【非凡程序员】 　ＯＣ第十节课　（代码块）

代码块就相当于C语言中一个函数一样

//
//  main.m
//  DaiMaKuai
//
//  Created by 非凡程序员 on 15/5/28.
//  Copyright (c) 2015年 非凡程序员. All rights reserved.
//

#import <Foundation/Foundation.h>

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

int i=7;

//代码块格式如下：
        int (^chengFa)(int,int) = ^(int num1,int num2) {return num1*num2;};
        int aa=chengFa(4,5);
        NSLog(@"%i",aa);

//        NSArray * test = @[@"1",@"2",@"3",@"4",@"5",@"6",@"7",@"8",@"9",@"10"];
//       
//        NSArray * (^zhuanHua)(void) = ^(void)
//        {
//           
//            NSMutableArray * zhuan = [NSMutableArray arrayWithCapacity:10];
//           
//            for( int i = 9 ; i >= 0 ; i-- )
//            {
//                [zhuan addObject: test[i]];
//            }
//            return zhuan;
//        };
//       
//        NSLog(@"%@，zhuanHua());
//

};

//首字母排序（数字优先）
       
        NSArray *test2=[NSArray arrayWithObjects:@"asdsf",@"bfgdg",@"dadgre",@"33",@"2",@"230", nil];
       
        NSArray *paiXu=[test2 sortedArrayUsingComparator:^(NSString *aa1,NSString *aa2)
        {
            return [aa1 compare:aa2];
        }];
        NSLog(@"%@,paiXu）；
        
        
        
        
        //haha相当于一个类的名字，dd和cc相当于一个可调用到方法
        typedef double (^haha)(double c,double f);
        haha dd= ^(double c,double f)
        {
            return c * f;
        };
        NSLog(@"%.2f", dd(1.2,2.2));

haha cc= ^(double c,double f)
        {
            return c +f;
        };
        NSLog(@"%.2f", cc(1.2,2.2));
        }
   
   
    return 0;
}

/*--------------------字符串----------------------------*/
        NSMutableString *pp2=[NSMutableString stringWithCapacity:1]; //可变字符串
        [pp2 appendString:@"dsfsdfsg"];
        [pp2 appendString:@"1111"];//增加字符内容  
        NSLog(@%@,pp2);
        
        NSRange a = NSMakeRange(2, 3);
        NSRange strRange = [pp2 rangeOfString:@"1111"];//查找内容
        [pp2 replaceCharactersInRange:strRange  withString:@"ds"];   // 替换
       // [pp2 deleteCharactersInRange:strRange];//删除内容
       NSLog(@%@,pp2);