How to set UIlabel TextColor Dynamically - iphone

Question

I have created more than one label using this code,
.H file
#interface ViewController : UIViewController
{
NSArray * phraseAry ;
UIView * containerView;
UILabel * oldLabel;
NSMutableArray *dataArray;
}
#property (strong, nonatomic) IBOutlet UIScrollView *myScrollView;
.M file
- (void)viewDidLoad
{
[super viewDidLoad];
heightValue = 20;
widthValue = 0;
xValue = 5;
yValue = 10;
containerView = [[UIView alloc] init];
for (int i=0; i<phraseAry.count; i++) {
widthValue = [self returnWidth:[phraseAry objectAtIndex:i]];
int newXValue = xValue+widthValue+5;
//NSLog(#"newXValue : %i",newXValue);
if (newXValue > 310) {
yValue +=20;
xValue = 5;
newXValue = xValue+widthValue+5;
UILabel *lbl = [[UILabel alloc] initWithFrame:CGRectMake(xValue, yValue, widthValue, heightValue)];
lbl.text = [phraseAry objectAtIndex:i];
[lbl setFont:[UIFont fontWithName:#"Helvetica" size:14.0]];
lbl.tag = i;
lbl.textColor = [UIColor colorWithRed:(92/255.0) green:(109/255.0) blue:(43/255.0) alpha:1];
[containerView addSubview:lbl];
xValue = newXValue;
} else {
UILabel *lbl = [[UILabel alloc] initWithFrame:CGRectMake(xValue, yValue, widthValue, heightValue)];
lbl.text = [phraseAry objectAtIndex:i];
[lbl setFont:[UIFont fontWithName:#"Helvetica" size:14.0]];
lbl.tag = i;
lbl.textColor = [UIColor colorWithRed:(92/255.0) green:(109/255.0) blue:(43/255.0) alpha:1];
[containerView addSubview:lbl];
xValue = newXValue;
}
}
containerView.frame = CGRectMake(0, 0, 320, yValue);
//add code to customize, e.g. polygonView.backgroundColor = [UIColor blackColor];
[self.myScrollView addSubview:containerView];
self.myScrollView.contentSize = containerView.frame.size;
}
And than i set background color and textcolor in specific table using this code
- (void)updateLabelMethod
{
oldLabel.backgroundColor = [UIColor clearColor];
UILabel *label = (UILabel *)[containerView viewWithTag:2];
oldLabel = label;
label.backgroundColor = [UIColor colorWithRed:(98/255.0) green:(147/255.0) blue:(216/255.0) alpha:1];
label.textColor = [UIColor whiteColor];
containerView.backgroundColor = [UIColor clearColor];
}
It will update background of label fine but when i use this code to update textcolor it will display error like this
Terminating app due to uncaught exception 'NSInvalidArgumentException', reason: '-[UIView setTextColor:]: unrecognized selector sent to instance 0xbaa3b30'
Any ways to set textcolor? Plz help.

Answer 1

Start your label tag from 1 instead of 0, because by default the tag value is 0 for all view.
lbl.tag = i+1;
Because
UILabel *label = (UILabel *)[containerView viewWithTag:0];
it will return containerView itself, and UIView not have textColor property :P

Answer 2

[containerView viewWithTag:2];
check container view has only one view that is a label with tag 2.
May be some other view is set with tag 2 and may be causing the issue.
NSLog(#"%#",label);
can give you what the label here gives the output .It should point out an UILabel itself
make use of isKindOfClass: to identify it is a label you are updating

Answer 3

for (UILable *lblTemp in containerView.subviews){
if ([lblTemp isKindOfClass:[UILable class]] && lblTemp.tag==2){
// change the lbl color
break;
}
}
check using this code ;)