数组的使用方式

下面是数组：类型NSArray

1 #import 
     
       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     }