初识RAC:001--Block简单使用

1.新建一个Person类

.h文件中

#import <Foundation/Foundation.h>@interface Person : NSObject//0.block在ARC中试用Strong就行  在非ARC机制中试用Copy,block作为对象的属性@property(nonatomic,strong) void(^CZGBlock)(void);//返回值、方法名、参数//1.block作为方法的参数，()里面为参数的属性，block为参数名- (void)eat:(void(^)(void))block;//无参数- (void)run:(void(^)(int meter))runBlock;//有参数//2.block作为返回值- (void(^)(void))seelp;//无参数- (void(^)(int mintune))seelp1;//有参数@end

.m文件中

#import "Person.h"@implementation Person- (void)eat:(void(^)(void))block{    block();//执行外面传进来的block方法}-(void)run:(void (^)(int))runBlock{    runBlock([@"123" intValue]);//执行外面传进来的block方法,同时将方法的参数传出去外面}- (void (^)(void))seelp{    return ^(){        NSLog(@"睡你麻痹,起来嗨");    };}-(void (^)(int))seelp1{    return ^(int m){        NSLog(@"哥们你睡了%d分钟",m);    };}@end

2.ViewController中

.m中

#import "ViewController.h"#import "Person.h"@interface ViewController ()@property(nonatomic,strong)Person *P;@end@implementation ViewController- (void)viewDidLoad {    [super viewDidLoad];    // Do any additional setup after loading the view, typically from a nib.    Person *p = [[Person alloc]init];    self.P = p;    [self block0];    [self block1];    [self block2];}//0.block作为对象的属性,可将对象外的值赋值给对象- (void)block0{    //block -->inlineBlock    void(^CZGBlock)(void) = ^() {        NSLog(@"block运行");    };    //调用block    self.P.CZGBlock =  CZGBlock;}//1.block作为方法的参数- (void)block1{    [self.P eat:^{        NSLog(@"吃了");    }];        [self.P run:^(int meter) {        NSLog(@"run了%d米",meter);    }];}//2.block作为返回值- (void)block2{    self.P.seelp();    self.P.seelp1(123);}- (void)touchesBegan:(NSSet<UITouch *> *)touches withEvent:(UIEvent *)event{    self.P.CZGBlock();}- (void)didReceiveMemoryWarning {    [super didReceiveMemoryWarning];    // Dispose of any resources that can be recreated.}@end