Resizing UITextView

Question

I have a UITextView added on my UIView. The textview added is not editable, it is just to display some data. The data displayed in the textview is

Answer 1

The answer given by @Gabe doesn't work in iOS7.1 seemingly until after viewDidAppear. See my tests below.

UPDATE: Actually, the situation is even more complicated. If you assign textView.text in the resizeTheTextView method, in iOS7, the resizing amounts to allowing for only a single line of text. Seriously odd.

UPDATE2: See also UITextView content size different in iOS7

UPDATE3: See my code at the very bottom for what I'm using now. Seems to do the job.

#import "ViewController.h"

@interface ViewController ()
{
    UITextView *textView;
}
@end

@implementation ViewController

- (void)viewDidLoad
{
    [super viewDidLoad];
    // Do any additional setup after loading the view, typically from a nib.

    textView = [[UITextView alloc] initWithFrame:CGRectMake(50, 50, 200, 1)];
    [self.view addSubview:textView];
    CALayer *layer = textView.layer;
    layer.borderColor = [UIColor blackColor].CGColor;
    layer.borderWidth = 1;

    textView.text = @"hello world\n\n";

    // Calling the method directly, after the view is rendered, i.e., after viewDidAppear, works on both iOS6.1 and iOS7.1
    UIButton *button = [UIButton buttonWithType:UIButtonTypeRoundedRect];
    [button setTitle:@"Change size" forState:UIControlStateNormal];
    [button addTarget:self action:@selector(resizeTheTextView) forControlEvents:UIControlEventTouchUpInside];
    [button sizeToFit];
    CGRect frame = button.frame;
    frame.origin.y = 400;
    button.frame = frame;
    [self.view addSubview:button];

    // Works on iOS6.1, but does not work on iOS7.1
    //[self resizeTheTextView];
}

- (void) viewWillAppear:(BOOL)animated
{
    // Does not work on iOS7.1, but does work on iOS6.1
    //[self resizeTheTextView];
}

- (void) viewDidAppear:(BOOL)animated
{
    // Does work on iOS6.1 and iOS7.1
    //[self resizeTheTextView];
}

- (void) resizeTheTextView
{
    NSLog(@"textView.frame.size.height: %f", textView.frame.size.height);

    NSLog(@"textView.contentSize.height: %f", textView.contentSize.height);

    // 5) From https://stackoverflow.com/questions/728704/resizing-uitextview
    CGRect frame = textView.frame;
    UIEdgeInsets inset = textView.contentInset;
    frame.size.height = textView.contentSize.height + inset.top + inset.bottom;
    textView.frame = frame;

    NSLog(@"inset.top: %f, inset.bottom: %f",  inset.top,  inset.bottom);

    NSLog(@"textView.frame.size.height: %f", textView.frame.size.height);

    NSLog(@"textView.contentSize.height: %f", textView.contentSize.height);
}

- (void)didReceiveMemoryWarning
{
    [super didReceiveMemoryWarning];
    // Dispose of any resources that can be recreated.
}

@end

UPDATE3:

if ([[UIDevice currentDevice] majorVersionNumber] < 7.0) {
    CGRect frame = _abstractTextView.frame;
    UIEdgeInsets inset = _abstractTextView.contentInset;
    frame.size.height = _abstractTextView.contentSize.height + inset.top + inset.bottom;
    _abstractTextView.frame = frame;
}
else {
    CGSize textViewSize = [_abstractTextView sizeThatFits:CGSizeMake(_abstractTextView.frame.size.width, FLT_MAX)];
    _abstractTextView.frameHeight = textViewSize.height;
}