摘要：
//1 数组的创建 NSArray *array=[[NSArray alloc] initWithObjects:@"1",@"2",@"3", nil]; NSArray *array1=[[NSArray alloc] initWithArray:array]; NSArray *array2... 阅读全文
摘要：
//字符串的创建 NSString *str1=@"hello world , are you ok"; NSString *string1=[NSString stringWithFormat:@"%@",@"hello"]; NSLog(@"%@",string1); //1 length 侧... 阅读全文