Hey guys i have 2 views the first has a UITableView. The Second Has a textField and when the user presses a "Save" button on the second page, i want the textFields text to be added to the tableView. Here is the code i'm using
- (IBAction)saveButton:(id)sender {
CheckListPracticeViewController * obj = [[CheckListPracticeViewController alloc]init];
[obj.cells insertObject:textField.text atIndex:0];
[self dismissModalViewControllerAnimated:YES];
NSLog(#"%# "[cells objectAtIndex:0]);
[obj.myTableView reloadData];}
For some reason the data isnt being added to the table View does anybody know whats wrong?? Also the NSLog doesnt Work in this method. Thanks a lot Guys :D
That is because you are creating a new instance of CheckListPracticeViewController and updating it rather than the current one which has presented this view controller modally.
Change the first line to,
CheckListPracticeViewController * obj = (CheckListPracticeViewController *)self.parentViewController;
EDIT
First of all be consistent with your data model. If you are loading an array of dictionaries from the plist and later adding strings into that array then you have a serious problem. I will suggest that you create a dictionary object with name and other stuff and add that to the array. I would say doing [obj.cells insertObject:[NSDictionary dictionaryWithObject:textField.text forKey:#"name"] atIndex:0]; instead of [obj.cells insertObject:textField.text atIndex:0]; will fix this current error but I doubt that will fix your problem.
You are each time the button is pressed you alloc/init a new obj, try adding the new data into your actual container.
It's definitely one of these.
Check if array cells is allocated. Most likely it is not. That is why it is not being added to the tableView. You can add it to the init method so that you initialize the array before adding to the array.
Try NSlogging the contents of the array at various points. This will let you know if its exactly what's going on. NSLog the array in IBAction of Add-method, viewWillAppear
You need to make sure that your array is allocated before adding data to it.
NSLog the content of textField.text before adding it to the array. I am guessing that it is not a property, and it is simply null.
Make sure you had assigned self.myTableView = tableView at the end of your cellForRowAtIndexPath
You are creating another instance of CheckListPracticeViewController. I assume thats where your table is. If you are going back to CheckListPracticeViewController (I assume you do since you use [self dismissModalViewControllerAnimated:YES]) you will have to pass your view controller as a week reference or use NSNotification or use NSUserDefaults to store and retrieve this object in the CheckListPracticeViewController.
EDIT
Pass the CheckListPracticeViewController by weak reference to the view that has UITextField.
example:
in the .h of your UITextField class create a controller reference.
#property(nonatomi,assign)CheckListPracticeViewController *controller;
then when you create your new UITextField controller class pass the reference to its creator throught controller instance.
//in CheckListPracticeViewController.m file
myEdiotr.controller = self;
Later use controller instance to save the text from the UITextField.
- (IBAction)saveButton:(id)sender {
[controller.cells insertObject:textField.text atIndex:0];
[controller.myTableView reloadData];
[self dismissModalViewControllerAnimated:YES];
}
Related
I have subclassed a UIView class and I create multiple instances of this class in a loop (incrementing each time), however when I try to set the tag of the view, and log it to the console after they are all created, they all have a tag of 1, regardless of what I set the tag as.
Any help would be appreciated, Thanks!
My Code for creating the subview is here:
//for() loop above with i as counter
FlashCardView *subview = [[FlashCardView alloc] initWithFrame:frame];
subview.delegate = self;
subview.viewNum=i+10; //My attempt at a workaround but I cannot get the view with this later so it is not very helpful
[subview setTag:i+10]; //Tried this and subview.tag=i+10;
NSLog(#"%d", subview.tag); //Prints correctly
//Gets added to parent later
This NSLog logs the correct tag, however when I log the tag in the UIView subclass, it always returns its tag as 1. Also, if I print all the subviews of the parent in a later called method (In the viewcontroller), all of them have the tag 1.
I cannot tell you why, but I can tell you how to find the problem. In your FlashCardView subclass, add this method:
- (void)setTag:(NSInteger)theTag
{
assert(theTag != 1);
[super setTag:theTag];
}
Then, when whatever is setting the tag to 1 does it, the assert will fire and you can look at the stack trace and see where its coming from.
Alternately, remove the assert, and put a breakpoint on the super message.
PS: make sure you enable exceptions!
Hi thanks for all your help, I found that I had accidentally typed in the subclass's variable when I meant to put in something else, setting the tag to 1. #Sunny, thanks for telling me to double-check.
I have UITableView and there is a picker view inside every cell. User can change value of every picker separately.
I need to know that which cell's pickerView is changed. For example, when user move a picker I will know that, this is cell 3.
Is there any way to do that? It's not necessary to get instant changed values. We can store it on array than send when Go button clicked that is not related with tableview.
I would suggest to store an array of pointers to your picker views. So index 0 of your array would point to the picker view of table row 0, etcetera. Then, make sure your view controller is the delegate of all picker views. Implement the pickerView:didSelectRow:inComponent: method declared by the UIPickerViewDelegate protocol. That method has an instance of UIPickerView as parameter: that's the one which value was changed. To obtain the row of that picker view, you can send your array the indexOfObject: method.
Create a subclass of a UITableViewCell. That subclass should get a reference to whatever you want to update, and then it can simply create (or IBOutlet link) to the picker and be a delegate of the picker.
So Cell should have:
- (void) passStuff:(NSMutableDictionary *)datamodel key:(NSString *)key values:(NSArray *)values {
_privateWeakRefDataModel = datamodel;
_privateCopyKey = key;
_privateValues = values;
[picker reloadData];
}
#pragma mark - Picker Delegate Code here
This way the cells will handle updating your data model directly. Keeps your code much cleaner.
i am new to IPhone Development. can some one tell me how to update the content of UIScrollview. i have an NSMutable Array that contains different quotes so if i delete one of the quotes from the scrollview how it can be remove from view and page should move to the next page if the middle one is deleted and should go to the previous one if the last index of an array is deleted. Please Help!
Thanks in Advance
The simplest approach is to create two methods - for adding and removing objects from the NSMutableArray and inside them change the contents of the UIScrollView. For example:
-(void)addObjectToArray:(id)obj
{
[self.myArray addObject:obj];
//Create and initialize a view with a quote for example and add it in the UIScrollView
[self.scrollView addSubView:someView];
}
-(void)removeObjectFromArray:(id)obj
{
[self.myArray removeObject:obj];
//Find the view you need to remove, either by tag or your array is actually from views,
//and remove it from the UIScrollView
[someView removeFromSuperview];
}
Then when inserting or deleting objects from the array use those methods
[self addObjectToArray:someObject];
[self removeObjectFromArray:someObject];
There are some other more elegant approaches using KVO, but need to read some info about that..
after deleting image remove that data from array
[dataarray removeObjectAtIndex:selectedindex];
now again call the scrollview method
I am using storyboards for the 1st time, and I cant figure out what I am doing wrong here ... I have a button that transitions from one view controller to another using StoryBoards (the 2nd view is presented modally).
I am trying to use the "prepare for segue" in order to pass the value of a text field from view 1 to view 2, but it is not working. Can somebody tell me what I have wrong here ... ?
View 1:
-(void)prepareForSegue:(UIStoryboardSegue *)segue sender:(id)sender{
if ([[segue identifier] isEqualToString:#"saveGame"]) {
statsViewController *svc = (statsViewController *)[segue destinationViewController];
[svc setStatsTextField:gameTextField];
}
}
If there is other code I can post to clarify please let me know.
(for the record there are no errors, the text field on view 2 just doesn't update.)
You cannot just assign a text field in one view controller to a property in another one. This achieves nothing for the text field that is actually in the second view controller's view. Instead, you have to assign a value to the text field's text property. (And ideally, this value should not come directly from another text field because you shouldn't use views to store your app's data. Whenever a text field updates, you should store the updated value in a variable in your view controller or model.)
Also, the statsTextField does not yet exist at the time this code is executed because the destination view controller's view is not yet loaded. You should declare a separate string property in statsViewController (class names should begin with a capital letter btw) and then assign the text field's value in viewDidLoad.
The text field is probably nil at that point since the view hasn't been loaded. You can force this (no problem doing so since its about to happen anyway!) by wrapping your code in an if statement:
if (svc.view)
svc.textfield.text = #"Hello";
Accessing the view property forces the view controller to load the view, if it is not already present.
I notice you seem to be passing a whole textfield object instead of a string to the text property - that doesn't seem like a good idea. It should be more like my example above.
Hey guys i have 2 views the first has a UITableView. The Second Has a textField and when the user presses a "Save" button on the second page, i want the textFields text to be added to the tableView. Here is the code i'm using
- (IBAction)saveButton:(id)sender {
CheckListPracticeViewController * obj = [[CheckListPracticeViewController alloc]init];
[obj.cells insertObject:textField.text atIndex:0];
[self dismissModalViewControllerAnimated:YES];
NSLog(#"%# "[cells objectAtIndex:0]);
[obj.myTableView reloadData];}
For some reason the data isnt being added to the table View does anybody know whats wrong?? Also the NSLog doesnt Work in this method. Thanks a lot Guys :D
That is because you are creating a new instance of CheckListPracticeViewController and updating it rather than the current one which has presented this view controller modally.
Change the first line to,
CheckListPracticeViewController * obj = (CheckListPracticeViewController *)self.parentViewController;
EDIT
First of all be consistent with your data model. If you are loading an array of dictionaries from the plist and later adding strings into that array then you have a serious problem. I will suggest that you create a dictionary object with name and other stuff and add that to the array. I would say doing [obj.cells insertObject:[NSDictionary dictionaryWithObject:textField.text forKey:#"name"] atIndex:0]; instead of [obj.cells insertObject:textField.text atIndex:0]; will fix this current error but I doubt that will fix your problem.
You are each time the button is pressed you alloc/init a new obj, try adding the new data into your actual container.
It's definitely one of these.
Check if array cells is allocated. Most likely it is not. That is why it is not being added to the tableView. You can add it to the init method so that you initialize the array before adding to the array.
Try NSlogging the contents of the array at various points. This will let you know if its exactly what's going on. NSLog the array in IBAction of Add-method, viewWillAppear
You need to make sure that your array is allocated before adding data to it.
NSLog the content of textField.text before adding it to the array. I am guessing that it is not a property, and it is simply null.
Make sure you had assigned self.myTableView = tableView at the end of your cellForRowAtIndexPath
You are creating another instance of CheckListPracticeViewController. I assume thats where your table is. If you are going back to CheckListPracticeViewController (I assume you do since you use [self dismissModalViewControllerAnimated:YES]) you will have to pass your view controller as a week reference or use NSNotification or use NSUserDefaults to store and retrieve this object in the CheckListPracticeViewController.
EDIT
Pass the CheckListPracticeViewController by weak reference to the view that has UITextField.
example:
in the .h of your UITextField class create a controller reference.
#property(nonatomi,assign)CheckListPracticeViewController *controller;
then when you create your new UITextField controller class pass the reference to its creator throught controller instance.
//in CheckListPracticeViewController.m file
myEdiotr.controller = self;
Later use controller instance to save the text from the UITextField.
- (IBAction)saveButton:(id)sender {
[controller.cells insertObject:textField.text atIndex:0];
[controller.myTableView reloadData];
[self dismissModalViewControllerAnimated:YES];
}