UIImage load Memory

ref:http://stackoverflow.com/questions/15439564/simple-resizing-of-uiimage-in-xcode


UIImage 讀取方式有以下兩種

UIImage *img = [UIImage imageNamed:@"test.png"]; // caching


UIImage *img = [UIImage imageWithContentsOfFile:@"test.png"]; // no caching


如果還是一樣大，還是改變你的尺寸吧一m一+

- (UIImage*)resizeImage:(UIImage *)image

{

    CGSize origImageSize = [image size];

    CGRect newRect = self.view.frame; //新的frame，要改的size

    float ratio = MAX(newRect.size.width / origImageSize.width,

                      newRect.size.height / origImageSize.height);

    UIGraphicsBeginImageContextWithOptions(newRect.size, NO, 0.0);

    UIBezierPath *path = [UIBezierPath bezierPathWithRoundedRect:newRect

                                                    cornerRadius:5.0];

    [path addClip];

    CGRect imageRect;

    imageRect.size.width = ratio * origImageSize.width;

    imageRect.size.height = ratio * origImageSize.height;

    imageRect.origin.x = (newRect.size.width - imageRect.size.width) / 2.0;

    imageRect.origin.y = (newRect.size.height - imageRect.size.height) / 2.0;

    [image drawInRect:imageRect];

    UIImage *smallImage = UIGraphicsGetImageFromCurrentImageContext();

    UIGraphicsEndImageContext();

    

    return smallImage;

}