Objective-C 数组、可变数组

数组的使用方式

下面是数组：类型NSArray

 1 #import <UIKit/UIKit.h>
 2 #import "AppDelegate.h"
 3 
 4 int main(int argc, char * argv[]) {
 5     
 6     // 通过@符号创建数组
 7     NSArray *arr = @[@"Hello",@"jinpangpang"];
 8     
 9     // 通过工厂方法创建数组
10     NSArray *arr2 = [NSArray arrayWithObjects:@"Hello",@"jinpangpang", nil];
11     
12     // 通过配置文件读取数组
13     NSArray *arr3 = [NSArray arrayWithContentsOfFile:[[NSBundle mainBundle]
14                 pathForResource:@"data" ofType:@"plist"]];
15     
16     for (int i = 0; i<[arr count]; i++) {
17         NSLog(@"%@",[arr objectAtIndex:i]);
18     }
19     
20     @autoreleasepool {
21         return UIApplicationMain(argc, argv, nil, NSStringFromClass([AppDelegate class]));
22     }
23 }

可变数组 NSMutableArray

1     NSMutableArray *arr = [[NSMutableArray alloc] init]; // 开辟一个可变数组对象
2     for (int i=0;i<100; i++) {
3         [arr addObject:[NSString stringWithFormat:@"值：%d",i]]; // 添加值
4     }
5     
6     for (int i = 0 ; i<[arr count]; i++) {    // 遍历输出
7         NSLog(@"%@",[arr objectAtIndex:i]);
8     }