oc 数组

#import <UIKit/UIKit.h>
#import "AppDelegate.h"

int main(int argc, char * argv[]) {
    //固定数组
    NSArray *arr=@[@"Hello",@"Netcorner"];
    for(int i=0;i<[arr count];i++){
        NSLog(@"%@",[arr objectAtIndex:i]);
    }
    
    //工厂方法创建
    //固定数组
    NSArray *arr1=[NSArray arrayWithObjects:@"HELLO",@"NETCORNER", nil];//nil一定得存在，否则执行就得错误，oc里面是通过nil结尾判断是否结束
    for(int i=0;i<[arr1 count];i++){
        NSLog(@"%@",[arr1 objectAtIndex:i]);
    }
    
    //读取plist文件写入到数组，plist其实就是一个xml文件
    NSArray *arr2=[NSArray arrayWithContentsOfFile:[[NSBundle mainBundle] pathForResource:@"data" ofType:@"plist"]];
    
    //NSLog(@"%d",[arr2  count]);
    
    for(int i=0;i<[arr2 count];i++){
        NSLog(@"%@",[arr2 objectAtIndex:i]);
    }
    
    //可变数组
    NSMutableArray *marr=[[NSMutableArray alloc] init];
    for(int i=0;i<100;i++){
        [marr addObject:[NSString stringWithFormat:@"Item %d",i]];
    }
    NSLog(@"%@",marr);
}