objective-c - Early Exit from Fast Enumerate Loop?

Question

When using fast enumeration, is there a way to exit early, i.e. before going through every element in the array?

    for (element in myArray)
    {
        //is there a way to exit before running through every element in myArray?
    }

Answer 1

break;将退出任何for, while, 或do循环。

例如：

for (element in myArray)
{
     if (someExitCondition)
     {
         break; /* leave now */
     }
}

读这个：

http://msdn.microsoft.com/en-us/library/wt88dxx6(v=vs.80).aspx

Answer 2

更好的方法是使用块

[dict enumerateKeysAndObjectsUsingBlock:^(id key, id object, BOOL *stop) {
stop = YES // To break the loop }];