如何在 Objective-C 中跳出两个嵌套的 for 循环? [英] How can I break out of two nested for loops in Objective-C?

问题描述

我有两个这样嵌套的 for 循环:

I have two for loops nested like this:

for(...) {
    for(...) {

    }
}

我知道有一个 break 语句.但是我很困惑它是中断了两个循环还是只中断了它被调用的那个?一旦我发现迭代更多次没有意义，我就需要打破这两个.

I know that there is a break statement. But I am confused about if it breaks both loops or just the one in which it was called? I need to break both ones as soon as I see that it doesn't make sense to iterate more times over.

推荐答案

break 跳出一个循环，但您可以在外循环中添加一个检查，当内循环中断时会中断.

break breaks out of one loop, but you can add a check to the outer loop which breaks when the inner breaks.

bool dobreak = false;
for ( ..; !dobreak && ..; .. ) {
   for ( ... ) {
      if (...) {
         dobreak = true;
         break;
      }
   }
}

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