问题是,当用户从表格视图中选择单元格时,我无法让 UI 活动指示器激活动画或显示。
执行周期如下所示:
- 使用表格视图查看负载
- 用户单击单元格 - (UIActivityIndicator 在此步骤无法显示或动画)
- 收集数据时出现活动指示器
- 使用加载的数据调用新视图
- 用户从导航栏中单击返回按钮
- 重复循环
加载对象是情节提要中的活动指示器链接。
@synthesize jsonConnection, bakeryProductArray, bakeryTableView, loading;
- (void)viewDidLoad
{
[super viewDidLoad];
// Do any additional setup after loading the view, typically from a nib.
[self retrieveData];
}
- (void)didReceiveMemoryWarning
{
[super didReceiveMemoryWarning];
// Dispose of any resources that can be recreated.
}
- (void)viewWillAppear:(BOOL)animated
{
[self.navigationController setNavigationBarHidden:YES animated:animated];
[super viewWillAppear:animated];
}
- (void)viewWillDisappear:(BOOL)animated
{
loading.hidden = YES;
[self.navigationController setNavigationBarHidden:NO animated:animated];
[super viewWillDisappear:animated];
}
#pragma mark - UITableView DataSource
-(NSInteger)numberOfSectionsInTableView:(UITableView *)tableView
{
return 1;
}
-(NSInteger)tableView:(UITableView *)tableView numberOfRowsInSection:(NSInteger)section
{
if (tableView == self.searchDisplayController.searchResultsTableView) {
return [searchResults count];
}
else {
return [bakeryProductArray count];
}
}
-(UITableViewCell *)tableView:(UITableView *)tableView cellForRowAtIndexPath:(NSIndexPath *)indexPath
{
static NSString *cellIdentifier = @"Cell";
UITableViewCell *cell = [tableView dequeueReusableCellWithIdentifier:cellIdentifier];
if (cell == nil) {
cell = [[UITableViewCell alloc] initWithStyle:UITableViewCellStyleSubtitle reuseIdentifier:cellIdentifier];
}
if (tableView == self.searchDisplayController.searchResultsTableView) {
foodProducts *currentProduct = [searchResults objectAtIndex:indexPath.row];
cell.textLabel.text = currentProduct.productName;
}
else {
foodProducts *currentProduct = [bakeryProductArray objectAtIndex:indexPath.row];
cell.textLabel.text = currentProduct.productName;
cell.detailTextLabel.text = currentProduct.productquantity;
cell.accessoryType = UITableViewCellAccessoryDisclosureIndicator;
}
return cell;
}
#pragma mark - UITableView Delegate methods
-(void)tableView:(UITableView *)tableView didSelectRowAtIndexPath:(NSIndexPath *)indexPath
{
if (bakeryTableView == self.searchDisplayController.searchResultsTableView) {
[self performSegueWithIdentifier: @"bakeryDetails" sender: self];
}
detailedViewController *productinfo = [self.storyboard instantiateViewControllerWithIdentifier:@"bakeryDetails"];
//Retrieve current user array
foodProducts *currentProduct2 = [bakeryProductArray objectAtIndex:indexPath.row];
productinfo.productName = currentProduct2.productName;
productinfo.productImage = currentProduct2.productImgUrl;
productinfo.productDescription = currentProduct2.productDescription;
productinfo.productPrice = currentProduct2.productPrice;
productinfo.productQuantity = currentProduct2.productquantity;
productinfo.productAllergy = currentProduct2.productAllergy;
[loading startAnimating];
[self.navigationController pushViewController:productinfo animated:YES];
[bakeryTableView deselectRowAtIndexPath:indexPath animated:YES];
}
我检查了明显的东西,例如:
如果活动指示器位于对象后面。未激活 IB 的功能
如果您需要更多信息,请直接说。
任何帮助都会很棒
干杯