reloaddata

问题 I have seen this question asked many times but astoundingly, I have not seen a consistent answer, so I will give it a try myself: If you have a tableview containing your own custom UITableViewCells that contain UITextViews and UILabels whose height must be determined at runtime, how are you supposed to determine the height for each row in heightForRowAtIndexPath? The most obvious first idea is to calculate the height for each cell by calculating and then summing the heights of each view

问题 I have seen this question asked many times but astoundingly, I have not seen a consistent answer, so I will give it a try myself: If you have a tableview containing your own custom UITableViewCells that contain UITextViews and UILabels whose height must be determined at runtime, how are you supposed to determine the height for each row in heightForRowAtIndexPath? The most obvious first idea is to calculate the height for each cell by calculating and then summing the heights of each view

问题 My app is a tabBar app. In the first tab there is a tableview with some data; if the user touch a row, he sees some information and he can save that informations ad "favourite". in the second tab there is another tableview with the data saved as "favourite" by the users in the first tab. So... when the user save save as favourite some data, this is my code: -(IBAction)save{ NSString *saved = [NSString stringWithFormat:@"hello %@", my_variable]; //this is just an example :D [my_array addObject

问题 I have a UITableView in one of my view. Lets say the tableView has 100 index. If I scroll down and select 50th index, its pushing to another view. So what I want is, if I pop back to tableView view from second view, the tableView should show from the first index.But currently its was in the index where I selected previously.Please refer the below image for better understanding. Here "smart" is the 25th index.If I select smart, it pushes to another view(Detailed view).So if I again come back

问题 I have a UITableView with a custom header that maintains some state. When I call reloadData to change/update the data in the UITableView, the header gets reloaded too. Is there any way to prevent this behavior in order to maintain state in the table's header? 回答1: Don't put those states in the header. You've mixing the "view" with "model" in the MVC design. Anyway, you could reload specific rows with -reloadRowsAtIndexPaths:withRowAnimation: . 来源： https://stackoverflow.com/questions/2805326

问题 I am doing a Parse query from an external class. This query give me back the array for populate the tableview, so in the viewDidLoad method I call MyClass.load(array) and the async parse method findObjectInBackground return me the array filled but in the time that the findObject retrive me the objects the tableView is already created and I see an empty tableView, I did a fast google search for the problem and I found that I have to use the self.tableView.reloadData() method, I tried it but I

问题 I have a small issue in that after selecting an image from UIImagePickerController (and saving to Parse because my UICollectionView populates from my images on Parse), my UICollectionView will not load the newly saved image until I leave that viewController and go back to it. I've tried just about every work around that I can think of. Where should I be putting my code to save and dismiss controller? func imagePickerController(picker: UIImagePickerController, didFinishPickingImage image:

问题 OK，First this program can load plist from URL by this code，and I put this in - (void)viewdidLoad{ NSURLRequest *theRequest=[NSURLRequest requestWithURL:[NSURL URLWithString:@"http://someurl.php"] cachePolicy:NSURLRequestUseProtocolCachePolicy timeoutInterval:60.0]; NSURLConnection *theConnection=[[NSURLConnection alloc] initWithRequest:theRequest delegate:self]; NSLog(@"\n\nCONNECTION: %@", theConnection); NSData *returnData = [NSURLConnection sendSynchronousRequest:theRequest

问题 Does anyone have idea how to reload TableView that's inside of CollectionViewCustomCell? I have an IBOutlet of that Table and the only way to access that Table is inside cellForItemAtIndexPath method where I can access my CollectionViewCustomCell and through that access the Table . cell.tableViewInsideOfCollectionViewCell.reloadData() But this only works on the first load, when I change CollectionView source it will not reload TableView . If you need anymore info, please ask! Thanks in

问题 I have an iOS app that utilizes RestKit 0.20.1 to retrieve data from a Restful web service. I should also add the app uses CoreData. When the app is started the main screen is a collection view that is populated by a default search term. There is also a textfield in the header that is used as a search bar. I am having trouble clearing out the previously loaded cells when the user uses the search bar. It just loads the new cells and pushes the previous ones down. Here is the applicable code. -