type int (^myblock)(int ,int);

myblock b1 =^(int a,int b){

  a+b;
}
调用的时候怎么调？  b1(1,2);?    ?

嗯 ，是这样的，写了一个列子
{
    int base = 100;
    long (^sum)(int, int) = ^ long (int a, int b) {

        return base + a + b;
    };

    base = 0;
    printf("%ld\n",sum(1,2));

typedef int (^MyBlock)(int,int);

int main()
{
    MyBlock b1 =^(int a, int b){return a+b;};
    int sum = b1(1,2)
    NSLog（@“%d",sum)===> 3;

    return 0;

}