OC API庫常見之函數(二)

NSMutableArray   可變數組

 //initWithCapacity: 建立一個數組

   // - (instancetype)initWithCapacity:(NSUInteger)numItems

   NSMutableArray * array  = [[NSMutableArray alloc]initWithCapacity:1];//1表示剛開始給數組分配一個對象大小的內存,當數組已經有一個對象時,再放一個對象時,數組會自動添加1個對象大小的內存,(n表明追加的內存個數).  相同的對象能夠被屢次存入數組中

    NSLog(@"%@", array);

addObject:     給數組中添加元素(對象)

- (void)addObject:(id)anObject

  NSMutableArray * array  = [[NSMutableArray alloc]initWithCapacity:1];

    //1表示剛開始給數組分配一個對象大小的內存,當數組已經有一個對象時,再放一個對象時,數組會自動添加1個對象大小的內存,(n表明追加的內存個數).  相同的對象能夠被屢次存入數組中

    Person * p1 = [[Person alloc]initWithName:@"張1" sex:@"男" age:71];

    Person * p2 = [[Person alloc]initWithName:@"李2" sex:@"男" age:22];

    Person * p3 = [[Person alloc]initWithName:@"王3" sex:@"女" age:63];

    [array addObject:p1];[array addObject:p2];[array addObject:p1];

     NSLog(@"%@", array);

    //insertObject:atIndex:

    [array insertObject:p2 atIndex:2];

    NSLog(@"在下標2插入p2%@", array);

    //removeLastObject

    [array removeLastObject];

    NSLog(@"將最後元素刪除%@", array);

    //removeObject:

    [array removeObject:p2];

    NSLog(@"將p2元素刪除%@", array);

    //removeObject:inRange:

    [array addObject:p2];    [array addObject:p3];

    [array addObject:p1];

    NSLog(@"添加後%@", array);

    [array removeObject:p1 inRange:NSMakeRange(0, 4)];

    NSLog(@"刪除給定個範圍內出現的對象%@", array);

    //removeObjectAtIndex:

    [array removeObjectAtIndex:1];

    NSLog(@"刪除給定下標元素%@", array);

    //replaceObjectAtIndex:withObject:

    [array replaceObjectAtIndex:0 withObject:p3];

    NSLog(@"替換後%@", array);

    //exchangeObjectAtIndex:withObjectAtIndex:

    [array addObject:p1];[array addObject:p2];

    [array exchangeObjectAtIndex:1 withObjectAtIndex:2];

    NSLog(@"交換下標1和下標2元素%@", array);

打印結果:

2015-01-15 22:53:04.514 OC 1月15號[3452:303] (

    "\U5f201 \U7537 71",

    "\U674e2 \U7537 22",

    "\U5f201 \U7537 71"

)

2015-01-15 22:53:04.516 OC 1月15號[3452:303] 在下標2插入p2(

    "\U5f201 \U7537 71",

    "\U674e2 \U7537 22",

    "\U674e2 \U7537 22",

    "\U5f201 \U7537 71"

)

2015-01-15 22:53:04.517 OC 1月15號[3452:303] 將最後元素刪除(

    "\U5f201 \U7537 71",

    "\U674e2 \U7537 22",

    "\U674e2 \U7537 22"

)

2015-01-15 22:53:04.517 OC 1月15號[3452:303] 將p2元素刪除(

    "\U5f201 \U7537 71"

)

2015-01-15 22:53:04.518 OC 1月15號[3452:303] 添加後(

    "\U5f201 \U7537 71",

    "\U674e2 \U7537 22",

    "\U738b3 \U5973 63",

    "\U5f201 \U7537 71"

)

2015-01-15 22:53:04.556 OC 1月15號[3452:303] 刪除給定個範圍內出現的對象(

    "\U674e2 \U7537 22",

    "\U738b3 \U5973 63"

)

2015-01-15 22:53:04.556 OC 1月15號[3452:303] 刪除給定下標元素(

    "\U674e2 \U7537 22"

)

2015-01-15 22:53:04.557 OC 1月15號[3452:303] 替換後(

    "\U738b3 \U5973 63"

)

2015-01-15 22:53:04.557 OC 1月15號[3452:303] 交換下標1和下標2元素(

    "\U738b3 \U5973 63",

    "\U674e2 \U7537 22",

    "\U5f201 \U7537 71"

)

   Person * p1 = [[Person alloc]initWithName:@"張1" sex:@"男" age:71];

    Person * p2 = [[Person alloc]initWithName:@"李2" sex:@"男" age:22];

    Person * p3 = [[Person alloc]initWithName:@"王3" sex:@"女" age:63];

    NSArray * array = [NSArray arrayWithObjects:p1,p2,p3,@"1111", @"222", nil];

    NSLog(@"%@",array);

    for (int i = 0; i < [array count]; i++) {

        id obj = [array objectAtIndex:i];

        //檢查對象是不是某個類的對象

        // isKindOfClass

        if ([obj isKindOfClass:[NSString class]]) {

            NSString * newstr = [obj stringByAppendingString:@"藍鷗"];

            NSLog(@"%@", newstr);

        }

    }

2015-01-15 22:57:53.527 OC 1月15號[3466:303] (

    "\U5f201 \U7537 71",

    "\U674e2 \U7537 22",

    "\U738b3 \U5973 63",

    1111,

    222

)

2015-01-15 22:57:53.529 OC 1月15號[3466:303] 1111藍鷗

2015-01-15 22:57:53.530 OC 1月15號[3466:303] 222藍鷗

  

    //*************NSNumber***************

    //NSNumber  數值類    把基本數值型轉換成對象性,或者是數值對象轉成基本型

    //intValue 把對象轉化爲數值.

    // intValue 和 NSNumber numberWithInt:  是一對

    int n = 5;

    NSNumber * n1 = [NSNumber numberWithInt:n];

    NSArray * array = [NSArray arrayWithObjects:n1,[NSNumber numberWithInt:10], nil];

    NSLog(@"%@", array);

    int result = [[array firstObject] intValue] + [[array lastObject] intValue];

    NSLog(@"result = %d", result);

打印結果:

2015-01-15 22:59:36.037 OC 1月15號[3474:303] (

    5,

    10

)

2015-01-15 22:59:36.039 OC 1月15號[3474:303] result = 15

 //NSDictionary   不可修改的字典

    //1. 鍵值對  2. 字典無序  3. 存對象  4. 經過key索引對應的值  5. key惟一

    //initWithObjectsAndKeys:

   NSDictionary * dic = [[NSDictionary alloc]initWithObjectsAndKeys:@"張三",@"name",@"男",@"sex",@"25",@"年齡", nil];

    NSLog(@"%@", dic);

2015-01-15 23:00:33.258 OC 1月15號[3484:303] {

    name = "\U5f20\U4e09";

    sex = "\U7537";

    "\U5e74\U9f84" = 25;

}

  NSDictionary * dic = [NSDictionary dictionaryWithObjectsAndKeys:@"zhangsan",@"name", @"M",@"sex", @"30", @"age", nil];

    NSLog(@"%@", dic);

    //dictionaryWithObjects:forKeys:  類方法,將值和鍵分別對應,返回一個字典

    //+ (instancetype)dictionaryWithObjects:(NSArray *)objectsforKeys:(NSArray *)keys

    NSArray * arrayValue = [NSArray arrayWithObjects:@"zhangsan",@"30",@"W", nil];

    NSArray * keyArray = [NSArray arrayWithObjects:@"name", @"age", @"sex", nil];

    NSDictionary * dic1 = [NSDictionary dictionaryWithObjects:arrayValue forKeys:keyArray];

    NSLog(@"%@", dic1);

    //count   //獲得鍵值對的個數

    NSLog(@"%ld",[dic1 count]);

    //allKeys  獲得全部的鍵

    NSLog(@"%@",[dic1 allKeys]);

    //allValues  獲得全部的值

    NSLog(@"%@", [dic1 allValues]);

打印結果:

2015-01-15 23:01:17.213 OC 1月15號[3492:303] {

    age = 30;

    name = zhangsan;

    sex = M;

}

2015-01-15 23:01:17.216 OC 1月15號[3492:303] {

    age = 30;

    name = zhangsan;

    sex = W;

}

2015-01-15 23:01:17.216 OC 1月15號[3492:303] 3

2015-01-15 23:01:17.217 OC 1月15號[3492:303] (

    name,

    age,

    sex

)

2015-01-15 23:01:17.217 OC 1月15號[3492:303] (

    zhangsan,

    30,

    W

)

//**************************objectForKey: 重要***********************************//

    //objectForKey:   根據Key來索引數據

    //- (id)objectForKey:(id)aKey

    NSArray * arrayValue = [NSArray arrayWithObjects:@"zhangsan",@"30",@"W", nil];

    NSArray * keyArray = [NSArray arrayWithObjects:@"name", @"age", @"sex", nil];

     NSDictionary * dic1 = [NSDictionary dictionaryWithObjects:arrayValue forKeys:keyArray];

    NSString * str = [dic1 objectForKey:@"name"];

    NSLog(@"%@", str);

    //遍歷字典,取出字典全部的值

    for (int i = 0; i < [dic1 count]; i++) {

        NSString * key = [[dic1 allKeys] objectAtIndex:i];

        NSString * value = [dic1 objectForKey:key];

        NSLog(@"遍歷1 %@", value);

    }

    //遍歷2

    NSArray * array = [dic1 allValues];

    for (int i= 0; i < [dic1 count]; i++) {

        NSString * str = array[i];

        NSLog(@"遍歷2 %@", str);

    }

2015-01-15 23:05:29.028 OC 1月15號[3524:303] zhangsan

2015-01-15 23:05:29.030 OC 1月15號[3524:303] 遍歷1 zhangsan

2015-01-15 23:05:29.031 OC 1月15號[3524:303] 遍歷1 30

2015-01-15 23:05:29.031 OC 1月15號[3524:303] 遍歷1 W

2015-01-15 23:05:29.032 OC 1月15號[3524:303] 遍歷2 zhangsan

2015-01-15 23:05:29.032 OC 1月15號[3524:303] 遍歷2 30

2015-01-15 23:05:29.032 OC 1月15號[3524:303] 遍歷2 W

 //**************************    NSMutableDictionary*********************

//    NSMutableDictionary

//    dictionaryWithCapacity:    建立一個能夠修改內容的字典

//     一個Key對應一個value

//    一個value能夠對應多個key

    NSMutableDictionary * dic = [NSMutableDictionary dictionaryWithCapacity:1];

    NSLog(@"dic = %@", dic);

    //setObject:forKey:  往字典裏添加鍵值對

    //- (void)setObject:(id)anObjectforKey:(id<NSCopying>)aKey

    [dic setObject:@"zhangsan" forKey:@"name"];

    [dic setObject:@"zhangsi" forKey:@"name"];//鍵同樣時 ,  會將鍵指的內容替換掉

    [dic setObject:@"20" forKey:@"value1"];

    [dic setObject:@"20" forKey:@"value2"];

    NSLog(@"%@", dic);

    //removeObjectForKey:

    [dic removeObjectForKey:@"value2"];

    NSLog(@"%@", dic);

//    [dic removeAllObjects];

//    NSLog(@"%@", dic);

    NSArray * array = [NSArray arrayWithObjects:@"value1",@"name" , nil];

    [dic removeObjectsForKeys:array];    //移除多個鍵對應的值

    NSLog(@"%@", dic);

2015-01-15 23:08:49.741 OC 1月15號[3538:303] dic = {

}

2015-01-15 23:08:49.743 OC 1月15號[3538:303] {

    name = zhangsi;

    value1 = 20;

    value2 = 20;

}

2015-01-15 23:08:49.744 OC 1月15號[3538:303] {

    name = zhangsi;

    value1 = 20;

}

2015-01-15 23:08:49.744 OC 1月15號[3538:303] {

}

 //*************************OC之二維數組***********************//

    NSArray * firstArray = [NSArray arrayWithObjects:@"111", @"222", @"333", @"444", nil];

    NSArray * secondArray = [NSArray arrayWithObjects:@"AAA", @"BBB", @"CCC", nil];

    NSArray * thirdArray = [NSArray arrayWithObjects:@"name", @"sex", @"age", nil];

    NSArray * bigArray = [NSArray arrayWithObjects:firstArray, secondArray,thirdArray, nil];

    NSLog(@"%@", bigArray);

    //  1  遍歷數組(兩層循環,  數組裏面套數組)

    for (int i = 0; i < [bigArray count]; i++) {

        for (int j = 0; j < [[bigArray objectAtIndex:i] count]; j++) {

            id a = [[bigArray objectAtIndex:i] objectAtIndex:j];

            NSLog(@"遍歷數組之結果:%@", a);

        }

    }

2015-01-15 23:09:37.710 OC 1月15號[3546:303] (

        (

        111,

        222,

        333,

        444

    ),

        (

        AAA,

        BBB,

        CCC

    ),

        (

        name,

        sex,

        age

    )

)

2015-01-15 23:09:37.713 OC 1月15號[3546:303] 遍歷數組之結果:111

2015-01-15 23:09:37.713 OC 1月15號[3546:303] 遍歷數組之結果:222

2015-01-15 23:09:37.713 OC 1月15號[3546:303] 遍歷數組之結果:333

2015-01-15 23:09:37.714 OC 1月15號[3546:303] 遍歷數組之結果:444

2015-01-15 23:09:37.714 OC 1月15號[3546:303] 遍歷數組之結果:AAA

2015-01-15 23:09:37.715 OC 1月15號[3546:303] 遍歷數組之結果:BBB

2015-01-15 23:09:37.715 OC 1月15號[3546:303] 遍歷數組之結果:CCC

2015-01-15 23:09:37.715 OC 1月15號[3546:303] 遍歷數組之結果:name

2015-01-15 23:09:37.716 OC 1月15號[3546:303] 遍歷數組之結果:sex

2015-01-15 23:09:37.716 OC 1月15號[3546:303] 遍歷數組之結果:age

 // 2  數組裏面套字典

    NSDictionary * stuDic1 = [NSDictionary dictionaryWithObjectsAndKeys:@"zhangsan", @"name", @"M", @"sex",@"30", @"age", nil];

    NSDictionary * stuDic2 = [NSDictionary dictionaryWithObjectsAndKeys:@"lisi", @"name", @"M", @"sex", @"25", @"age", nil];

    NSArray * array = [NSArray arrayWithObjects:stuDic1, stuDic2, nil];

    NSLog(@"%@", array);

    for (int i = 0; i < [array count]; i++) {

        for (int j = 0; j < [[array objectAtIndex:i] count]; j++) {

            id result = [[[array objectAtIndex:i]allValues] objectAtIndex:j];

            NSLog(@"遍歷後:%@", result);

        }

    }

2015-01-15 23:10:27.425 OC 1月15號[3557:303] (

        {

        age = 30;

        name = zhangsan;

        sex = M;

    },

        {

        age = 25;

        name = lisi;

        sex = M;

    }

)

2015-01-15 23:10:27.427 OC 1月15號[3557:303] 遍歷後:zhangsan

2015-01-15 23:10:27.427 OC 1月15號[3557:303] 遍歷後:M

2015-01-15 23:10:27.428 OC 1月15號[3557:303] 遍歷後:30

2015-01-15 23:10:27.428 OC 1月15號[3557:303] 遍歷後:lisi

2015-01-15 23:10:27.429 OC 1月15號[3557:303] 遍歷後:M

2015-01-15 23:10:27.429 OC 1月15號[3557:303] 遍歷後:25

<<3>>字典裏放數組

    NSArray * firstArray = [NSArray arrayWithObjects:@"111", @"222", @"333", @"444", nil];

        NSArray * secondArray = [NSArray arrayWithObjects:@"AAA", @"BBB", @"CCC", nil];

        NSArray * thirdArray = [NSArray arrayWithObjects:@"name", @"sex", @"age", nil];

    NSDictionary * dic = [NSDictionary dictionaryWithObjectsAndKeys:firstArray, @"first",secondArray, @"second",thirdArray, @"third", nil];

    NSLog(@"%@", dic);

    for (int i = 0; i < [dic count]; i++) {//外層循環遍歷字典,

        for (int j = 0; j < [[[dic allValues]objectAtIndex:i] count]; j++) {//內層循環遍歷小數組

            id a = [[[dic allValues] objectAtIndex:i] objectAtIndex:j];//取出數組裏的內容

            NSLog(@"遍歷後%@", a);

        }

    }

2015-01-15 23:11:20.271 OC 1月15號[3565:303] {

    first =     (

        111,

        222,

        333,

        444

    );

    second =     (

        AAA,

        BBB,

        CCC

    );

    third =     (

        name,

        sex,

        age

    );

}

2015-01-15 23:11:20.274 OC 1月15號[3565:303] 遍歷後111

2015-01-15 23:11:20.274 OC 1月15號[3565:303] 遍歷後222

2015-01-15 23:11:20.275 OC 1月15號[3565:303] 遍歷後333

2015-01-15 23:11:20.275 OC 1月15號[3565:303] 遍歷後444

2015-01-15 23:11:20.275 OC 1月15號[3565:303] 遍歷後AAA

2015-01-15 23:11:20.276 OC 1月15號[3565:303] 遍歷後BBB

2015-01-15 23:11:20.276 OC 1月15號[3565:303] 遍歷後CCC

2015-01-15 23:11:20.277 OC 1月15號[3565:303] 遍歷後name

2015-01-15 23:11:20.277 OC 1月15號[3565:303] 遍歷後sex

2015-01-15 23:11:20.277 OC 1月15號[3565:303] 遍歷後age

 // 4  字典裏套子典

    NSDictionary * stuDic1 = [NSDictionary dictionaryWithObjectsAndKeys:@"zhangsan", @"name", @"M", @"sex",@"30", @"age", nil];

    NSDictionary * stuDic2 = [NSDictionary dictionaryWithObjectsAndKeys:@"lisi", @"name", @"M", @"sex", @"30", @"age", nil];

    NSDictionary * bigDic = [NSDictionary dictionaryWithObjectsAndKeys:stuDic1,@"first", stuDic2, @"second", nil];

    NSLog(@"%@", bigDic);

    for (int i = 0; i < [bigDic count]; i++) {

        //外層循環控制大字典鍵值對數

        for (int j = 0; j < [[[bigDic allValues]objectAtIndex:i] count]; j++) {

            //內層循環控制小字典鍵值對數!!!注意要先取出大字典的值集( allValue ),用objiectAtIndex:   得出小字典,再求小字典的值集,用objiectAtIndex: 求出具體內容

            id a = [[[[bigDic allValues]objectAtIndex:i] allValues] objectAtIndex:j];

            NSLog(@"遍歷字典(裏套小字典)後%@", a);

        }

    }

2015-01-15 23:12:36.630 OC 1月15號[3573:303] {

    first =     {

        age = 30;

        name = zhangsan;

        sex = M;

    };

    second =     {

        age = 30;

        name = lisi;

        sex = M;

    };

}

2015-01-15 23:12:36.632 OC 1月15號[3573:303] 遍歷字典(裏套小字典)後zhangsan

2015-01-15 23:12:36.633 OC 1月15號[3573:303] 遍歷字典(裏套小字典)後M

2015-01-15 23:12:36.633 OC 1月15號[3573:303] 遍歷字典(裏套小字典)後30

2015-01-15 23:12:36.634 OC 1月15號[3573:303] 遍歷字典(裏套小字典)後lisi

2015-01-15 23:12:36.634 OC 1月15號[3573:303] 遍歷字典(裏套小字典)後M

2015-01-15 23:12:36.634 OC 1月15號[3573:303] 遍歷字典(裏套小字典)後30