Objective--C的Foundation frame之NSMutableArray代码

#import <Foundation/Foundation.h>

@interface Person : NSObject

@property (nonatomic, strong)NSString *personName;
- (id)initWithName:(NSString *)name;

@end

#import "Person.h"

@implementation Person

- (id)initWithName:(NSString *)name
{
    if (self = [super init])
    {
        _personName = name;
    }
    return self;
}

@end

#import <Foundation/Foundation.h>
#import "Person.h"
int main(int argc, const char * argv[])
{
    @autoreleasepool
    {
        Person *p1 = [[Person alloc] initWithName:@"张三"];
        Person *p2 = [[Person alloc] initWithName:@"李四"];
        Person *p3 = [[Person alloc] initWithName:@"王五"];
        NSArray *personArray = [[NSArray alloc] initWithObjects:p2, p3, nil];
        
        NSMutableArray *array = [[NSMutableArray alloc] init];
        //添加元素
        [array addObject:p1];
        [array addObjectsFromArray:personArray];
        NSLog(@"%@", array);
        //删除元素
        //删除数组内所有的元素
//        [array removeAllObjects];
        //删除数组最后一个元素
//        [array removeLastObject];
        //删除指定元素
        [array removeObject:p2];
        //删除指定下标的元素（注意数组内元素的个数下标问题会导致崩溃）
//        [array removeObjectAtIndex:2];
        NSLog(@"2.%@", array);
        
        //交换元素的位置
        [array exchangeObjectAtIndex:0 withObjectAtIndex:1];
        NSLog(@"%@", array);
    }
    return 0;
}

 *************补充NSArray***********

#import <Foundation/Foundation.h>

int main(int argc, const char * argv[])
{
    @autoreleasepool
    {
        //  OC的数组可以存储不同类型的对象，OC的数组只能存储对象
        NSArray *array1 = [[NSArray alloc] initWithObjects:@"a", @"b", @"c", @"d", @"e", nil];
        //  数组的长度
        int count = (int)array1.count;
        NSLog(@"count = %d", count);
        //判断数组中是否包含对应的对象
        BOOL isHave = [array1 containsObject:@"c"];
        if (isHave)
        {
            NSLog(@"存在");
        }
        else
        {
            NSLog(@"不存在");
        }
        //取得数组中的最后一个元素
        NSString *str = [array1 lastObject];
        NSLog(@"str = %@", str);
        //取首元素
        str = [array1 firstObject];
        NSLog(@"str = %@", str);
        //取出下标为2的元素****
        str = [array1 objectAtIndex:2];
        NSLog(@"str = %@", str);
        //打印元素所对应的下标(如果元素不存在则打印-1的值)
        int index = (int)[array1 indexOfObject:@"d"];
        NSLog(@"index = %d", index);
        
        //数组的遍历（1.基本的for循环通过下标逐一取出查看。2.for in 快速枚举。3.枚举器(迭代器)）
        for(int i = 0; i < count; ++i)//int count = (int)array1.count;
        {
            NSLog(@"%@", array1[i]);
        }
        //或者
        for(int i = 0; i <count; ++i)
        {
            NSString *str1 = [array1 objectAtIndex:i];
            NSLog(@"str1 = %@", str1);
        }
        //2.(如果使用快速枚举，我们需要让数组中元素的类型保持一致)
        for(NSString *str2 in array1)
        {
            NSLog(@"str2 = %@", str2);
        }
        //3.枚举器
        for(id object in array1)
        {
            NSLog(@"object = %@", object);
        }
        
        return 0;
    }
}

2016-08-10 15:32:58.788 NSArray[1308:191388] count = 5
2016-08-10 15:32:58.789 NSArray[1308:191388] 存在
2016-08-10 15:32:58.789 NSArray[1308:191388] str = e
2016-08-10 15:32:58.789 NSArray[1308:191388] str = a
2016-08-10 15:32:58.789 NSArray[1308:191388] str = c
2016-08-10 15:32:58.789 NSArray[1308:191388] index = 3
2016-08-10 15:32:58.789 NSArray[1308:191388] a
2016-08-10 15:32:58.789 NSArray[1308:191388] b
2016-08-10 15:32:58.789 NSArray[1308:191388] c
2016-08-10 15:32:58.790 NSArray[1308:191388] d
2016-08-10 15:32:58.790 NSArray[1308:191388] e
2016-08-10 15:32:58.790 NSArray[1308:191388] str1 = a
2016-08-10 15:32:58.790 NSArray[1308:191388] str1 = b
2016-08-10 15:32:58.790 NSArray[1308:191388] str1 = c
2016-08-10 15:32:58.790 NSArray[1308:191388] str1 = d
2016-08-10 15:32:58.790 NSArray[1308:191388] str1 = e
2016-08-10 15:32:58.790 NSArray[1308:191388] str2 = a
2016-08-10 15:32:58.790 NSArray[1308:191388] str2 = b
2016-08-10 15:32:58.790 NSArray[1308:191388] str2 = c
2016-08-10 15:32:58.790 NSArray[1308:191388] str2 = d
2016-08-10 15:32:58.790 NSArray[1308:191388] str2 = e
2016-08-10 15:32:58.790 NSArray[1308:191388] object = a
2016-08-10 15:32:58.791 NSArray[1308:191388] object = b
2016-08-10 15:32:58.791 NSArray[1308:191388] object = c
2016-08-10 15:32:58.791 NSArray[1308:191388] object = d
2016-08-10 15:32:58.791 NSArray[1308:191388] object = e
Program ended with exit code: 0