在 else if 条件中迭代变量？

发布于 2024-12-10 04:53:08 字数 1390 浏览 0 评论 0原文

我正在尝试创建一个 if 语句，其条件取决于变量对象。我该怎么办？

这是我想做的事情的要点...

if ([gestureRecognizer state] == UIGestureRecognizerStateEnded)
{       
    if (somecondition)
    {
        //Do stuff
    }
    else if (CGRectIntersectsRect(currentImage.frame, **anyOfTheImagesInMyArray**.frame))
    {
        //Do stuff
    }   
}

如何在测试 true 或 false 之前让 else if 条件检查多个 UIView 框架？

更新的代码：

在这种情况下我该怎么办？

if ([gestureRecognizer state] == UIGestureRecognizerStateEnded)
{       
    if (CGRectIntersectsRect(currentImage.frame, **anyOfTheImagesInMyArray_1**.frame))
    {
        //Do stuff
    }
    else if (CGRectIntersectsRect(currentImage.frame, **anyOfTheImagesInMyArray_2**.frame))
    {
        if (condition) {
            //do stuff
        }
        else if (condition){
            //do something else
        }
    }   
    else if (CGRectIntersectsRect(currentImage.frame, **anyOfTheImagesInMyArray_3**.frame))
    {
        if (condition) {
            //do stuff
        }
        else if (condition){
            //do something else
        }
    }   
    else if (CGRectIntersectsRect(currentImage.frame, **anyOfTheImagesInMyArray_4**.frame))
    {
        if (condition) {
            //do stuff
        }
        else if (condition){
            //do something else
        }
    }   
}

原文

I'm trying to create an if statement with the condition depending on a variable object. How can I go about this?

Here is the gist of what I'm trying to do...

if ([gestureRecognizer state] == UIGestureRecognizerStateEnded)
{       
    if (somecondition)
    {
        //Do stuff
    }
    else if (CGRectIntersectsRect(currentImage.frame, **anyOfTheImagesInMyArray**.frame))
    {
        //Do stuff
    }   
}

How can I get the else if condition to check more than one UIView frame before testing true or false?

Updated Code:

What do I do in this case?

if ([gestureRecognizer state] == UIGestureRecognizerStateEnded)
{       
    if (CGRectIntersectsRect(currentImage.frame, **anyOfTheImagesInMyArray_1**.frame))
    {
        //Do stuff
    }
    else if (CGRectIntersectsRect(currentImage.frame, **anyOfTheImagesInMyArray_2**.frame))
    {
        if (condition) {
            //do stuff
        }
        else if (condition){
            //do something else
        }
    }   
    else if (CGRectIntersectsRect(currentImage.frame, **anyOfTheImagesInMyArray_3**.frame))
    {
        if (condition) {
            //do stuff
        }
        else if (condition){
            //do something else
        }
    }   
    else if (CGRectIntersectsRect(currentImage.frame, **anyOfTheImagesInMyArray_4**.frame))
    {
        if (condition) {
            //do stuff
        }
        else if (condition){
            //do something else
        }
    }   
}

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原谅我要高飞 2024-12-17 04:53:08

不确定我的问题是否正确，但如果您想对数组中的每个图像执行一些任务，它应该如下所示：

if ([gestureRecognizer state] == UIGestureRecognizerStateEnded)
{
    // imagesArray is an NSArray holding UIImages
    for (UIImage *image in imagesArray) {
        if (CGRectIntersectsRect(currentImage.frame, image.frame)) {
            if (someCondition) {
                // do stuff
            } else {
                // do something else
            }
        }
    }
}

Not sure if I got the question right, but if you want to perform some tasks on every image in the array it should look e.g. like this:

if ([gestureRecognizer state] == UIGestureRecognizerStateEnded)
{
    // imagesArray is an NSArray holding UIImages
    for (UIImage *image in imagesArray) {
        if (CGRectIntersectsRect(currentImage.frame, image.frame)) {
            if (someCondition) {
                // do stuff
            } else {
                // do something else
            }
        }
    }
}

回复收藏 0 原文

命硬 2024-12-17 04:53:08

据我所知，没有办法简洁地使用现有语法来完成您想要做的事情。相反，请考虑对 NSArray 进行分类，添加一个方法，例如 -containsIntersectingRect:(CGRect)rect，该方法循环遍历 NSValue 对象数组 - 数组只能包含对象，因此您必须将 CGRect 插入到包装为 NSValue 对象的数组中，并查找至少一种肯定的情况CGRectIntersectsRect。

这至少会使语法更加集中并抽象为用于一系列条件的单个方法。