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【Foundation Frame】NSMutableArray

NSArray 代表集合元素不可变的集合,一旦NSArray被创建成功,程序不能向集合中添加新元素,删除旧元素,替换旧元素。
NSMultableArray 恰恰相反,为可变元素的集合,可以增加、删除、替换元素。
可进行的操作:
1、创建 arrayWithCapacity
2、增加元素,以add开头
3、删除元素,以remove开头
4、替换元素,以replace开头
5、对集合本身排序,以sort开头(与NSArray不同,NSMutable是对元素集合自身进行排序,NSArray则是返回一个新的排序完成的元素集合。

(注:以下程序仅供参考,还有很多方法没有列出来)
//
//  main.m
//  NSMultableArray
//
//  Created by mac on 14-12-3.
//  Copyright (c) 2014mac. All rights reserved.
//

#import<Foundation/Foundation.h>

voidmultableCreatAray()
{
   
//创建MultableArray
   
NSMutableArray * array1 =[NSMutableArrayarrayWithCapacity:10];
   
NSMutableArray * array2 =[NSMutableArrayarrayWithObjects:@"Hello1",@"Hello2",@"Hello3",@"Hello4",nil];
   
NSMutableArray * array3 =[NSMutableArrayarrayWithObjects:@"Insert1",@"insert2",@"Insert3",nil];
   
//array1中增加元素
    [array1
addObject:@"Hello1"];
    [array1
addObject:@"Hello2"];
    [array2
addObject:@"Hello5"];
   
NSLog(@"%@",array1);
   
NSLog(@"%@",array2);
    [array1
addObjectsFromArray:array2];
   
NSLog(@"%@",array1);
    [array1
insertObject:@"Insert1"atIndex:2];
   
NSLog(@"%@",array1);
   
   
//删除元素
    [array1
removeObject:@"Hello1"];
   
NSLog(@"%@",array1);
   
   
NSMutableArray *array = [NSMutableArrayarrayWithObjects:@"one",@"two",@"three",@"four",nil];
   
NSArray *newAdditions = [NSArrayarrayWithObjects:@"a",@"b",nil];
   
NSMutableIndexSet *indexes = [NSMutableIndexSetindexSetWithIndex:1];
    [indexes
addIndex:3];
    [array
insertObjects:newAdditionsatIndexes:indexes];
   
NSLog(@"array: %@", array);
 
}

intmain(intargc, const char * argv[]) {
   
@autoreleasepool {
       
// insert code here...
       
NSLog(@"Hello, World!");
       
multableCreatAray();
       
    }
   
return 0;
}

====>>>>>

2014-12-03 17:32:27.148 NSMultableArray[2527:303] Hello, World!
2014-12-03 17:32:27.151 NSMultableArray[2527:303] (
    Hello1,
    Hello2
)
2014-12-03 17:32:27.152 NSMultableArray[2527:303] (
    Hello1,
    Hello2,
    Hello3,
    Hello4,
    Hello5
)
2014-12-03 17:32:27.152 NSMultableArray[2527:303] (
    Hello1,
    Hello2,
    Hello1,
    Hello2,
    Hello3,
    Hello4,
    Hello5
)
2014-12-03 17:32:27.153 NSMultableArray[2527:303] (
    Hello1,
    Hello2,
    Insert1,
    Hello1,
    Hello2,
    Hello3,
    Hello4,
    Hello5
)
2014-12-03 17:32:27.153 NSMultableArray[2527:303] (
    Hello2,
    Insert1,
    Hello2,
    Hello3,
    Hello4,
    Hello5
)
2014-12-03 17:32:27.154 NSMultableArray[2527:303] array: (
    one,
    a,
    two,
    b,
    three,
    four
)
Program ended with exit code: 0

【Foundation Frame】NSMutableArray