How to change colour of picker text in xCode? - ios

Question

I've finally got two pickers into one viewcontroller and i've realised they're a little tricky to see because the background is dark. How do I go about changing the colour of the pickers text?
Here's my whole view controller M
//
// ViewController.m
// Repayment Calculator
//
// Created by Stewart Piper-Smith on 04/11/2015.
// Copyright (c) 2015 Stewart Piper-Smith. All rights reserved.
//
#import "ViewController.h"
#interface ViewController ()
#end
NSArray *_pickerViewArray;
NSArray *CareerViewArray;
#implementation ViewController
#synthesize button1, textbox1, textbox2, textbox3, startingsalary, repaymentlabel, debtlabel, startingrepayments, timetakentopayoffloan, realtimetakentopayoffloan, debtamounttextfield, annualrepaymentstextfield, monthlyrepaymentstextfield,weeklyrepaymentstextfield, payoffloantextfield, testlabel, annualrepaymentstest, totaldebtamounttest, writtenofflabel,payoffloanlabel,newlabel;
- (void)didReceiveMemoryWarning {
[super didReceiveMemoryWarning];
// Dispose of any resources that can be recreated.
}
// - (IBAction)button1Press:(id)sender {
// [button1 setTitle:textbox1.text forState:UIControlStateNormal];
// }
//The start of the calculate button that starts the calculations.
-(IBAction)menucontactbuttonPress:(id)sender {
UIAlertController *alertController = [UIAlertController alertControllerWithTitle:#"Error"
message:#"Contact Form Coming Soon"
preferredStyle:UIAlertControllerStyleAlert];
//We add buttons to the alert controller by creating UIAlertActions:
UIAlertAction *actionOk = [UIAlertAction actionWithTitle:#"Ok"
style:UIAlertActionStyleDefault
handler:nil]; //You can use a block here to handle a press on this button
[alertController addAction:actionOk];
[self presentViewController:alertController animated:YES completion:nil];
}
-(IBAction)button1Press:(id)sender
{
[self.view endEditing:YES];
int x = ([textbox1.text intValue]);
int y = ([textbox2.text intValue]);
int q = ([textbox3.text intValue]);
float startingsal = ([startingsalary.text intValue]);
int debtamounttfield = ([debtamounttextfield.text intValue]);
float annualrepayments = ([annualrepaymentstextfield.text floatValue]);
//PROBLEM STARTS
float p1 = debtamounttfield /annualrepayments;//([debtamounttextfield.text intValue]);
if(isnan(p1) || isinf(p1)){
p1 = 0.00;
}
//int a = ([annualrepaymentstextfield.text intValue]);
//int b = ([debtamounttextfield.text intValue]);
//[newlabel setText:[NSString stringWithFormat:#"%#", a/b]];
[testlabel setText:[NSString stringWithFormat:#"%.01f",p1]];
[totaldebtamounttest setText:[NSString stringWithFormat:#"%d", debtamounttfield]];
[annualrepaymentstest setText:[NSString stringWithFormat:#"%#", annualrepaymentstextfield]];
[payoffloantextfield setText:[NSString stringWithFormat:#"%.01f", p1]];
//PROBLEM ENDS
[debtamounttextfield setText:[NSString stringWithFormat:#"£" "%i" , (x + y) * q]];
int arp = (startingsal - 17335)*0.09;
[annualrepaymentstextfield setText:[NSString stringWithFormat:#"£" "%i", arp ]];
if (arp < 0) {
annualrepaymentstextfield.text = #"Written Off";
}
int monthlyrepayments = (startingsal - 17335)*0.09/12;
[monthlyrepaymentstextfield setText:[NSString stringWithFormat:#"£" "%i", monthlyrepayments]];
if (monthlyrepayments < 0){
monthlyrepaymentstextfield.text = #"Written Off";
}
int weeklyrepayments = (startingsal - 17335)*0.09/12/4;
[weeklyrepaymentstextfield setText:[NSString stringWithFormat:#"£" "%i", weeklyrepayments]];
if (weeklyrepayments < 0){
weeklyrepaymentstextfield.text = #"Written Off";
}
//Error Handling
//Enter starting salary
if ([annualrepaymentstextfield.text isEqualToString: #"Written Off"]) {
UIAlertController *alertController = [UIAlertController alertControllerWithTitle:#"Debt Written Off"
message:#"As it will take you longer than 30 years to pay off the loan, the debt would be written off."
preferredStyle:UIAlertControllerStyleAlert];
//We add buttons to the alert controller by creating UIAlertActions:
UIAlertAction *actionOk = [UIAlertAction actionWithTitle:#"Ok"
style:UIAlertActionStyleDefault
handler:nil]; //You can use a block here to handle a press on this button
[alertController addAction:actionOk];
[self presentViewController:alertController animated:YES completion:nil];
}
if ([startingsalary.text isEqualToString: #""]) {
UIAlertController *alertController = [UIAlertController alertControllerWithTitle:#"Error"
message:#"Please enter your expected starting salary"
preferredStyle:UIAlertControllerStyleAlert];
//We add buttons to the alert controller by creating UIAlertActions:
UIAlertAction *actionOk = [UIAlertAction actionWithTitle:#"Ok"
style:UIAlertActionStyleDefault
handler:nil]; //You can use a block here to handle a press on this button
[alertController addAction:actionOk];
[self presentViewController:alertController animated:YES completion:nil];
}
//If course length is equal to 0
if ([textbox3.text isEqualToString: #"0"]) {
UIAlertController *alertController = [UIAlertController alertControllerWithTitle:#"Error"
message:#"Your course lenth cannot be 0 Years. Please enter a different value"
preferredStyle:UIAlertControllerStyleAlert];
//We add buttons to the alert controller by creating UIAlertActions:
UIAlertAction *actionOk = [UIAlertAction actionWithTitle:#"Ok"
style:UIAlertActionStyleDefault
handler:nil]; //You can use a block here to handle a press on this button
[alertController addAction:actionOk];
[self presentViewController:alertController animated:YES completion:nil];
}
//If course length text field is empty
if ([textbox3.text isEqualToString: #""]){
UIAlertController *alertController = [UIAlertController alertControllerWithTitle:#"Error"
message:#"Please enter your current course length"
preferredStyle:UIAlertControllerStyleAlert];
//We add buttons to the alert controller by creating UIAlertActions:
UIAlertAction *actionOk = [UIAlertAction actionWithTitle:#"Ok"
style:UIAlertActionStyleDefault
handler:nil]; //You can use a block here to handle a press on this button
[alertController addAction:actionOk];
[self presentViewController:alertController animated:YES completion:nil];
}
//time taken to pay off loan > 20 years
int newtimetaken = [timetakentopayoffloan.text intValue];
if (newtimetaken <= 20) {
writtenofflabel.text = #"WO";
}
}
-(IBAction)clearbutton:(id)sender {
[textbox1 setText:[NSString stringWithFormat:#""]];
[textbox2 setText:[NSString stringWithFormat:#""]];
[textbox3 setText:[NSString stringWithFormat:#""]];
[startingrepayments setText:[NSString stringWithFormat:#"Loan at start of repayments: "]];
[startingsalary setText:[NSString stringWithFormat:#""]];
[realtimetakentopayoffloan setText:[NSString stringWithFormat:#""]];
[debtamounttextfield setText:[NSString stringWithFormat:#""]];
[annualrepaymentstextfield setText:[NSString stringWithFormat:#""]];
[monthlyrepaymentstextfield setText:[NSString stringWithFormat:#""]];
[weeklyrepaymentstextfield setText:[NSString stringWithFormat:#""]];
[payoffloantextfield setText:[NSString stringWithFormat:#""]];
UIAlertController *alertController = [UIAlertController alertControllerWithTitle:#"Cleared"
message:#"All fields have now been cleared."
preferredStyle:UIAlertControllerStyleAlert];
//We add buttons to the alert controller by creating UIAlertActions:
UIAlertAction *actionOk = [UIAlertAction actionWithTitle:#"Ok"
style:UIAlertActionStyleDefault
handler:nil]; //You can use a block here to handle a press on this button
[alertController addAction:actionOk];
[self presentViewController:alertController animated:YES completion:nil];
}
- (void)viewDidLoad {
[super viewDidLoad];
myLabel.text = #"Use the scroller above...";
datePickerView.delegate = self;
//CareerPickerView.dataSource = self;
_pickerViewArray = #[#"Before September 2012",#"After September 2012"];
CareerViewArray = #[#"1000",#"2000"];
CareerPickerView.delegate = self;
}
-(void)pickerView:(UIPickerView *)pickerView didSelectRow:(NSInteger)row inComponent:(NSInteger)component {
if(pickerView == datePickerView)
{
NSString *dateSelected = [_pickerViewArray objectAtIndex:row];
myLabel.text = dateSelected;
}
else if(pickerView == CareerPickerView)
{
NSString *careerSelected = [CareerViewArray objectAtIndex:row];
startingsalary.text = careerSelected;
}
}
-(NSInteger)pickerView:(UIPickerView *)pickerView numberOfRowsInComponent:(NSInteger)component {
if(pickerView == datePickerView)
{
return _pickerViewArray.count;
}
else if(pickerView == CareerPickerView)
{
return CareerViewArray.count;
}
return 1;
}
-(NSInteger)numberOfComponentsInPickerView:(UIPickerView *)pickerView {
return 1;
}
-(NSString*)pickerView:(UIPickerView *)pickerView titleForRow:(NSInteger)row forComponent:(NSInteger)component {
if(pickerView == datePickerView)
{
return _pickerViewArray[row];
}
else if(pickerView == CareerPickerView)
{
return CareerViewArray[row];
}
return nil;
}
#end

Answer 1

You might require to implement UIPickerViewDelegate method -pickerView:attributedTitleForRow:forComponent:
- (NSAttributedString *)pickerView:(UIPickerView *)pickerView attributedTitleForRow:(NSInteger)row forComponent:(NSInteger)component
{
NSString *myTitle = #"my title";
NSAttributedString *myAttString = [[NSAttributedString alloc] initWithString:myTitle attributes:#{NSForegroundColorAttributeName:[UIColor whiteColor]}];
return myAttString;
}
Reference: iOS Documentation
Hope this helps.

Answer 2

you can use UIPickerView delegate method:
- (NSAttributedString *)pickerView:(UIPickerView *)pickerView attributedTitleForRow:(NSInteger)row forComponent:(NSInteger)component
{
NSString *title = self.pickerArray[row];
NSAttributedString *attString = [[NSAttributedString alloc] initWithString:title attributes:#{NSForegroundColorAttributeName:NEON_GREEN}];
return attString;
}