2

我的应用程序基于 aUISplitViewController并且它是通用应用程序。
我的应用程序中有这段代码，它可以从网络服务器查找数据。

结果显示计数为 100，但NSMutableArray在nil之后[myTable reloadData]。

我该如何解决？

场景 Page1：一个搜索引擎，将值传递给另一个视图 Page2：从 [Page1] 接收值然后传递给实例sendData。通过 JSON 获取结果，然后将它们转换为NSMutableArray', using thisNSMutableArray to populateUITableView'viewdidload

代码：

- (void)configureView
{
    if (self.detailItem) {
        NSLog(@"ConfigureView");
        [self sendData];
        [self refreshTable];
    }
}

- (void)viewDidLoad
{
    [super viewDidLoad];
    NSLog(@"viewdidload");
    [self configureView];
}

- (void)didReceiveMemoryWarning
{
    [super didReceiveMemoryWarning];
    // Dispose of any resources that can be recreated.
}

-(void) refreshTable 
{
    NSLog(@"Refresh Table");
    [myTable reloadData];
    NSLog(@"Counter:%i",allFilteredItemsArray.count);
}

#pragma mark - Table

-(NSInteger)tableView:(UITableView *)tableView numberOfRowsInSection:(NSInteger)section
{
    NSLog(@"numberOfRowsInSection: %i", allFilteredItemsArray.count);
    return [allFilteredItemsArray count];
}

-(NSInteger)numberOfSectionsInTableView:(UITableView *)tableView
{
    return 1;
}

-(UITableViewCell *)tableView:(UITableView *)tableView cellForRowAtIndexPath:(NSIndexPath *)indexPath
{

    static NSString *CellIdentifier = @"fileredCell";
    UITableViewCell *cell = [myTable dequeueReusableCellWithIdentifier:CellIdentifier];
    HardwareCell *hardwareCell = [[HardwareCell alloc] init];

    // Configure the cell...
    NSDictionary *item = [allFilteredItemsArray objectAtIndex:[indexPath row]];
    hardwareCell.lbl_model = [item objectForKey:@"name"];

    return cell;

}

#pragma mark - Searching Asset

-(void)sendData
{    
    NSString *searchString = [self.detailItem description];

    .........ignored some of the code............

    allFilteredItemsArray = [NSJSONSerialization JSONObjectWithData:responseData options:kNilOptions error:&error];

    NSLog(@"Search Count: %i", allFilteredItemsArray.count);
    NSLog(@"End Searching Data.");

}

结果：

2012-10-17 10:45:54.535 Portal[10753:c07] viewdidload
2012-10-17 10:45:54.536 Portal[10753:c07] Value to be sent: %/%/%/%/%/1
2012-10-17 10:45:54.537 Portal[10753:c07] ConfigureView
2012-10-17 10:45:54.537 Portal[10753:c07] Start Seraching Data...
2012-10-17 10:45:54.923 Portal[10753:c07] Search Count: 100
2012-10-17 10:45:54.923 Portal[10753:c07] End Searching Data.
2012-10-17 10:45:54.923 Portal[10753:c07] Refresh Table
2012-10-17 10:45:54.924 Portal[10753:c07] Counter:100
2012-10-17 10:45:54.924 Portal[10753:c07] numberOfRowsInSection: 0
4

3 回答 3

1

You need to alloc your array compulsorily though it's class-level object. Alloc allFilteredItemsArray in viewdidload & write it as self.allFilteredItemsArray. Check the following code:

-(void)viewDidLoad {

[super viewDidLoad];

NSMutableArray *tempArray=[[NSMutableArray alloc] init];

self.allFilteredItemsArray=tempArray;

[tempArray release];

NSLog(@"viewdidload");

[self configureView];

}

Also You can use %d for array count as follow:

-(NSInteger)tableView:(UITableView *)tableView numberOfRowsInSection:(NSInteger)section {

NSLog(@"numberOfRowsInSection: %d",[allFilteredItemsArray count]);

return [allFilteredItemsArray count];

}

于 2012-10-17T07:33:00.427 回答
0

如果allFilteredItemsArray是您的子类的属性，您应该将其称为[self allFilteredItemsArray].

于 2012-10-17T04:12:40.537 回答
0

您应该将 allFilteredItemsArray 作为 self.allFilteredItemsArray 访问，这可能会解决问题；-)

于 2012-10-17T04:21:36.387 回答