how to pass the bool values to next view controller

Question

I have 2 VC :

FirstVc in that i have one textfield NamesTF . secondVC i need to check whether in FirstVc the NamesTF have values are not. If values is available my bool value have to come True .If values is not available bool value have to come False My code :

FirstVc :

 let storyboard = UIStoryboard(name: "DashBoard", bundle: nil)
        let destinationVc = storyboard.instantiateViewController(withIdentifier: "SecondVC")

if NamesTF.text == "" {

 SecondVC.NameAvailable = false
 self.navigationController?.pushViewController(destinationVc, animated: true)
}

else 
{
 SecondVC.NameAvailable = false
 self.navigationController?.pushViewController(destinationVc, animated: true)
}

In my SecondVC:

 var NameAvailable = false

override func viewWillAppear(_ animated: Bool) {

if NameAvailable == true {

// print the name

}
else {

// no name availble //false
}
}

What i am doing wrong. Can any one help me out.

Thanks ~

Where are these `SecondVC` and `AllOperatorNewVC` coming from? — Adeel Miraj, Oct 28 '17 at 06:22
@Adeel Sorry its my code mistake. Now i have the correct one. Please check my post. — david, Oct 28 '17 at 06:23
It still doesn't make sense. You are setting the `Bool` in `SecondVC` and pushing `destinationVc`. Set the bool in `destinationVc` like this `destinationVc.NameAvailable = true`. — Adeel Miraj, Oct 28 '17 at 06:27
@Adeel Actulay i dont know how to code for this. So only i have explained what i need at first in post — david, Oct 28 '17 at 06:29
Possible duplicate of [Passing Data between View Controllers](https://stackoverflow.com/questions/5210535/passing-data-between-view-controllers) — Tushar Sharma, Oct 28 '17 at 06:37
@Tushar Sharma i want to check with bool . not in passing the string — david, Oct 28 '17 at 06:40
@david the concept of passing values never change either bool, string , array etc. — Tushar Sharma, Oct 28 '17 at 06:50
I tried like below solution sir. Not able to get.So only Posted. Even i tried below solution too' — david, Oct 28 '17 at 06:51

score 1 · Answer 1 · edited Oct 28 '17 at 06:57

1

You are pushing the 'destinationVc' so your code should be like:

    let storyboard = UIStoryboard(name: "DashBoard", bundle: nil)
    let destinationVc = storyboard.instantiateViewController(withIdentifier:"SecondVC")
    destinationVc.NameAvailable = !(NamesTF.text == "")
    self.navigationController?.pushViewController(destinationVc, animated: true)

edited Oct 28 '17 at 06:57

Abhishek Thapliyal

3,497
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answered Oct 28 '17 at 06:29

SandeepM

2,601
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I am getting error like `instance member 'NameAvailable' cannot be used on type 'secondVC` – david Oct 28 '17 at 06:33
Where you have defined 'CircleNameAvailable' ? In the SecondVC you defined 'NameAvailable'. – SandeepM Oct 28 '17 at 06:44
Sorry `var NameAvailable : Bool?` Like that i declared in My `secondVC` – david Oct 28 '17 at 06:46
@Abhishek Thapliyal `NameAvailable` should be `bool` value or `string` in my `seconsVC` – david Oct 28 '17 at 06:59
it should be Bool @david – Deepraj Chowrasia Oct 28 '17 at 07:08
How a variable can string or bool same time – Abhishek Thapliyal Oct 28 '17 at 07:14

Deepraj Chowrasia · Accepted Answer · 2017-10-28T07:18:28.443

You code should be something like this. The mistake you are doing in your code is that you are assigning false value to the Bool variable NameAvailable in your secondVC, so whatever calue weather true or false you are passing from firstVc is overriding to false every time in the secondVC

First VC

let storyboard = UIStoryboard(name: "DashBoard", bundle: nil)
        let destinationVc = storyboard.instantiateViewController(withIdentifier: "SecondVC")

if NamesTF.text == "" {

 destinationVc.NameAvailable = true
 self.navigationController?.pushViewController(destinationVc, animated: true)
}

else 
{
 destinationVc.NameAvailable = false
 self.navigationController?.pushViewController(destinationVc, animated: true)
}

In Your Second VC

var NameAvailable = Bool()


override func viewWillAppear(_ animated: Bool) {

if NameAvailable == true {

// print the name

}
else {

// no name availble //false
}

Try it it will definitely work :)

score 1 · Answer 3 · answered Oct 28 '17 at 11:42

let storyboard = UIStoryboard(name: "DashBoard", bundle: nil)
let destinationVc = storyboard.instantiateViewController(withIdentifier:"SecondVC") as! SecondVC
destinationVc.NameAvailable = !(NamesTF.text == "")
self.navigationController?.pushViewController(destinationVc, animated: true)

how to pass the bool values to next view controller

3 Answers3