OC得Block语法使用

//
//  main.m
//  Block
//
//  Created by Rayln Guan on 8/29/13.
//  Copyright (c) 2013 Rayln Guan. All rights reserved.
//

#import <Foundation/Foundation.h>
typedef int (^MySum) (int, int);

void test1(){
    int (^Sum) (int, int) = ^(int a, int b){
        return a + b;
    };
    NSLog(@"%i", Sum(2, 3));
}

void test2(){
    MySum sum = ^(int a, int b){
        return a + b;
    };
    NSLog(@"%i", sum(10, 2));
}

int main(int argc, const char * argv[])
{

    @autoreleasepool {
        test1();
        test2();
        
    }
    return 0;
}