How to calculate TextView height base on text

Question

I am using the code below for calculate the height of text, then set this height for UILabel and UITextView

CGSize targetSize = CGS         


        

Answer 1

There are two things you can try:

1. Set textView.textContainerInset = UIEdgeInsetsZero
2. Set textView.textContainer.lineFragmentPadding = 0

With these operations you can get rid of all the padding in the textView and when its width matches with the label's one the heights are also the same.

Here's a sample code you can place in an empty viewController and test it yourself:

- (void)viewDidAppear:(BOOL)animated {
    [super viewDidAppear:animated];

    NSString *text = @"The internet connection appears to be offline.";
    CGFloat width = 100.f;

    UITextView *textView = [[UITextView alloc] initWithFrame:CGRectMake(20, 20, width, 300)];
    textView.font = [UIFont fontWithName:@"AvenirNext-Regular" size:12.f];
    textView.text = text;
    [self.view addSubview:textView];

    UILabel *label = [[UILabel alloc] initWithFrame:CGRectMake(20 + width, 20, width, 300)];
    label.numberOfLines = 0;
    label.font = [UIFont fontWithName:@"AvenirNext-Regular" size:12.f];
    label.text = text;
    [self.view addSubview:label];

    // Getting rid of textView's padding
    textView.textContainerInset = UIEdgeInsetsZero;
    textView.textContainer.lineFragmentPadding = 0;

    // Setting height of textView to its contentSize.height
    CGRect textViewFrame = textView.frame;
    textViewFrame.size = textView.contentSize;
    textView.frame = textViewFrame;

    // Setting height of label accorting to it contents and width
    CGRect labelFrame = label.frame;
    labelFrame.size = [label sizeThatFits:CGSizeMake(width, HUGE_VALF)];
    labelFrame.size.width = width;
    label.frame = labelFrame;

    NSLog(@"Label bounds: %@", NSStringFromCGRect(label.bounds));
    NSLog(@"TextView bounds: %@", NSStringFromCGRect(textView.bounds));

    // Visualizing final effect with borders
    textView.layer.borderColor = [UIColor redColor].CGColor;
    textView.layer.borderWidth = 1.f;
    label.layer.borderColor = [UIColor greenColor].CGColor;
    label.layer.borderWidth = 1.f;
}

Console output:

2016-09-01 14:29:06.118 stack39268477[943:243243] Label bounds: {{0, 0}, {100, 66}}
2016-09-01 14:29:06.119 stack39268477[943:243243] TextView bounds: {{0, 0}, {100, 66}}