resizing an uiimage before writing it to documents directory

Question

I have a question.I need to resize the image when I take an image using camera and picking the image from the photo library using uiimagepickercontroller and then write that resized image to the documents directory. So please help me with some reference on how to resize an uiimage.

Answer 1

Use the following:

UIGraphicsBeginImageContext(newSize);
[image drawInRect:CGRectMake(0, 0, newSize.width, newSize.height)];
UIImage *newImage = UIGraphicsGetImageFromCurrentImageContext();    
UIGraphicsEndImageContext();
NSString *path = [[NSSearchPathForDirectoriesInDomains(NSDocumentDirectory, NSUserDomainMask, YES) objectAtIndex:0] stringByAppendingPathComponent:@"resizedImage.jpg"];
[UIImageJPGRepresentation(newImage, 1.0) writeToFile:path atomically:YES];

Answer 2

您可以使用Trevor的库获得更多效果，不仅可以调整大小-正确调整图像大小