iphone - 将 2 个 UIImage 添加到一个 UIImage

Question

我正在将 2 张图片相互添加，想知道这是否是一个好方法？这段代码有效并且看起来很强大。

所以，我的问题真的是，这样好还是有更好的方法？

PS:设计者写的警告代码。

调用函数:

- (IBAction) {
    UIImage *MyFirstImage = UIImage imageNamed: @"Image.png"];
    UIImage *MyTopImage = UIImage imageNamed: @"Image2.png"];
    CGFloat yFloat = 50;
    CGFloat xFloat = 50;
    UIImage  *newImage =   [self placeImageOnImage:MyFirstImage imageOver:MyTopImage x:&xFloat y:&yFloat];
}

函数:

- (UIImage*) placeImageOnImage:(UIImage *)image topImage:(UIImage *)topImage x:(CGFloat *)x y:(CGFloat *)y {    
    // if you want the image to be added next to the image make this CGSize bigger.  
    CGSize newSize = CGSizeMake(image.size.width,image.size.height); 

    UIGraphicsBeginImageContext( newSize );
    [topImage drawInRect:CGRectMake(*x,*y,topImage.size.width,topImage.size.height)];
    [image drawInRect:CGRectMake(0,0,newSize.width,newSize.height) blendMode:kCGBlendModeDestinationOver alpha:1];
    UIImage *newImage = UIGraphicsGetImageFromCurrentImageContext();
    UIGraphicsEndImageContext();
    return newImage;
}

Answer 1

看起来不错。也许您并不真的需要 CGFloat 指针，但这也没关系。