1 #import <Foundation/Foundation.h>
2
3 int main(int argc, const char * argv[]) {
4 @autoreleasepool {
5 //创建并设定数组元素个数
6 NSMutableArray *arr1=[NSMutableArray arrayWithCapacity:7];
7 //复制数组
8 NSArray *arr2=@[@"mon",@"tue",@"wed",@"thu",@"fri",@"sat",@"sun"];
9 NSMutableArray *arr3=[NSMutableArray arrayWithArray:arr2];
10 //向数组中添加一个元素
11 [arr3 addObject:@"eig"];
12 //根据指定下标插入元素
13 [arr3 insertObject:@"nin" atIndex:8];
14 //删除最后一个元素
15 [arr3 removeLastObject];
16 //根据指定下标删除元素
17 [arr3 removeObjectAtIndex:7];
18 //根据指定对象删除元素（若未找到返回NSNotfind
19 [arr3 removeObject:@"sun"];
20 //替换指定下标的元素
21 [arr3 replaceObjectAtIndex:0 withObject:@"one"];
22 //删除全部元素
23 [arr3 removeAllObjects];
24 }
25 return 0;
26 }
