實現圖片拼接的iOS代碼

實現將兩個圖像拼接在一起。在使用前需要添加Framework：CoreGraphics.framework

源碼：

    - (UIImage *) combine:(UIImage*)leftImage :(UIImage*)rightImage {  
        CGFloat width = leftImage.size.width * 2;  
        CGFloat height = leftImage.size.height;  
        CGSize offScreenSize = CGSizeMake(width, height);  

        UIGraphicsBeginImageContext(offScreenSize);  

        CGRect rect = CGRectMake(0, 0, width/2, height);  
        [leftImage drawInRect:rect];  

        rect.origin.x += width/2;  
        [rightImage drawInRect:rect];  

        UIImage* imagez = UIGraphicsGetImageFromCurrentImageContext();  

        UIGraphicsEndImageContext();  

        return imagez;  
    }