[iPhone] image Size 조정

Image Size 조정

 

1. header에 정의

- (UIImage *)scaleToSize:(UIImage *)img;

 

2. model 부분에 함수 정의

- (UIImage *)scaleToSize:(UIImage *)img {

    float resizeWidth = 330.0;

    float resizeHeight = 430.0;

 

    UIGraphicsBeginImageContext(CGSizeMake(resizeWidth, resizeHeight);
 
    CGContextRef context = UIGraphicsGetCurrentContext();
    CGContextTranslateCTM(context, 0.0, resizeHeight);
    CGContextScaleCTM(context, 1.0, -1.0);

    CGContextDrawImage(context, CGRectMake(0.0f, 0.0f, resizeWidth, resizeHeight), img.CGImage);

    UIImage* scaledImage = UIGraphicsGetImageFromCurrentImageContext();
 
    UIGraphicsEndImageContext();
 
    return scaledImage;

}

 

3. 데이터 넘기기

UIImage * temp = [UIImage imageNamed:@"hello.png"];

UIImage *scaledImage = [self scaleToSize:temp];

 

참고 사이트

- http://developers.enormego.com/view/uiimage_resizing_scaling

- http://theeye.pe.kr/entry/how-to-resize-image-on-iPhone-development