//創(chuàng)建數(shù)組簡(jiǎn)寫(xiě)方式 一般用這種
        NSArray *array = @[@"xc",@"lxc",@"cc"];
        //創(chuàng)建數(shù)組的非簡(jiǎn)寫(xiě)方式
        NSArray *array1 = [NSArray arrayWithObjects:@"11",@"22",@"33", nil];
        //獲取數(shù)組的對(duì)應(yīng)的元素
        NSLog(@"array = %@",[array objectAtIndex:0]);
        //獲取數(shù)組的第一個(gè)元素
        NSLog(@"array1 = %@",[array1 firstObject]);
        //簡(jiǎn)寫(xiě)獲取數(shù)組的對(duì)應(yīng)的元素
        NSLog(@"array = %@",array1[2]);
        //判斷數(shù)組中包含某個(gè)元素
        if ([array containsObject:@"xc"]) {
            NSLog(@"包含xx");
        }else{
            NSLog(@"不包含xx");
        }
        NSArray *array = @[@"xc",@"lxc",@"cc"];
        //OC遍歷數(shù)組：逐個(gè)取出a中的元素，將取出的元素賦值給arr
        //a 的類(lèi)型可以根據(jù)數(shù)組中元素的類(lèi)型來(lái)寫(xiě)，不一定要寫(xiě)NSObject
        for (NSObject * a in array) {
            NSLog(@"a = %@",a);
        }
//        for (NSString *b  in array) {
//            NSLog(@"b = %@",b);
//        }
        //使用OC數(shù)組的迭代器來(lái)遍歷
        //每取出一個(gè)元素就會(huì)調(diào)用一次block菇绵，每次調(diào)用block都會(huì)將當(dāng)前取出的元素和元素對(duì)應(yīng)的索引傳遞出來(lái)镊叁，obj = 取出的元素，idx = 當(dāng)前元素對(duì)應(yīng)的索引 ， stop 用來(lái)控制什么時(shí)候停止遍歷
        [array enumerateObjectsUsingBlock:^(id  _Nonnull obj, NSUInteger idx, BOOL * _Nonnull stop) {
            if (idx ==2) {
                *stop = YES;
            }
            NSLog(@"obj = %@, idx = %lu",obj,idx);
        }];

        Person *p1 = [Person new];
        Person *p2 = [Person new];
        Person *p3 = [Person new];
        NSArray *arrP = @[p1,p2,p3];
        //如果使用OC數(shù)組儲(chǔ)存對(duì)象，可以調(diào)用OC數(shù)組的方法讓數(shù)組中所有的元素都執(zhí)行指定的方法
        [arrP makeObjectsPerformSelector:@selector(sayWithName:) withObject:@"xc"];

        NSArray *arr = @[@2,@5,@9,@3];
        //如果想使用compare方法對(duì)數(shù)組中的元素進(jìn)行排序，那么數(shù)組中的元素必須是Foundation框架中的對(duì)象瞻润，不能自定義對(duì)象進(jìn)行排序
        NSArray *newArr = [arr sortedArrayUsingSelector:@selector(compare:)];
        NSLog(@"newArr = %@",newArr);
        
        Person *p = [Person new];
        Person *p1 = [Person new];
        Person *p2 = [Person new];
        Person *p3 = [Person new];
        p.age = 10;
        p1.age = 23;
        p2.age = 9;
        p3.age = 3;
        
        //不能使用compare方法自定義對(duì)象進(jìn)行排序
        NSArray *arrP = @[p,p1,p2,p3];
        //該方法默認(rèn)會(huì)按照升序排序
        NSArray *newArrP = [arrP sortedArrayWithOptions:NSSortStable usingComparator:^NSComparisonResult(Person* obj1, Person* obj2) {
            //每次調(diào)用block都會(huì)取出數(shù)組中的兩個(gè)元素
            return obj1.age > obj2.age; //>大于按照升序排列 <小于按照降序排列
        }];
        NSLog(@"%@",newArrP);

   //通過(guò)一個(gè)字符串生成一個(gè)數(shù)組
       NSString * name = @"xc-cyf-xxx";
        NSArray * arr = [name componentsSeparatedByString:@"-"];
        NSLog(@"%@",arr);
 
 //在名字后面加上--最后一個(gè)名字不帶--
        NSArray *nameArr = @[@"xc",@"yf",@"cc"];
        NSMutableString *name = [NSMutableString new];
        for (NSString *append in nameArr) {
            [name appendString:append];
            [name appendString:@"--"];
        }
       
        [name deleteCharactersInRange:NSMakeRange(name.length-2, 2)];
         NSLog(@"%@",name);