iOS复习笔记10:使用Block

标签：ios   objective-c   block   

// main.m
#import <Foundation/Foundation.h>


typedef int (^MulBlock)(int, int));


int main()
{
	// 定义一段block,并赋值给block变量block1
	void (^block1)() = ^{//如果没有形参，可以省略参数列表
		NSLog(@"this is a block");
	};
	// 执行block
	block1();


	int (^addBlock)(int, int));
	


	addBlock = ^(int a, int b){
		return a + b;
	};


	int (^subBlock)(int, int)) = ^(int a, int b){
		return a - b;
	};


	NSLog(@"%d + %d ", addBlock(2, 1), subBlock(2 - 1));


	MulBlock add = ^(int a, in b){
		return a + b;
	};


	MulBlock mul = ^(int a, in b){
		return a * b;
	};


	return 0;
}

iOS复习笔记10:使用Block

标签：ios   objective-c   block   

原文地址：http://blog.csdn.net/xufeng0991/article/details/43319269