Image resize

function generateSmallThumb (imagePath) {
    var image = [UIImage imageNamed:imagePath];
    rect = {0:{0:0,1:124},1:{0:0,1:124}};
    UIGraphicsBeginImageContextWithOptions({width:124, height:124}, NO, 1);
    [image drawInRect:rect];
    var resizedImage = UIGraphicsGetImageFromCurrentImageContext();
    UIGraphicsEndImageContext();
    [UIImagePNGRepresentation(resizedImage) writeToFile:imagePath.replace("@3x","@2x") atomically:YES];
}