I have two UIPickerview, pickerView1 and pickerView2 in my view controller.
What I want to achieve here is when I select a string from my pickerView1, it automatically changes the strings for the pickerView2.
I created a section 3 because there was a lot of strings, ideally I want this all in section 1, as I currently have my code set to 3 picker views but I only want two picker views.
Here is an example.
Pickerview1 contains "a","b","c","d".
If "a" is selected, the pickerView2 would show specific strings for that to choose from, if I choose "b" then the strings for "a" would not show but the strings for "b" would show separately.
In section 2 I want each of those fields to correspond with the sub strings that are defined in section 1 and section 3, this then populates the second UIpickerview, so every time i select a string in the first picker view the second uipickerview generates the specific strings for that.
Here is my code:
//PickerView Category IBOutlets
@IBOutlet var pickerView1: UIPickerView! = UIPickerView()
@IBOutlet var pickerView2: UIPickerView! = UIPickerView()
@IBOutlet var pickerView3: UIPickerView! = UIPickerView()
@IBOutlet var textField1: UITextField! = UITextField()
@IBOutlet var textField2: UITextField! = UITextField()
@IBOutlet var textField3: UITextField! = UITextField()
var SECTION2 = ["Select", "Criminal Activity", "Begging","Harassment", "Criminal Damage", "Disruption Of Service", "Drunken Behaviour","Fare Evasion", "Feet on Seats", "Hate Crime", "Inappropriate Sexual Behaviour", "Litter", "Missile Throwing", "Noise","Rowdy Behaviour", "Smoking Tobacco", "Drugs", "Threats/abuse/intimidation towards Staff", "Threats/abuse/intimdation towards Passengers" ]
var SECTION1 = ["Select", "*>>>Criminal Activity<<<*", "Assault", "Arson", "Trespass", "Spitting", "*>>>Begging<<<*", "On Board", "Off Board", "*>>>Harassment<<<*", "Stalking", "On Board", "At Stop/Station", "Bullying", "*>>>Criminal Damage<<<*", "Damage to Exterior", "Damage to Interior", "Glass Breakage","Grafitti", "Window Etching", "*>>>Disruption Of Service<<<*", "Interfering with the engine", "Opening emergency exits", "Pressing emergency stop/handles", "Throwing debris on to the line/track", "*>>>Drunken Behaviour<<<*", "Drinking on the mode of transport", "Drinking in the station/stop", "Aggressive Drunks", "*>>>Fare Evasion<<<*", "Fraudulent Pass", "None payment of fare", "*>>>Feet on Seats<<<*", "Purposeful Obstruction" ]
var SECTION3 = ["Select", "*>>>Hate Crime<<<*", "Disability", "Ethnicity", "Gender", "Race","Religion", "Sexual Orientation", "*>>>Litter<<<*", "On Board", "At station/stop", "*>>>Missile Throwing<<<*", "Stone Throwing", "Throwing Objects", "*>>>Noise<<<*", "Inappropriate Musical Content", "Loud Music", "*>>>Rowdy Behaviour<<<*", "School Children", "Shouting/Swearing", "Within Shelter", "Within Station/Stop"," Groups/Gangs", "*>>>Smoking Tobacco<<<*", "On Board", "At station/stop", "*>>>Drugs<<<*", "Smoking Drugs", "Drug Paraphernalia", "Drug Taking", "Drug Dealing", "*>>>Threats/abuse/intimidation towards Staff<<<*", "On Board", "At station/stop", "*>>>Threats/abuse/intimidation towards Passengers<<<*", "On Board", "At station/stop" ]
override func viewDidLoad() {
super.viewDidLoad()
var Viewcontroller: () =
pickerView1 = UIPickerView()
pickerView2 = UIPickerView()
pickerView3 = UIPickerView()
pickerView1.delegate = self
pickerView2.delegate = self
pickerView3.delegate = self
self.textField1.inputView = self.pickerView1;
self.textField2.inputView = self.pickerView2;
self.textField3.inputView = self.pickerView3;
pickerView1.tag = 0
pickerView2.tag = 1
pickerView3.tag = 2
textField1.inputView = pickerView1
textField2.inputView = pickerView2
textField3.inputView = pickerView3
}
func numberOfComponentsInPickerView(pickerView: UIPickerView) -> Int {
return 1
}
func pickerView(pickerView: UIPickerView, numberOfRowsInComponent component: Int) -> Int {
if pickerView.tag == 0 {
return SECTION1.count
} else if pickerView.tag == 1 {
return SECTION2.count
} else if pickerView.tag == 2 {
return SECTION3.count
}
return 1
}
func pickerView(pickerView: UIPickerView, titleForRow row: Int, forComponent component: Int) -> String! {
if pickerView.tag == 0 {
return SECTION1[row]
} else if pickerView.tag == 1 {
return SECTION2[row]
} else if pickerView.tag == 2 {
return SECTION3[row]
}
return ""
}
func pickerView(pickerView: UIPickerView, didSelectRow row: Int, inComponent component: Int) {
if pickerView.tag == 0 {
textField1.text = SECTION1[row]
} else if pickerView.tag == 1 {
textField2.text = SECTION2[row]
} else if pickerView.tag == 2 {
textField3.text = SECTION3[row]
}
}
}
set the global variables
var data1:NSMutableArray=["Apple","Mango","Banana"]
var data2:NSMutableArray=[["greenApple","whiteApple","yellowApple"],["greenMango","whiteMango","yelloMango"],["greenBanana","whiteBanana","yellowBanana"]]
var data3:NSArray = []
Set the tags for pickerViews - pickerView1 (say 1) and pickerView2 (say 2).
override func viewDidLoad() {
super.viewDidLoad()
pickerView1.tag=1;
pickerView2.tag=2;
data3=["greenApple","whiteApple","yellowApple"] //initialise the array with the data
}
set the title in delegate method
func pickerView(pickerView: UIPickerView, titleForRow row: Int, forComponent component: Int) -> String! {
if pickerView.tag==1 {
return data1[row] as! String
}
else {
return data3[row] as! String
}
}
In selection delegate if the picker one is selected then assign the data3 with the required data based on pickerView1 selection and reload the pickerView2
func pickerView(pickerView: UIPickerView,
didSelectRow row: Int,
inComponent component: Int)
{
if pickerView.tag==1 {
data3=data2[row] as! NSArray
pickerView2.reloadAllComponents() // reload pickerview2
}
}