Why UIView size is changed by adding label on it? - ios

Question

I have Manager UIViewController class. Draw Chart UIView is one of the components in Manager ViewController. It is shown in the attached picture.
In Manager.m, I set the size of DrawChart UIView.
- (IBAction)viewRecordButtonisPressed:(id)sender {
//set UIView size
CGRect frame = self.drawChart.frame;
frame.origin.x = 0;
frame.origin.y = (int)((float)self.view.bounds.size.height/6.0);
frame.size.width = self.view.bounds.size.width;
frame.size.height = (int)((float)self.view.bounds.size.height*(2.0/3.0));
self.drawChart.frame = frame;
self.drawChart.hidden = NO;
[self.drawChart setNeedsDisplay];
}
Then in DrawChart.m, I added three labels. Then Draw Chart's UIView size is changed. How to write on UIView without changing the UIView's size?
- (void)drawRect:(CGRect)rect {
if(![currentNameID isEqualToString:#""]){
[self extractInformation];
UILabel *idLabel = [[UILabel alloc] initWithFrame:CGRectMake(10, 10, 300, 20)];
[idLabel setTextColor:[UIColor whiteColor]];
[idLabel setBackgroundColor:[UIColor clearColor]];
[idLabel setFont:[UIFont fontWithName: #"Didot-Italic" size: 15.0f]];
NSString* idtext = #"ID: ";
idLabel.text = [idtext stringByAppendingString:currentNameID];
[self addSubview:idLabel];
UILabel *dobLabel = [[UILabel alloc] initWithFrame:CGRectMake(10, 30, 300, 20)];
[dobLabel setTextColor:[UIColor whiteColor]];
[dobLabel setBackgroundColor:[UIColor clearColor]];
[dobLabel setFont:[UIFont fontWithName: #"Didot-Italic" size: 15.0f]];
idtext = #"DOB: ";
dobLabel.text = [idtext stringByAppendingString:dob];
[self addSubview:dobLabel];
UILabel *genderLabel = [[UILabel alloc] initWithFrame:CGRectMake(10, 50, 300, 20)];
[genderLabel setTextColor:[UIColor whiteColor]];
[genderLabel setBackgroundColor:[UIColor clearColor]];
[genderLabel setFont:[UIFont fontWithName: #"Didot-Italic" size: 15.0f]];
idtext = #"Gender: ";
genderLabel.text = [idtext stringByAppendingString:gender];
[self addSubview:genderLabel];
}
}

Answer 1

Not sure what the problem is. The way I solved is I used CoreGraphic to write text. It doesn't change the UIView's size.
I replaced with
- (void)drawRect:(CGRect)rect {
if(![currentNameID isEqualToString:#""]){
[self extractInformation];
NSDictionary *textAttributes = #{NSFontAttributeName: [UIFont fontWithName: #"Didot-Italic" size: 15.0f], NSForegroundColorAttributeName:[UIColor whiteColor]};
// Create string drawing context
NSStringDrawingContext *drawingContext = [[NSStringDrawingContext alloc] init];
CGRect drawRect = CGRectMake(10, 10, 300, 20);
NSString* idtext = #"ID: ";
idtext = [idtext stringByAppendingString:currentNameID];
[idtext drawWithRect:drawRect
options:NSStringDrawingUsesLineFragmentOrigin
attributes:textAttributes
context:drawingContext];
CGRect drawRect1 = CGRectMake(10, 30, 300, 20);
idtext = #"DOB: ";
idtext = [idtext stringByAppendingString:dob];
[idtext drawWithRect:drawRect1
options:NSStringDrawingUsesLineFragmentOrigin
attributes:textAttributes
context:drawingContext];
CGRect drawRect2 = CGRectMake(10, 50, 300, 20);
idtext = #"Gender: ";
idtext = [idtext stringByAppendingString:gender];
[idtext drawWithRect:drawRect2
options:NSStringDrawingUsesLineFragmentOrigin
attributes:textAttributes
context:drawingContext];
}
}