Goal
I want to have a keyboard (custom) to show when I click on a cell in my tableview and have said keyboard edit a label in the selected cell.
What I have read and tried
Stack overflow and other searched threads/tutorials
A Swift example of Custom Views for Data Input (custom in-app keyboard)
How to make custom keyboard only for my app in Swift?
iOS 8: Creating a Custom Keyboard in Swift
Along with other results and searches (also the recommended readings within these threads), these were great for me getting the keyboard the way I want it (which is app-specific, I don't want to have the user install the keyboard to use the app), however, none explain how I could "activate" the keyboard without a textfield.
My thought process is this: I will have a keyboard with a textfield in place in order to receive the input from the keys pressed. This input would then be sent to the label that is in the selected cell. The problem is in the keyboard showing without anything to call it...
Why I don't want a textfield in the cell: Because I think it is more smart/elegant to have the tableview cell activate the keyboard. I have seen this in other apps and I can't figure out how it is done.
Any help on this matter is much appreciated. I am completely new to programming, am using Swift (so have no clue Obj-C or the like).
Thank you!
Well after a lot of discussions around other websites, it is a shame to say it but what I wanted was actually impossible (like stated by Duncan). For some reason I thought that in programming that word did not exist, but alas it is there. Well, the way that I did work around this limitation was as replied here in the comments as well as from the resource materials I already read:
I have 2 views:
tableView - this will have the list of items that I would like to edit a value. Has multiple labels where one of them would be edited by the user.
keyboardView - custom keyboard that would allow user input.
For the keyboard I used the delegate method as described in "A Swift example of Custom Views for Data Input". This worked perfectly and would send the data over to the tableView under the keyWasTapped function.
Next was the tableView. I had 3 labels in the custom cell, where one was called valueLabel. I had to add a textField to my storyboard hidden behind the tableview with which the user will interact and in the didselectrow I included the command to summon the keyboard:
func tableView(tableView: UITableView, didSelectRowAtIndexPath indexPath: NSIndexPath) {
textField.becomeFirstResponder()
}
From there I would grab the text from the textfield and update the UILabels in my custom cell. At least this way I can select a cell and not the textfield. So considering that the answer that would fit what I wanted is combination of the replies, I thought it would be best to say it here.
Thanks to Sandeep and Larme for their time.
TVDN,
Have a textField in cell not the label :) Create a custom cell create an IBOutlet to that class ffrom textField in cellForRowAtIndexPath
let tableCell = self.tableView.dequeueReusableCellWithIdentifier("cell") as! myCell
tableCell.yourTextField.resignFirstResponder()
and in didSelectRowAtIndexPath
let tableCell = self.tableView.cellForRowAtIndexPath(indexPath)
self.tableView.dequeueReusableCellWithIdentifier("cell") as! myCell
tableCell.yourTextField.becomeFirstResponder()
Related
My question is this: Is this following approach to making a UILabel tap sensitive stylistically acceptable in the Swift 3 language? I'm tempted to say "if it compiles it flies" but I don't want to get in the habit of using this "short cut" if it is going to bite me later on. Further, if it is acceptable, are there some drawbacks to using this method that aren't obvious to a newcomer like me?
Please note that I am not looking for a way to implement code, I have one. I am asking if the solution I have is acceptable from a language style perspective.
I've been trying to get a UILabel to accept a TapGesture when inside a table cell for 2 days now and whatever method I try, there is always some sort of error even if it will compile. On a hunch, I went to my storyboard for the table view and added a button on top (not stacked, or aligned, or anything like that – actually occupying the same 2D space on the story board) within the prototype cell. I deleted the button text, linked it to the table view cell code and implemented some basic functionality to change the text on the UILabel to red and back. All of this functions exactly like I expected. I click the button and the text changes from black to red, and back when clicked again. The UILabel text is static in the table cell on a white background and my real function isn't going to change the text, it is going to alter another view through delegation from that view.
Why do it this way? Even if I check the UILabel use interaction box and follow some of the other questions and answers here to make it tap-able, I cannot control+drag the UILabel to the table view cell and make an action, the option simply doesn't exist in the pull down menu. It is available if I control+drag the UILabel to the table view controller. This makes a kind of sense to me because it is the table view controller that senses touch (right?). But, on the other hand, I have a switch in the table view cell that works just fine when I follow the answer to this question. Simple functionality of the storyboard-code interation (control+drag) is preventing me from getting what I want. Maybe control+drag should be allowing me to make an action and doesn't? I don't know. I don't want to use a UIButton alone because the text scaling feature of UILabel is really handy.
If you just want to recognize taps on the table cell, make the class the delegate of the table view
tableView.delegate = self
and implement
func tableView(_ tableView: UITableView, didSelectRowAt indexPath: IndexPath) {
//your code here
}
I'd also appreciate you taking the time to read a bit more about UITableViews. Every UITableViewCell has a label by itself. Consider the following code:
tableView.dataSource = self // this code will ideally be in init
func tableView(_ tableView: UITableView, cellForRowAt indexPath: IndexPath) -> UITableViewCell {
let cell = UITableViewCell(style: UITableViewCellStyle.default, reuseIdentifier: "lovCell")
cell.textLabel?.text = dummyData[indexPath.row]
return cell
}
I have a two-days-brain-breaking-question to all of you:
I integrated a menu in my application by using a UICollectionView (one line, horizontal scrolling, fixed number of 9 items). Every cell has an own tag and uses an own prototype cell with own identifier. During the cellForItemAtIndexPath I assign a prototype cell to every cell (the prototype cell contains the specific UIButton in the storyboard). If you click a cell (respective the UIButton) a popover should open (this is working quite well, because the popover is anchored to the collection view not to the cell - otherwise Xcode will give an error, because of an outlet bind to repeating content.). Now to the questions:
Dependently from the chosen value in the popover, the name (titleLable.text) of the button should change. I think, an IBOutlet is needed, but not usable, because of the possible (but not happened) multiple (re)use of the cell.
Some other action in the APP could happened randomly, that changes the label of the button. Therefore an IBOutlet is needed too, I think.
I tried to give the prototypes a specific tag, but this (in my opinion) could not be used, because I cannot assign the tags to an UIButton, during loading, because not all of the cells are visible and therefore not reachable in viedDidAppear...
Any help is appreciated. This is a new try for an old problem and the collectionView till yesterday looked quite promising. Any ideas to help? Thanks a lot. I can´t give code, because 90% of the work are done in IB.
you can use NSNotificationCenter to send message from your UIPopoverController to a UICollectionViewCell.
Send and receive messages through NSNotificationCenter in Objective-C?
Just subclass UICollectionViewCell to MyCollectionViewCell and use your subclass in your UICollectionView.
At the -(void)initWithFrame:(CGRect)frame method of MyCollectionViewCell you should subscribe as an observer to NSNotificationCenter, and unsubscribe in dealloc.
Than all your cells may receive notification and react to it.
This is not an optimal way of receiving callbacks, but maybe the simplest.
I'm sure this is a very noddy question, but I just can't get anything useful from the manuals.
I've a UITextField embedded in a custom UITableViewCell. If I use a delegate for the UITextView - it just gives me the UITextView.
If I link the event to the ParerentViewController, it just gives me the ID of the UITextView.
What I want to do is handle the event at the UITableViewCell level. Can I get the events from this text control to feed to the parent, and handle them at the parent level.
I don't seem to even be able to find the parent cell from the UITextField that the handler gives me. How do I find out which cell within the table the UITextField is in when I'm trying to process the events.
I have to be missing something obvious, as I've done this in earlier (pre storyboard) versions, and I'm sure it wasn't this difficult.
Answered a similar question the other day. See the accepted answer.
How can I get index path of cell on switch change event in section based table view
This will let you handle the text changes in the cell and pass them on to the table view. In your case its a UITextView and not a UISwitch.
Add properties to the cell for anything you will need inside the block code when it is called.
Create a subclass of UITableViewCell and implement the textField delegates inside the subclass. The code is lengthy but if you want I can post it when I get time.
firstly thank you in advance for any help and secondly I am very new to do the iOS development and swift so please bear with me and forgive me if I ask any stupid question.
MY ISSUE:
I created a table view and created an array of numbers. I iterated through the array and displayed each number in the array in a different table view cell. Now what I want to do is either have a button my table view cell or a check mark. And when ever I tap the button or the check mark the number that is being displayed on the table cell from the array is selected and then I tap another button or a check mark on a different cell and that number also gets selected and when I click the "done" button the both numbers are added and displayed on my root view.
Its kind of like a order taking app you can think of each cell as displaying the price of a food item and you can selected multiple food items and once you click done it adds up the price and displays it.
Im not looking for any advanced techniques, anything that can help me do this will be much appreciated. Again sorry for any stupid questions and thank you.
This is how you should break it down:
1) Implement the didSelectRowAtIndexPath delegate method after the table has been populated:
func tableView(tableView: UITableView!, didSelectRowAtIndexPath indexPath: NSIndexPath!) {
2) Within that method set the checkmark for the row:
cell.accessoryType = UITableViewCellAccessoryType.Checkmark
3) Declare a class Array:
var numberArray: [Int]
4) Finally, implement an array extension for the addition. Call it when tapping the done button:
How can we create a generic Array Extension that sums Number types in Swift?
There's some fine tuning depending on your implementation but I hope this gives you a head start.
Key things to look at:
UITableView has a var called allowsMultipleSelection. You want to set that to true (it's false by default.)
If you want to change the way a cell looks when it is selected, then you can either look into the table view's delegate didSelectRowAtIndexPath and didDeselectRowAtIndexPath. Or if you have your own subclass of UITableViewCell, you can override the setSelected:animated: method.
The basic idea is to give the user a button to say when (s)he is done selecting cells, then look at the tableView's indexPathsForSelectedRows to find out which items were selected.
I have a UITableViewCell that on touch, expands (dropdown). The user is then presented with a selection of options. When the user touches one of the options I want to briefly hide all the options, show an activity indicator spinning, display a confirmation message (on success) and then collapse the cell back to normal.
I'm having trouble hiding any object within the custom cell. The following simple code doesn't work (this is the correct superview corresponding to the cell):
var customCell: MyCustomCell = icon.superview.superview.superview as MyCustomCell
customCell.myLabel.hidden = false
I have tried hiding/showing a variety of different objects but nothing works. I've even popped it inside dispatch_async to ensure it runs on the main thread.
Additionally, Xcode 6 beta tells me that myLabel.hidden is read only. This also happens for other objects. Is this no longer the correct way to hide something?
I've had a search around but had no luck in finding an answer. If someone could help me out I'd be grateful! Thanks.
The usual way of doing something like this would be to implement the UITableViewDelegate method -tableView:didSelectRowAtIndexPath: to let you know when a row is tapped.
Then you can easily get and modify the cell
var customCell = self.tableView.cellForRowAtIndexPath(indexPath) as MyCustomCell
customCell.myLabel.hidden = false
I consider the line icon.superview.superview.superview to be a code smell. The multiple superview calls makes makes your code fragile and likely to break if you ever change the view hierarchy in your cell.