返回指向块的指针

Question

我在类中有一个静态块变量。如何声明属性或实例选择器以将该块返回或发送给调用者？

这是我的静态阻止：

static NSResultComparison(^myBlock)(id obj1, id obj2);

Answer 1

最好typedef你的阻止。

//interface.h
typedef NSResultComparison (^ComparisonBlock)(id obj1, id obj2);

@interface ...
...

-(ComparisonBlock) getComparisonBlock;

@end

---

//implementation.m
//Here is your static block implementation
static ComparisonBlock myStaticBlock = ^(id obj1, id obj2)
{
    ...
    return result;
};

@implementation ...

-(ComparisonBlock)getComparisonBlock
{
    return myStaticBlock;
}

@end