OC中API庫(kù)常見函數(shù)有哪些

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NSMutableArray   可變數(shù)組

 //initWithCapacity: 創(chuàng)建一個(gè)數(shù)組

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

   NSMutableArray * array  = [[NSMutableArray alloc]initWithCapacity:1];//1表示剛開始給數(shù)組分配一個(gè)對(duì)象大小的內(nèi)存,當(dāng)數(shù)組已經(jīng)有一個(gè)對(duì)象時(shí),再放一個(gè)對(duì)象時(shí),數(shù)組會(huì)自動(dòng)添加1個(gè)對(duì)象大小的內(nèi)存,(n代表追加的內(nèi)存?zhèn)€數(shù)).  相同的對(duì)象可以被多次存入數(shù)組中

    NSLog(@"%@", array);

addObject:     給數(shù)組中添加元素(對(duì)象)

- (void)addObject:(id)anObject

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

    //1表示剛開始給數(shù)組分配一個(gè)對(duì)象大小的內(nèi)存,當(dāng)數(shù)組已經(jīng)有一個(gè)對(duì)象時(shí),再放一個(gè)對(duì)象時(shí),數(shù)組會(huì)自動(dòng)添加1個(gè)對(duì)象大小的內(nèi)存,(n代表追加的內(nèi)存?zhèn)€數(shù)).  相同的對(duì)象可以被多次存入數(shù)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(biāo)2插入p2%@", array);

    //removeLastObject

    [array removeLastObject];

    NSLog(@"將最后元素刪除%@", 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(@"添加后%@", array);

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

    NSLog(@"刪除給定個(gè)范圍內(nèi)出現(xiàn)的對(duì)象%@", array);

    //removeObjectAtIndex:

    [array removeObjectAtIndex:1];

    NSLog(@"刪除給定下標(biāo)元素%@", array);

    //replaceObjectAtIndex:withObject:

    [array replaceObjectAtIndex:0 withObject:p3];

    NSLog(@"替換后%@", array);

    //exchangeObjectAtIndex:withObjectAtIndex:

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

    [array exchangeObjectAtIndex:1 withObjectAtIndex:2];

    NSLog(@"交換下標(biāo)1和下標(biāo)2元素%@", array);

打印結(jié)果:

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

    "\U5f201 \U7537 71",

    "\U674e2 \U7537 22",

    "\U5f201 \U7537 71"

)

2015-01-15 22:53:04.516 OC 1月15號(hào)[3452:303] 在下標(biāo)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(hào)[3452:303] 將最后元素刪除(

    "\U5f201 \U7537 71",

    "\U674e2 \U7537 22",

    "\U674e2 \U7537 22"

)

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

    "\U5f201 \U7537 71"

)

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

    "\U5f201 \U7537 71",

    "\U674e2 \U7537 22",

    "\U738b3 \U5973 63",

    "\U5f201 \U7537 71"

)

2015-01-15 22:53:04.556 OC 1月15號(hào)[3452:303] 刪除給定個(gè)范圍內(nèi)出現(xiàn)的對(duì)象(

    "\U674e2 \U7537 22",

    "\U738b3 \U5973 63"

)

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

    "\U674e2 \U7537 22"

)

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

    "\U738b3 \U5973 63"

)

2015-01-15 22:53:04.557 OC 1月15號(hào)[3452:303] 交換下標(biāo)1和下標(biāo)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(duì)象是否是某個(gè)類的對(duì)象

        // isKindOfClass

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

            NSString * newstr = [obj stringByAppendingString:@"藍(lán)鷗"];

            NSLog(@"%@", newstr);

        }

    }

2015-01-15 22:57:53.527 OC 1月15號(hào)[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(hào)[3466:303] 1111藍(lán)鷗

2015-01-15 22:57:53.530 OC 1月15號(hào)[3466:303] 222藍(lán)鷗

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

    //NSNumber  數(shù)值類    把基本數(shù)值型轉(zhuǎn)換成對(duì)象性,或者是數(shù)值對(duì)象轉(zhuǎn)成基本型

    //intValue 把對(duì)象轉(zhuǎn)化為數(shù)值.

    // intValue 和 NSNumber numberWithInt:  是一對(duì)

    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(jié)果:

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

    5,

    10

)

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

 //NSDictionary   不可修改的字典

    //1. 鍵值對(duì)  2. 字典無(wú)序  3. 存對(duì)象  4. 通過(guò)key索引對(duì)應(yīng)的值  5. key唯一

    //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(hào)[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(duì)應(yīng),返回一個(gè)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   //得到鍵值對(duì)的個(gè)數(shù)

    NSLog(@"%ld",[dic1 count]);

    //allKeys  得到所有的鍵

    NSLog(@"%@",[dic1 allKeys]);

    //allValues  得到所有的值

    NSLog(@"%@", [dic1 allValues]);

打印結(jié)果:

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

    age = 30;

    name = zhangsan;

    sex = M;

}

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

    age = 30;

    name = zhangsan;

    sex = W;

}

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

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

    name,

    age,

    sex

)

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

    zhangsan,

    30,

    W

)

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

    //objectForKey:   根據(jù)Key來(lái)索引數(shù)據(jù)

    //- (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,取出字典所有的值

    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(hào)[3524:303] zhangsan

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

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

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

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

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

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

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

//    NSMutableDictionary

//    dictionaryWithCapacity:    創(chuàng)建一個(gè)可以修改內(nèi)容的字典

//     一個(gè)Key對(duì)應(yīng)一個(gè)value

//    一個(gè)value可以對(duì)應(yīng)多個(gè)key

    NSMutableDictionary * dic = [NSMutableDictionary dictionaryWithCapacity:1];

    NSLog(@"dic = %@", dic);

    //setObject:forKey:  往字典里添加鍵值對(duì)

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

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

    [dic setObject:@"zhangsi" forKey:@"name"];//鍵一樣時(shí) ,  會(huì)將鍵指的內(nèi)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(gè)鍵對(duì)應(yīng)的值

    NSLog(@"%@", dic);

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

}

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

    name = zhangsi;

    value1 = 20;

    value2 = 20;

}

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

    name = zhangsi;

    value1 = 20;

}

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

}

 //*************************OC之二維數(shù)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(shù)組(兩層循環(huán),  數(shù)組里面套數(shù)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(shù)組之結(jié)果:%@", a);

        }

    }

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

        (

        111,

        222,

        333,

        444

    ),

        (

        AAA,

        BBB,

        CCC

    ),

        (

        name,

        sex,

        age

    )

)

2015-01-15 23:09:37.713 OC 1月15號(hào)[3546:303] 遍歷數(shù)組之結(jié)果:111

2015-01-15 23:09:37.713 OC 1月15號(hào)[3546:303] 遍歷數(shù)組之結(jié)果:222

2015-01-15 23:09:37.713 OC 1月15號(hào)[3546:303] 遍歷數(shù)組之結(jié)果:333

2015-01-15 23:09:37.714 OC 1月15號(hào)[3546:303] 遍歷數(shù)組之結(jié)果:444

2015-01-15 23:09:37.714 OC 1月15號(hào)[3546:303] 遍歷數(shù)組之結(jié)果:AAA

2015-01-15 23:09:37.715 OC 1月15號(hào)[3546:303] 遍歷數(shù)組之結(jié)果:BBB

2015-01-15 23:09:37.715 OC 1月15號(hào)[3546:303] 遍歷數(shù)組之結(jié)果:CCC

2015-01-15 23:09:37.715 OC 1月15號(hào)[3546:303] 遍歷數(shù)組之結(jié)果:name

2015-01-15 23:09:37.716 OC 1月15號(hào)[3546:303] 遍歷數(shù)組之結(jié)果:sex

2015-01-15 23:09:37.716 OC 1月15號(hào)[3546:303] 遍歷數(shù)組之結(jié)果:age

 // 2  數(shù)組里面套字典

    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(@"遍歷后:%@", result);

        }

    }

2015-01-15 23:10:27.425 OC 1月15號(hào)[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(hào)[3557:303] 遍歷后:zhangsan

2015-01-15 23:10:27.427 OC 1月15號(hào)[3557:303] 遍歷后:M

2015-01-15 23:10:27.428 OC 1月15號(hào)[3557:303] 遍歷后:30

2015-01-15 23:10:27.428 OC 1月15號(hào)[3557:303] 遍歷后:lisi

2015-01-15 23:10:27.429 OC 1月15號(hào)[3557:303] 遍歷后:M

2015-01-15 23:10:27.429 OC 1月15號(hào)[3557:303] 遍歷后:25

<<3>>字典里放數(shù)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(huán)遍歷字典,

        for (int j = 0; j < [[[dic allValues]objectAtIndex:i] count]; j++) {//內(nèi)層循環(huán)遍歷小數(shù)組

            id a = [[[dic allValues] objectAtIndex:i] objectAtIndex:j];//取出數(shù)組里的內(nèi)容

            NSLog(@"遍歷后%@", a);

        }

    }

2015-01-15 23:11:20.271 OC 1月15號(hào)[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(hào)[3565:303] 遍歷后111

2015-01-15 23:11:20.274 OC 1月15號(hào)[3565:303] 遍歷后222

2015-01-15 23:11:20.275 OC 1月15號(hào)[3565:303] 遍歷后333

2015-01-15 23:11:20.275 OC 1月15號(hào)[3565:303] 遍歷后444

2015-01-15 23:11:20.275 OC 1月15號(hào)[3565:303] 遍歷后AAA

2015-01-15 23:11:20.276 OC 1月15號(hào)[3565:303] 遍歷后BBB

2015-01-15 23:11:20.276 OC 1月15號(hào)[3565:303] 遍歷后CCC

2015-01-15 23:11:20.277 OC 1月15號(hào)[3565:303] 遍歷后name

2015-01-15 23:11:20.277 OC 1月15號(hào)[3565:303] 遍歷后sex

2015-01-15 23:11:20.277 OC 1月15號(hào)[3565:303] 遍歷后age

 // 4  字典里套子典

    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(huán)控制大字典鍵值對(duì)數(shù)

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

            //內(nèi)層循環(huán)控制小字典鍵值對(duì)數(shù)!!!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(nèi)容

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

            NSLog(@"遍歷字典(里套小字典)后%@", a);

        }

    }

2015-01-15 23:12:36.630 OC 1月15號(hào)[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(hào)[3573:303] 遍歷字典(里套小字典)后zhangsan

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

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

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

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

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

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