData = [[NSDictionary alloc] initWithDictionary:[metadata objectForKey:@"{Exif}"]];
    NSString *captureDate = [exifData objectForKey:@"DateTimeOriginal"];

    NSLog(@"Date: %@", captureDate);
}

结果： 日期：2013：11：07 15:19:45