在arc下使用objc_getClassList [英] Using objc_getClassList under arc

问题描述

有没有人设法在arc下使用objc_getClassList，而不是为有问题的文件关闭弧？

Has anybody managed to use objc_getClassList under arc, short of turning arc off for the file in question?

基本问题是其中一个参数是C类指针数组。

The fundamental problem is that one of the parameters is a C array of Class pointers.

推荐答案

此代码应在ARC下运行：

This code should work under ARC:

int numClasses;
Class *classes = NULL;

classes = NULL;
numClasses = objc_getClassList(NULL, 0);
NSLog(@"Number of classes: %d", numClasses);

if (numClasses > 0 )
{
    classes = (__unsafe_unretained Class *)malloc(sizeof(Class) * numClasses);
    numClasses = objc_getClassList(classes, numClasses);
    for (int i = 0; i < numClasses; i++) {
        NSLog(@"Class name: %s", class_getName(classes[i]));
    }
    free(classes);
}

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