可变数组 NSMutableArray

最新推荐文章于 2018-05-07 19:27:25 发布

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最新推荐文章于 2018-05-07 19:27:25 发布

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原文链接：http://www.cnblogs.com/WJR12/p/5048612.html

本文探讨了Objective-C与Swift两种编程语言在iOS开发领域的应用与区别，包括其核心特性、优缺点及实际案例分析。

//
//  main.m
//  可变数组
//
//  Created by MAC on 15/12/15.
//  Copyright © 2015年 MAC. All rights reserved.
//

#import <Foundation/Foundation.h>
#import "Person.h"
int main(int argc, const char * argv[]) {
    @autoreleasepool {
        NSMutableArray *mArray = [NSMutableArray arrayWithCapacity:10];
        NSArray *array = @[@"one",@"two",@"three"];
        //写入文件
       // [array writeToFile:@"/Users/mac/desktop/test.txt" atomically:YES];
        //从文件中读取赋值给数组
        NSMutableArray *mArray2 = [NSMutableArray arrayWithContentsOfFile:@"/Users/mac/desktop/test.txt"];
        NSLog(@"%@",mArray2);
        //将实例化的两个对象赋值给数组
        Person *p1 = [[Person alloc]init];
        p1.pid = 1001;
        p1.name = @"tom";
        p1.age = 20;
         //增加到数组
        [mArray addObject:p1];
        
        Person *p2 = [[Person alloc]init];
        p2.pid = 1002;
        p2.name = @"kite";
        p2.age = 22;
        //增加到数组
        [mArray addObject:p2];
        NSLog(@"%@",mArray);
         //删除数组中的对象
        [mArray removeObject:p2];
        NSLog(@"%@",mArray);
        //removeALLObjects 删除所有
        //removeObjects range 删除范围
        
        //在某个位置插入对象
        [mArray insertObject:@"aaa" atIndex:1];
        NSLog(@"%@",mArray);
        //替换索引处的位置
        [mArray replaceObjectAtIndex:1 withObject:@"www"];
        NSLog(@"%@",mArray);
        //替换掉整个数组
        [mArray setArray:array];
        NSLog(@"%@",mArray);
    }
    return 0;
}

转载于:https://www.cnblogs.com/WJR12/p/5048612.html