版本

一、不可變數(shù)組NSArray

老規(guī)矩，先貼上知識(shí)點(diǎn)，再打個(gè)例子和舉個(gè)比方。    

//使用arrayWithObjects創(chuàng)建NSArray

    NSArray *arr = [NSArray arrayWithObjects:@"abc",@"def",@"123",nil];

//    NSArray *arr = [[NSArray alloc] initWithObjects:@"111",@"ddd",@"234",nil];

    //使用arrayWithArray創(chuàng)建NSArray

    NSArray *arr1 = [NSArray arrayWithArray:arr];

//    NSArray *arr1 = [[NSArray alloc]initWithArray:arr];

    //使用@創(chuàng)建NSArray,只能創(chuàng)建不可變數(shù)組

    NSArray *arr2 = @[@"aaaa",@"bbb",@"ddddd"];

    NSLog(@"arr2 = %@",arr2);

    //返回元素個(gè)數(shù)

    NSLog(@"arr2 count = %ld",[arr2 count]);

    //返回指定位置id

    NSString *str0 = [arr2 objectAtIndex:2];

    NSLog(@"str0 = %@",str0);

    //訪問(wèn)數(shù)組的最后一個(gè)元素

    NSString *str = [arr2 lastObject];

    NSLog(@"str = %@",str);

    //訪問(wèn)數(shù)組的第一個(gè)元素

    NSString *str1 = [arr firstObject];

    NSLog(@"str1 = %@",str1);

    //判斷數(shù)組內(nèi)是否含有某一個(gè)對(duì)象

    if([arr containsObject:@"123"]) {

        NSLog(@"含有此對(duì)象");

    }

    //獲取某個(gè)對(duì)象在數(shù)組中的下標(biāo)值

    NSUInteger index = [arr indexOfObject:@"123"];

    //數(shù)組的遍歷

    for(NSInteger i =0;i < [arr count]; i++) {

        NSLog(@"arr[%ld] = %@",i,arr[i]);

    }

    //快速枚舉法(快速遍歷)

    for(id objin  arr) {

        NSLog(@"obj = %@",obj);

    }

int main(int argc, char * argv[]) {        //使用arrayWithObjects創(chuàng)建NSArray    NSArray *arr = [NSArray arrayWithObjects:@"ABC",@"DEF",@"GHI",nil];        //NSArray *arr = [[NSArray alloc] initWithObjects:@"ABC",@"DEF",@"GHI",nil];    NSLog(@"arr = %@",arr);        //使用arrayWithArray創(chuàng)建NSArray    NSArray *arr1 = [NSArray arrayWithArray:arr];        //NSArray *arr1 = [[NSArray alloc]initWithArray:arr];    NSLog(@"arr1 = %@",arr1);        //使用@創(chuàng)建NSArray,只能創(chuàng)建不可變數(shù)組    NSArray *arr2 = @[@"123",@"456",@"789"];    NSLog(@"arr2 = %@",arr2);        //返回元素個(gè)數(shù)    NSLog(@"arr count = %ld",[arr count]);        //返回指定位置id    NSString *str = [arr objectAtIndex:1];    NSLog(@"str = %@",str);        //訪問(wèn)數(shù)組的第一個(gè)元素    NSString *strF = [arr firstObject];    NSLog(@"strF = %@",strF);        //訪問(wèn)數(shù)組的最后一個(gè)元素    NSString *strL = [arr lastObject];    NSLog(@"strL = %@",strL);        //判斷數(shù)組內(nèi)是否含有某一個(gè)對(duì)象    if ([arr2 containsObject:@"456"]) {        NSLog(@"數(shù)組arr2內(nèi)含有對(duì)象456");    }        //獲取某個(gè)對(duì)象在數(shù)組中的下標(biāo)值    NSUInteger index = [arr indexOfObject:@"ABC"];    NSLog(@"ABC下標(biāo)值為%ld",index);        //數(shù)組的遍歷    for (NSInteger i = 0; i < [arr count]; i++) {        NSLog(@"arr[%ld] = %@",i,arr[i]);    }        //快速枚舉法(快速遍歷)    for (id arr2Q in arr2) {        NSLog(@"arr2Q = %@",arr2Q);    }}輸出結(jié)果：
二、可變數(shù)組NSMutableArray
    //實(shí)例化一個(gè)空的可變數(shù)組
    NSMutableArray *nsarr = [[NSMutableArray alloc]init];
    
    //添加一個(gè)元素
    [nsarr addObject:@"ONE"];
    NSLog(@"nsarr = %@",nsarr);
    
    //添加多個(gè)元素
    [nsarr addObjectsFromArray:@[@"ONE",@"TWO",@"THREE"]];
    NSLog(@"nsarr = %@",nsarr);
    
    //插入元素
    [nsarr insertObject:@"Two" atIndex:1];
    NSLog(@"nsarr = %@",nsarr);
    
    //替換元素
    [nsarr replaceObjectAtIndex:0 withObject:@"1"];
    NSLog(@"nsarr = %@",nsarr);
    
    //查詢?cè)?/p>
    NSString *result = [nsarr objectAtIndex:1];//arr[1]
    NSLog(@"result = %@",result);
    
    //刪除指定元素
    [nsarr removeObject:@"ONE"];
    NSLog(@"nsarr = %@",nsarr);
    
    //刪除指定下標(biāo)的元素
    [nsarr removeObjectAtIndex:2];
    NSLog(@"nsarr = %@",nsarr);
    
    //刪除最后一個(gè)元素
    [nsarr removeLastObject];
    NSLog(@"nsarr = %@",nsarr);
    
    //刪除所有元素
    [nsarr removeAllObjects];
    NSLog(@"nsarr = %@",nsarr);
    
    //刪除數(shù)組中含有的所有元素
    [nsarr removeObjectsInArray:@[@"1",@"THREE"]];
    
    //交換元素
    NSMutableArray *nsarr1 = [NSMutableArray arrayWithObjects:@"1",@"2",@"3",nil];
    [nsarr1 exchangeObjectAtIndex:1 withObjectAtIndex:2];
    NSLog(@"nsarr1 = %@",nsarr1);
    
    //切割字符串
    NSString *str3 = @"I am a super man + beautiful, yeah!";
    //用指定的字符串進(jìn)行切割
    NSArray *rArr = [str3 componentsSeparatedByString:@" "];
    NSLog(@"rArr = %@",rArr);
    
    //實(shí)例化一個(gè)字符集合
    NSCharacterSet *set = [NSCharacterSet  characterSetWithCharactersInString:@" ,+"];
    //按照字符集合所提供的字符進(jìn)行切割
    NSArray *rArr2 = [str3 componentsSeparatedByCharactersInSet:set];
    NSLog(@"rArr2 = %@",rArr2);
    
    //拼接數(shù)組內(nèi)的字符串
    NSString *str2 = [rArr2 componentsJoinedByString:@"-"];
    NSLog(@"str2 = %@",str2);
    
    //按照ASCII碼大小進(jìn)行排序,SEL:方法選擇器(儲(chǔ)存一個(gè)方法名)
    NSMutableArray *arr3 = [NSMutableArray arrayWithObjects:@"B",@"A",@"C",@"Z",nil];
    [arr3 sortedArrayUsingSelector:@selector(compare:)];//方法選擇器
    
    //按三個(gè)人年齡大小排序
    Person *per0 = [[Person alloc]initWith:18];
    Person *per1 = [[Person alloc]initWith:6];
    Person *per2 = [[Person alloc]initWith:60];
    NSMutableArray *perArr = [[NSMutableArray alloc]initWithObjects:per0,per1,per2,nil];
    //compareAge提供一個(gè)排序方法，看按什么方式排序
    NSArray *resultPerArr = [perArr sortedArrayUsingSelector:@selector(compareAge:)];
int main(int argc, char * argv[]) {        //實(shí)例化一個(gè)空的可變數(shù)組    NSMutableArray *arr = [[NSMutableArray alloc]init];        //添加一個(gè)元素    [arr addObject:@"he"];    NSLog(@"arr = %@",arr);        //添加多個(gè)元素    [arr addObjectsFromArray:@[@"is",@"Chinese"]];    NSLog(@"arr = %@",arr);    //插入元素    [arr insertObject:@"not" atIndex:2];    NSLog(@"arr = %@",arr);        //以arrayWithArray創(chuàng)建arr1    NSMutableArray  *arr1 = [NSMutableArray arrayWithArray:arr];    //替換元素    [arr replaceObjectAtIndex:3 withObject:@"Japanese"];    NSLog(@"arr = %@",arr);    //查詢?cè)?   NSString *result = [arr objectAtIndex:0];    NSLog(@"arr[0] = %@",result);    //刪除指定元素    [arr removeObject:@"not"];    NSLog(@"arr = %@",arr);    //刪除指定下標(biāo)的元素    [arr removeObjectAtIndex:1];    NSLog(@"arr = %@",arr);    //刪除最后一個(gè)元素    [arr removeLastObject];    NSLog(@"arr = %@",arr);    //刪除所有元素    [arr removeAllObjects];    NSLog(@"arr = %@",arr);    //刪除數(shù)組中含有的所有元素    [arr1 removeObjectsInArray:@[@"not",@"is"]];    NSLog(@"arr1 = %@",arr1);    //交換元素    [arr1 exchangeObjectAtIndex:0 withObjectAtIndex:1];    NSLog(@"arr1 = %@",arr1);    //切割字符串    NSString *str1 = @"I am,a super man!";    //用指定的字符串進(jìn)行切割    NSArray *cutArr = [str1 componentsSeparatedByString:@","];    NSLog(@"cutArr = %@",cutArr);    //實(shí)例化一個(gè)字符集合    NSCharacterSet *set = [NSCharacterSet  characterSetWithCharactersInString:@"super "];    //按照字符集合所提供的字符進(jìn)行切割    NSArray *cutArr2 = [str1 componentsSeparatedByCharactersInSet:set];    NSLog(@"cutArr2 = %@",cutArr2);    //拼接數(shù)組內(nèi)的字符串    NSString *str2 = [cutArr2 componentsJoinedByString:@"-"];    NSLog(@"str2 = %@",str2); /*    //按照ASCII碼大小進(jìn)行排序,SEL:方法選擇器(儲(chǔ)存一個(gè)方法名)    NSMutableArray *arr3 = [NSMutableArray arrayWithObjects:@"B",@"A",@"C",@"Z",nil];    [arr3 sortedArrayUsingSelector:@selector(compare:)]; //方法選擇器        //按三個(gè)人年齡大小排序    Person *per0 = [[Person alloc]initWith:18];    Person *per1 = [[Person alloc]initWith:6];    Person *per2 = [[Person alloc]initWith:60];    NSMutableArray *perArr = [[NSMutableArray alloc]initWithObjects:per0,per1,per2,nil];    //compareAge提供一個(gè)排序方法，看按什么方式排序    NSArray *resultPerArr = [perArr sortedArrayUsingSelector:@selector(compareAge:)]; */}輸出結(jié)果：