相关疑难解决方法(0)

我有一个继承自NSObject的类.它使用NSMutableArray来保存子对象,例如使用NSMutableArray*项的People来保存Person对象.如何在项目上实现NSFastEnumerator？

我尝试过以下但是无效:

@interface People : NSObject <NSFastEnumeration>
{
    NSMutableArray *items;
}

@implementation ...

- (NSUInteger)countByEnumeratingWithState:(NSFastEnumerationState *)state objects:(id *)stackbuf count:(NSUInteger)len
{
    if(state->state == 0)
    {
        state->mutationsPtr = (unsigned long *)self;
        state->itemsPtr = items;
        state->state = [items count];
        return count;
    }
    else
        return 0;
}