How to get URL image in UIImagepickercontroller

问题

I want to get URL image in UIImagepickercontroller after take picture. I used following codes in didFinishPickingMedia..

 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];

But in console print (null)

Can you show me ? Thanks

回答1:

Image picker has two success delegate methods as follow:

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

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

It seemed to me that you are using the first method (You didn't mentioned the method but I thought to let you know). In this case you have to change your implementation to the second method.

For accessing UIImage and storing it to some path use as follow:

- (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];
}

Hope this helps you :)

来源：https://stackoverflow.com/questions/17273446/how-to-get-url-image-in-uiimagepickercontroller

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iphone

ios

objective-c

url

uiimagepickercontroller