Question

我确实是新的SOS发展,我是试图形成简单表格观点的Im,因此,我增加了一个表象主计长,把我的习惯类别加到这里,现在我正试图增加项目。

So I created a new array:

@property (nonatomic, strong) NSMutableArray *activity;

And I the viewDidLoad, I tried adding some items to the array:

for(int i = 0; i < 20; i++) 
{
    NSLog(@"Current item: %u", i);
    Item *item = [[Item alloc] init];
    item.time = @"14:30";
    item.text = @"A simple test";
    item.startedAgo = @"yesterday";
    item.project = @"testProject";
    [self.activity addObject:item];
}

NSLog(@"Activity count: %u", [self.activity count]);

当我试图生产阵列的透镜时,该标志似乎被罚款,其停留时间为0。

2012-05-02 14:12:50.772 coop_dev[15352:f803] Current item: 0

......

2012-05-02 14:12:50.783 coop_dev[15352:f803] 经常项目:19

2012-05-02 14:12:50.784 coop_dev[15352:f803] 活动:0

我在这里找不到什么东西?

Answer 1

Have you initialize your activity array before adding object to it??
In viewDidLoad initialize your activity array as follows :-

self.activity = [[[NSMutableArray alloc]init]autorelease];

Answer 2

确保在使用之前先开始使用你的阵列

self.activity = [[NSMutableArray alloc] init];

如果你使用ARC,就不需要自动释放。

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