我的应用基于UISplitViewController
,它是一款通用应用
我在我的应用程序中有这个代码,它可以查找来自webserver的数据。
结果显示计数为100,但NSMutableArray
在nil
之后为[myTable reloadData]
。
我该如何解决?
方案
第1页:搜索引擎,将值传递给另一个视图
第2页:从[Page1]接收值,然后传递给实例sendData
。获得JSON的结果,然后在NSMutableArray', using this
to populate
NSMutableArray viewdidload
UITableView'
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
答案 0 :(得分:1)
你需要强制分配你的数组,虽然它是类级别的对象。在viewdidload&中Alloc allFilteredItemsArray将其写为self.allFilteredItemsArray。请检查以下代码:
- (无效)viewDidLoad中 {
[super viewDidLoad];
NSMutableArray * tempArray = [[NSMutableArray alloc] init];
self.allFilteredItemsArray = tempArray;
[tempArray release];
的NSLog(@ “viewDidLoad中”);
[self configureView];
}
此外,您可以将%d用于数组计数,如下所示:
- (NSInteger)tableView:(UITableView *)tableView numberOfRowsInSection:(NSInteger)section {
NSLog(@“numberOfRowsInSection:%d”,[allFilteredItemsArray count]);
return [allFilteredItemsArray count];
}
答案 1 :(得分:0)
如果allFilteredItemsArray
是您的子类的属性,则应将其称为[self allFilteredItemsArray]
。
答案 2 :(得分:0)
您应该将allFilteredItemsArray作为self.allFilteredItemsArray访问,以解决问题; - )