how to adjust UITextview height based on String dynamically in ios - ios

Question

I have a simple textView who's data gets populated dynamically. I want to resize the height of the textview once the data is populated so that I don't see a vertical scroll nor the text gets clipped.I want to do this task programatically. I have a label which should be placed 20 px below height of textview like "interested".I am trying to making the code.But i got some problems like Alignment issues. If i can run the program the output will display like this.
this is my Program.please help me anybody.
lblHobbies = [[UILabel alloc]initWithFrame:CGRectMake(10, 310, 300, 20)];
lblHobbies.text=#"Hobbies";
lblHobbies.font=[UIFont systemFontOfSize:16.0];
lblHobbies.textColor=[UIColor colorWithRed:153.0f/255.0f green:153.0f/255.0f blue:153.0f/255.0f alpha:1];
[scrollView addSubview:lblHobbies];
lblInterests = [[UILabel alloc]initWithFrame:CGRectMake(10, 420, 300, strSize.height+30)];
lblInterests.text=#"Interests";
lblInterests.font=[UIFont systemFontOfSize:16.0];
lblInterests.textColor=[UIColor colorWithRed:153.0f/255.0f green:153.0f/255.0f blue:153.0f/255.0f alpha:1];
[scrollView addSubview:lblInterests];
NSDictionary *attributes = #{NSFontAttributeName: [UIFont systemFontOfSize:14]};
CGRect rect =
[tViewhobbies.text boundingRectWithSize:CGSizeMake(300, MAXFLOAT)
options:NSStringDrawingUsesLineFragmentOrigin
attributes:attributes
context:nil];
tViewhobbies=[[UITextView alloc]init];
tViewhobbies.frame=CGRectMake(10, 330,300, rect.size.height);
[tViewhobbies setUserInteractionEnabled:NO];
tViewhobbies.backgroundColor=[UIColor colorWithRed:0.662745 green:0.662745 blue:0.662745 alpha:0.5];
tViewhobbies.delegate=self;
[scrollView addSubview:tViewhobbies];
NSDictionary *attributes1 = #{NSFontAttributeName: [UIFont systemFontOfSize:14]};
CGRect rect1 =
[tViewInterests.text boundingRectWithSize:CGSizeMake(300, MAXFLOAT)
options:NSStringDrawingUsesLineFragmentOrigin
attributes:attributes1
context:nil];
tViewInterests=[[UITextView alloc]init];
tViewInterests.frame=CGRectMake(10, 450, 300, rect1.size.height);
[tViewInterests setUserInteractionEnabled:NO];
tViewInterests.backgroundColor=[UIColor colorWithRed:0.662745 green:0.662745 blue:0.662745 alpha:0.5];
tViewInterests.delegate=self;
[scrollView addSubview:tViewInterests];

Answer 1

go through below code hope helps u
self.scrollView.contentSize = CGSizeMake(320, 700);
UILabel *lblHobbies = [[UILabel alloc]initWithFrame:CGRectMake(self.scrollView.bounds.origin.x + 2, self.scrollView.bounds.origin.y + 2, 75, 40)];
lblHobbies.text=#"Hobbies";
lblHobbies.font=[UIFont systemFontOfSize:16.0];
lblHobbies.textColor=[UIColor colorWithRed:153.0f/255.0f green:153.0f/255.0f blue:153.0f/255.0f alpha:1];
[self.scrollView addSubview:lblHobbies];
//add this after the hobbies textview so u need to calculate the height, so wy dont you put some helper method that returns the height for the text
//i took some long text that u want to display
NSString *str = #"BARCELONA, Spain -- Nokia is targeting emerging markets with three low-cost smartphones that use Google's Android operating system rather than the Windows Phone software from Microsoft, which is about to buy Nokia's phone business";
CGSize hobbiesTextViewSize = [self calculateHeightForString:str];
//now set the hobbiesTextView frame and also the text
UITextView *tViewhobbies = [[UITextView alloc]initWithFrame:CGRectMake(self.scrollView.bounds.origin.x + 2, self.scrollView.bounds.origin.y + 40, hobbiesTextViewSize.width, hobbiesTextViewSize.height+ 5)];
tViewhobbies.font = [UIFont systemFontOfSize:17.0f];
tViewhobbies.text = str;//set the text hear
[self.scrollView addSubview:tViewhobbies];
//now add the lblInterests label
UILabel *lblInterests = [[UILabel alloc]initWithFrame:CGRectMake(self.scrollView.bounds.origin.x + 2, self.scrollView.bounds.origin.y + lblHobbies.frame.size.height + hobbiesTextViewSize.height + 2, 75, 40)];
lblInterests.text=#"Interests";
lblInterests.font=[UIFont systemFontOfSize:16.0];
lblInterests.textColor=[UIColor colorWithRed:153.0f/255.0f green:153.0f/255.0f blue:153.0f/255.0f alpha:1];
[self.scrollView addSubview:lblInterests];
NSString *str1 = #"Nokia will ditch many of the Google services that come with Android, which Google lets phone makers customize at will. Instead, the new Nokia X line announced Monday will emphasize Microsoft services such as Bing search, Skype communications and OneDrive file storage. Its home screen sports larger, resizable tiles resembling those on Windows phone.";
//now calculate the height for Interests text
CGSize interestTextViewSize = [self calculateHeightForString:str1];
UITextView *tViewInterests = [[UITextView alloc]initWithFrame:CGRectMake(self.scrollView.bounds.origin.x + 2, self.scrollView.bounds.origin.y + lblHobbies.frame.size.height + lblInterests.frame.size.height + tViewhobbies.frame.size.height + 4, interestTextViewSize.width + 2, interestTextViewSize.height+ 2)];
tViewInterests.font = [UIFont systemFontOfSize:17.0f];
tViewInterests.text = str1;
[self.scrollView addSubview:tViewInterests];
}
//our helper method
- (CGSize)calculateHeightForString:(NSString *)str
{
CGSize size = CGSizeZero;
UIFont *labelFont = [UIFont systemFontOfSize:17.0f];
NSDictionary *systemFontAttrDict = [NSDictionary dictionaryWithObject:labelFont forKey:NSFontAttributeName];
NSMutableAttributedString *message = [[NSMutableAttributedString alloc] initWithString:str attributes:systemFontAttrDict];
CGRect rect = [message boundingRectWithSize:(CGSize){320, MAXFLOAT}
options:NSStringDrawingUsesLineFragmentOrigin
context:nil];//you need to specify the some width, height will be calculated
size = CGSizeMake(rect.size.width, rect.size.height + 5); //padding
return size;
}

Answer 2

Here is how I did it:
+(CGFloat)getLabelDymanicHeightOfStringWithText:(NSString *)text andFont:(UIFont *)font andFrame:(CGRect )frame {
CGSize maxSize = CGSizeMake(frame.size.width, 999999.0);
int height = 0;
NSDictionary *attributesDictionary = [NSDictionary dictionaryWithObjectsAndKeys:
font, NSFontAttributeName,
nil];
if (IS_IOS_6)//iOS 6 macro
{
CGSize size = [text sizeWithFont:font
constrainedToSize:maxSize
lineBreakMode:NSLineBreakByWordWrapping];
height = size.height;
}
else
{
CGRect frame = [text boundingRectWithSize:maxSize
options:NSStringDrawingUsesLineFragmentOrigin
attributes:attributesDictionary
context:nil];
height = frame.size.height;
}
return height+5;
}
Pass this method your text text font and frame.

Answer 3

You can use custom UITextView to fix the problem:
Kindly check it out: https://github.com/HansPinckaers/GrowingTextView
Textview will set height dynamically based on input string from the user.
Hope, This will help you,
:)

Answer 4

enter code hereYou can use label.
myLabel.text = #"Your String";
CGSize labelSize = [myLabel.text sizeWithFont:myLabel.font
constrainedToSize:CGSizeMake(320,MAX_HEIGHT_YOU_WANT_TO_SET)
lineBreakMode:NSLineBreakByWordWrapping];
CGRect frame = myLabel.frame;
frame.size.height = labelSize.height;
myLabel.frame = frame;

Answer 5

you can simply change the height of the textView to the height of the textView.contentSize.height. Doing this you textView will update and show all the text it contains.
textView.frame = CGRectMake(textView.frame.origin.x, textView.frame.origin.y, textView.frame.size.width,textView.contentSize.height);
Hope this helps you.
Happy Coding :)