I have a problem here..
So, I am using cocoapods for dropdown and table view controller,
and I want to hide the next cell if the dropdown says "Yes", and keep the next cell
when I hit " No ".
How do I do that?
How do I hide the next section?
Here my code & visual image.
Any help will be appreciated.
Thankyou
#IBAction func btnTapped(_ sender: Any) {
DropDown.show()
let choosen = DropDown.indexForSelectedRow
if choosen == 0 {
self.section2.isHidden = true
}
else if choosen == 1 {
self.section2.isHidden = false
}
}
Your dropdown function in getting called on button tap. You should use the delegate method of your dropdown function to know once user has chosen a value. Then inside that function you can hide unhide your cells.
Related
Initially I had two buttons with titles: "+" and "-". Both buttons are located in table cell. I have used protocol and delegate to pass value from button title to function call which depends on input params. If input parameter is "-" - decrease value, if "+" - increase.
But later I removed titles and replaced buttons with respective images. And here I faced an issue - I cannot call function properly because title is blank.
I have implemented the following workaround. I have set Accessibility Identifier for both buttons. For example for +:
And in cell class I used accessibilityIdentifier:
#IBAction func didPressOrderCellButton(_ sender: UIButton) {
cellDelegate?.didPressOrderCellButton(order: order!, menuItem: menuItem!, action: sender.accessibilityIdentifier!)
}
But... I have some doubts if it's proper way to do this. Will it create any issues in future if I decide to work with accessibility feature?
I do not want to use title and add code to ViewController class to hide it every time view is loaded or appeared. I want to avoid such solutions in my code because it's too difficult to support such solutions I believe.
I have tried to find another button identifier that I can use, but didn't succeed.
The simple approach would be just set the tag value inside your button and then check the same tag value and perform your operation Plus or Minus accordingly.
For instance:-
if sender.tag == 0 {
//Do minus
} else if sender.tag == 1 {
//Do plus
}
I work on Swift 3, and I'm trying to make checkboxes that behave like radio buttons. I explain myself : I have 8 buttons ; each has an "unchecked" image and a "checked" image. I want only 1 button to be selected (so, showing ITS "checked" image) at the time. The principle of radio buttons.
So I tried using the #IBAction with each button, I've this :
#IBAction func tona1_changed(_ sender: Any) {
if test_tona1.isSelected == true
{
test_tona1.setBackgroundImage(UIImage(named: "0b_unchecked"), for: UIControlState.normal)
test_tona1.isSelected = false
}
else
{
test_tona1.setBackgroundImage(UIImage(named: "0b_checked"), for: UIControlState.normal)
test_tona1.isSelected = true
}}
It actually make the image switch between "uncheck" and "check" but I don't know at all how to make it interact with the other buttons.
I tried using an array with the buttons's tags inside but I didn't have something working. I also tried to make a class but I don't know how it can work.
Thanks!
You can achieve that in several ways. One of the most trivial would be to:
Have a datasource. Most of the time an array.
Create an UIButton for each item in your datasource, and insert each button into another array. Each button would have a tag corresponding at the
index of the array. Also set different images for selected state and normal.
Add an action for each button, with the target function being something like:
func buttonPressed(sender:UIButton) {
for button in buttons {
button.isSelected = false
// deselect your model datasource[button.tag]
}
sender.isSelected = true
// select your model datasource[button.tag]
}
I leave the abstraction / improvements / safety to you. The key point is just to use a collection of buttons, iterate through them, and select / deselect them accordingly, and not using a big if/else checking for the button tag everytime.
I have a tableView in my app. and in my app users can like a post (best example is instagram). when I like a post my button state change to active and button's color change. but when I scroll the tableView button state back to normal. I know it happen because cell reload again, but what is the best solution for this problem? am I have to overtime that I press like button app send like request and tableview reloadData? (this is not good for server)
EDIT: I have a flag for button, but when I press like button I have to send request and fetch dataArray again. but how can change button state and send like request but not fetch dataArray. it will happen when user manually refresh data.
thanks.
You can set using if and else condition. see below example
if model.data.isFav == true
{
btnFav.selected = true
}
else
{
btnFav.selected = false
}
If you have any flag for button with Posts in your dataArray from which you are loading cells data then you can use that flag to set the color of button. It will take care at the time of scroll.
Set button type to custom in the navigation inspector, then set the background image for default and selected. then use the code below:
// MARK: Set fav button Action
func setFavButtonAction(_ sender : UIButton) {
print(sender.tag)
if sender.isSelected == true {
sender.isSelected = false
}else{
sender.isSelected = true
}
}
I have an app with some buttons, when those buttons are pressed the image on them should change. I assume that the TouchUpInside runs when you tap and remove the finger while still holding inside the area of the element, however it only works rarely and I'm not sure why.
The reason I use TouchUpInside instead of TouchDown is because I want the user to be able to cancel the action.
I'm sorry if I've misunderstood anything about those events and if this has already been asked. I couldn't find an answer to my problem searching the web.
//The IBAction is set to trigger on TouchUpInside
#IBAction func action11(sender: UIButton) {
setTile(sender)
}
func setTile(sender: UIButton) {
if turn {
print("O's turn")
sender.setImage(xTile, forState: .Normal)
turn = false
}
}
EDIT: Added the necessary code
There are some properties of UIButtons which you can use to achieve what you want.
You can use Default and selected state of uibutton to set two different images.
In XIB select state "Default" and assign default image to that state again select state to "Selected" and assign image which you want after button section.
and add following line in button selection method.
-(IBAction)buttonTapped:(UIButton *)sender{
sender.selected = !sender.selected;
}
Your understanding is correct, you need to use touchUpInside.
I assume you are trying to create a button that has a toggle function. On one touch you want the button to have the value Say "X" and when touched again the button has a value "O".
Take a look at this code below, this should do the job.
class ViewController: UIViewController {
var isButtonPressed = false{
// Adding a Property Observer, that reacts to changes in button state
didSet{
if isButtonPressed{
// Set the Value to X.
}else{
// Set the Value to O.
}
}
}
#IBAction func changeButtonValue(sender: UIButton) {
// Toggle the button value.
isButtonPressed = !isButtonPressed
}
}
If you don't set turn=true after the first time, this code is executed it will be executed only one.
if turn {
print("O's turn")
sender.setImage(xTile, forState: .Normal)
turn = false
}
Check if the button frame is large enough to get finger touch.
Apple says at least 35x35 pixel.
In the initial set up of my app I need the user to chose a genre type. i have it set up such that the user selects from a list of UIButtons which are all different genre types. I need this genre selection to save to the users profile. The next view controller is the same set up as the genreVC but asking for instrument instead of genre. The next segue from here is to view controller 3 the usersVC profile and it should have saved which two buttons were selected on the previous two VC's by updating a label. I have tagged each button with a number and have tried next to everything.
How do I save which button has been pressed on a different view controller to the users profile and update the label on the users profile to the name of the button pressed?
I am using each button individually and have them tagged as such as seen here:
#IBAction func popGenreButton(sender: UIButton) {
if(sender.tag == 6){
print("Pop genre selected")
}
}
#IBAction func altGenreButton(sender: UIButton) {
if(sender.tag == 7){
print("Alternative genre selected")
}
}
#IBAction func electronicGenreButton(sender: UIButton) {
if(sender.tag == 8){
print("Electronic genre selected")
}
}
I also tried adding each button into genreSelection as shown below that didn't work so I stuck with the individual buttons above.
#IBAction func genreSelectionButton(sender: UIButton) {
print(sender.titleLabel!.text!)
genreResult.text = genreString + " genre has been saved to your profile"
}
I also created a nib with myModalDelegate and protocol and nope.
I thought maybe I could create a genre array and when a certain button is selected it calls a certain item from the array and updates that item to the label but I was unsure how to go about this too.
I am using Xcode 7 and Swift 2.0 and Parse as my cloud server.
As you can see I have a lot to learn yet with Swift. I have been searching how to do this for the past week and can't figure it out. I am a 'lot' out of my depth but want to figure it out, if anyone can help that would be great!
A simple solution would be something like creating a global store for those values
i.e.
struct Choices {
static var genre: String?
static var instruments: String?
}
then you could in your different view controllers write and read from it by simply
Choices.instrument = "trumpet"
or
label.text = Choices.genre
A prettier solution would be to create a similar class as the previous struct but not have the variables static. You could then pass it along and fill up with the values from each VC and use the values in the last VC where you are setting the label text