Dynamic height for textview in ios? - objective-c

Question

I have added a UITextView inside a UIView. UIView has some height depending upon screen sizes. UITextView can have more or less text. So I want to make the height of UITextView dynamic so if text is more then it should have more height but it should be less than the height of main view . If text is less then it should have less height.

Answer 1

Size a UITextView to its content programmatically:
UITextView *textView = [[UITextView alloc] initWithFrame:CGRectMake(100, 100, 100, 100)];
[textView setDelegate:self];
[textView setText:#"your long text"];
[textView setScrollEnabled:NO];
[self.view addSubview:textView];
CGFloat fixedWidth = textView.frame.size.width;
CGSize newSize = [textView sizeThatFits:CGSizeMake(fixedWidth, MAXFLOAT)];
CGRect newFrame = textView.frame;
newFrame.size = CGSizeMake(fmaxf(newSize.width, fixedWidth), newSize.height);
textView.frame = newFrame;

Answer 2

If you are using textview to display multilines of text with scrolling disabled, It is nothing more than a UILabel. I suggest you to use UILabel for the purpose.
In the storyboard, set the constraints as follows:
and set the line break as word wrap:

Answer 3

Same as the first answer, but in Swift 4:
let screenSize = UIScreen.main.bounds
let textView = UITextView.init(frame: CGRect(x: 1, y: 40, width: screenSize.width, height: screenSize.height))
textView.delegate = self as? UITextViewDelegate
textView.isScrollEnabled = false
view.addSubview(textView)
let fixedWidth = textView.frame.size.width
let newSize: CGSize = textView.sizeThatFits(CGSize(width: fixedWidth, height: CGFloat(MAXFLOAT)))
var newFrame = textView.frame
newFrame.size = CGSize(width: CGFloat(fmaxf(Float(newSize.width), Float(fixedWidth))), height: newSize.height)

Answer 4

Try with this
-(void)dynamicTextSize{
UITextView *textView = [[UITextView alloc]initWithFrame:CGRectMake(200, 300, 200, 30)];
textView.center = self.view.center;
[self.view addSubview:textView];
NSString *string = #"This is pour text.a hjajksdkja kajhdsjk akjdhs jakhd skjahs ajkdhsjkad hskja akjdhs ajkhdjskar";
textView.text = string;
//UIFont *font = [UIFont fontWithName:#"Arial" size:16.0f];
NSDictionary *attrDict = [NSDictionary dictionaryWithObjectsAndKeys:textView.font, NSFontAttributeName, nil];
textView.backgroundColor = [UIColor lightGrayColor];
CGRect frame = [textView.text boundingRectWithSize:CGSizeMake(textView.frame.size.width, 10000) options:NSStringDrawingTruncatesLastVisibleLine|NSStringDrawingUsesLineFragmentOrigin attributes:attrDict context:nil];
CGRect mFrame = textView.frame;
mFrame.size.width = frame.size.width;
mFrame.size.height = frame.size.height;
textView.frame = mFrame;
//NSLog(#"frame2:%#",NSStringFromCGRect(textView.frame));
}