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拍照后我想在 UIImagepickercontroller 中获取 URL 图像。我在 didFinishPickingMedia 中使用了以下代码。

 NSData *webData = UIImagePNGRepresentation(image);
NSArray *paths = NSSearchPathForDirectoriesInDomains(NSDocumentDirectory, NSUserDomainMask, YES);
NSString *documentsDirectory = [paths objectAtIndex:0];
NSString *localFilePath = [documentsDirectory stringByAppendingPathComponent:png];
[webData writeToFile:localFilePath atomically:YES];
NSLog(@"localFilePath.%@",localFilePath);

UIImage *image1 = [UIImage imageWithContentsOfFile:localFilePath];

但在控制台打印（空）

能给我看看么 ？谢谢

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1 回答 1

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图像选择器有两种成功委托方法，如下所示：

- (void)imagePickerController:(UIImagePickerController *)picker didFinishPickingImage:(UIImage *)image editingInfo:(NSDictionary *)editingInfo;
// This is Deprecated in ios 3.0

- (void)imagePickerController:(UIImagePickerController *)picker didFinishPickingMediaWithInfo:(NSDictionary *)info;

在我看来，您使用的是第一种方法（您没有提到该方法，但我想让您知道）。在这种情况下，您必须将实现更改为第二种方法。

要访问 UIImage 并将其存储到某个路径，请使用如下：

- (void)imagePickerController:(UIImagePickerController *)picker didFinishPickingMediaWithInfo:(NSDictionary *)info {
    //Zoomed or scrolled image if picker.editing = YES;
    UIImage *editedImage = [info objectForKey:UIImagePickerControllerEditedImage]; 
    // Original Image
    UIImage *OriginalImage = [info objectForKey:UIImagePickerControllerOriginalImage]; 

    // You can directly use this image but in case you want to store it some where
    NSString *docDirPath = [NSSearchPathForDirectoriesInDomains(NSDocumentDirectory, NSUserDomainMask, YES) objectAtIndex:0];
    NSString *filePath =  [docDirPath stringByAppendingPathComponent:@"myImage.png"];
    NSLog (@"File Path = %@", filePath);

    // Get PNG data from following method
    NSData *myData =     UIImagePNGRepresentation(editedImage);
    // It is better to get JPEG data because jpeg data will store the location and other related information of image.
    [myData writeToFile:filePath atomically:YES];

    // Now you can use filePath as path of your image. For retrieving the image back from the path
    UIImage *imageFromFile = [UIImage imageWithContentsOfFile:filePath];
}

希望这可以帮助你:)

于 2013-06-24T11:32:27.253 回答