block作为属性,作为参数,作为返回值各种情况演示

//
//  ViewController.m
//  block作为属性,作为参数各种情况演示
//
//  Created by xiaobing on 15/9/12.
//  Copyright (c) 2015年 xiaobing. All rights reserved.
//

#import "ViewController.h"
#pragma mark - blcok作为属性
@interface ViewController ()
/**<没有返回值,没有参数的block*/
@property (nonatomic, copy) void(^myBlock1)();

/**<有返回值,没有参数的block*/
@property (nonatomic, copy) int(^myBlock2)();

/**<没有返回值,有参数的block*/
@property (nonatomic, copy) void(^myBlock3)(int, int);

/**<有返回值,有参数的block*/
@property (nonatomic, copy) int (^myBlock4)(int, int);

/** "" @end= "" @implementation viewcontroller= "" - (void)viewdidload {= ""      [ super  viewdidload];= "" #pragma mark - 作为参数=""     [self setupnav1:^{=""         nslog(@"%s", __func__);=""     }];=""     [self setupnav2:^int{=""         return 3;=""     [self setupnav3:^(int a, int b) {=""         nslog(@"%d", a + b);=""     [self setupnav4:^int(int a, int b) {=""         return a + b;="" #pragma mark - 作为返回值调用=""     [self setuptab1]();=""     [self setuptab2]();=""     [self setuptab3](1, 3);=""     [self setuptab4](1, 3);="" }="" #pragma mark - blcok作为参数="" **=""  * 没有返回值,没有参数的block作为参数=""  *="" - (void)setupnav1:(void(^)())myblock1="" {=""     myblock1();="" - (void)setupnav2:(int(^)())myblock2=""     myblock2();=""  * 没有返回值,有参数的block作为参数="" - (void)setupnav3:(void(^)(int, int))myblock3=""     myblock3(3, 5);="" - (void)setupnav4:(int(^)(int, int))myblock4=""     myblock4(3, 5);="" #pragma mark - blcok作为返回值=""  * 没有返回值,没有参数的block作为返回值="" - (void(^)())setuptab1=""     void(^block)() =" ^{"         nslog(@"setupnav1");=""     };=""     return block;=""  * 有返回值,没有参数的block作为返回值="" - (int(^)())setuptab2=""     int(^block)() =" ^{"  * 没有返回值,有参数的block作为返回值="" - (void(^)(int, int))setuptab3=""     void(^block)(int, int) =" ^(int a, int b){"         int c =" a + b;"         nslog(@"%d", c);=""  * 有返回值,有参数的block作为返回值="" - (int(^)(int, int))setuptab4=""     int(^block)(int, int) =" ^(int a, int b){"         return c;="" @end<="" pre="">