문제 설명
UIImagePickerController에서 이미지 크기 조정이 작동하지 않음 (Resizing an image from UIImagePickerController not working)
I am following this post on how to resize an image. I placed the + (UIImage*)imageWithImage:(UIImage*)image scaledToSize:(CGSize)newSize; in selectExerciseImageViewController.h and copied the relevant code to selectExerciseImageViewController.m.
Then I attempt to resize the image, save it, and retrieve the saved image file into a UIImageView. but for some reason the image is never showing the the UIImageView and the last NSLog returns null
‑ (void)imagePickerController:(UIImagePickerController *)picker didFinishPickingMediaWithInfo:(NSDictionary *)info {
[picker dismissModalViewControllerAnimated:YES];
UIImage* newImage = [selectExerciseImageViewController imageWithImage:[info objectForKey:@"UIImagePickerControllerOriginalImage"]
scaledToSizeWithSameAspectRatio:CGSizeMake(40.0,40.0)];
NSData* imageData = UIImagePNGRepresentation(newImage);
// Give a name to the file
NSString* imageName = @"MyImage.png";
// Now, we have to find the documents directory so we can save it
// Note that you might want to save it elsewhere, like the cache directory,
// or something similar.
NSArray* paths = NSSearchPathForDirectoriesInDomains(NSDocumentDirectory, NSUserDomainMask, YES);
NSString* documentsDirectory = [paths objectAtIndex:0];
// Now we get the full path to the file
NSString* fullPathToFile = [documentsDirectory stringByAppendingPathComponent:imageName];
// and then we write it out
[imageData writeToFile:fullPathToFile atomically:NO];
//imageView.image = [info objectForKey:@"UIImagePickerControllerOriginalImage"];
_testimg.image = [UIImage imageNamed:@"MyImage.png"];
NSLog(@"asd %@",[UIImage imageNamed:@"MyImage.png"]);
}
참조 솔루션
방법 1:
[UIImage imageNamed:@"MyImage.png"];
This loads an image from the main application bundle. You are writing the file to the documents directory. You need to instantiate the UIImage object with a different method. Try:
[UIImage imageWithContentsOfFile:fullPathToFile];
(by Jonathan Thurft、Jim)