[英]adding NSInteger object to NSMutableArray
I have an NSMutableArray 我有一个NSMutableArray
@interface DetailViewController : UIViewController <UITableViewDelegate, UITableViewDataSource> {
NSMutableArray *reponses;
}
@property (nonatomic, retain) NSMutableArray *reponses;
@end
and i'm trying to add in my array NSInteger object: 我正在尝试添加我的数组NSInteger对象:
@synthesize reponses;
NSInteger val2 = [indexPath row];
[reponses addObject:[NSNumber numberWithInteger:val2]];
NSLog(@"the array is %@ and the value is %i",reponses, val2);
it won't work the object was not added to the array, this is what console shows: 如果没有将对象添加到数组中它将无法工作,这是控制台显示的内容:
the array is (null) and the value is 2
@Omz: is right. @Omz:是的。 Make sure you have the array allocated and initialized.
确保已分配和初始化阵列。 Please check the following code
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);
I have checked this and it works. 我已经检查了这个并且它有效。 If
array
is no longer needed make sure you release
it. 如果不再需要
array
确保将其release
。
You're not initializing your array, so it's still nil
when you're trying to add to it. 你没有初始化你的数组,所以当你试图添加它时它仍然是
nil
。
self.responses = [NSMutableArray array];
//now you can add to it.
You have not initialized the responses array. 您尚未初始化响应数组。 In your code, may be viewDidLoad, do:
在您的代码中,可能是viewDidLoad,执行:
reponses = [[NSMutableArray alloc] init];
Then add the object to your array. 然后将对象添加到数组中。
NSInteger val2 = [indexPath row];
[self.reponses addObject:[NSNumber numberWithInteger:val2]];
That should work. 这应该工作。
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