iphone - 添加 NSInteger 对象到 NSMutableArray

Question

我有一个 NSMutableArray

@interface DetailViewController : UIViewController <UITableViewDelegate, UITableViewDataSource> {

NSMutableArray *reponses;
}
@property (nonatomic, retain) NSMutableArray *reponses;

@end

我正在尝试在我的数组 NSInteger 对象中添加:

@synthesize reponses;



NSInteger val2 = [indexPath row];
[reponses addObject:[NSNumber numberWithInteger:val2]];
NSLog(@"the array is %@ and the value is %i",reponses, val2);

对象没有添加到数组中是行不通的，这是控制台显示的内容:

the array is (null) and the value is 2

Answer 1

@Omz:是的。确保已分配并初始化数组。请检查以下代码

NSMutableArray *array = [[NSMutableArray alloc] init];
NSInteger num = 7;
NSNumber *number = [NSNumber numberWithInt:num];
[ar addObject:number];
NSLog(@"Array %@",array);

我已经检查过了，它有效。如果不再需要数组，请确保释放它。