Sample Code for Reproducing Infinite Recursion changing frame during setContentSize: for UITextView

gistfile1.m

#import "ViewController.h"

@interface TextView : UITextView
@end

@implementation TextView

- (void)setContentSize:(CGSize)contentSize {
    CGRect frame = self.frame;
    frame.size.height = contentSize.height + 5;
    self.frame = frame;
    [super setContentSize:contentSize];
}

@end

@interface ViewController ()

@end

@implementation ViewController {
    UITextView *_textView;
}

- (void)loadView {
    [super loadView];
    
    CGRect rootFrame = self.view.frame;
    TextView *textView = [[TextView alloc] initWithFrame:CGRectMake(0, 88, CGRectGetWidth(rootFrame), 40)];
    textView.textColor = UIColor.blackColor;
    textView.layer.borderColor = UIColor.blackColor.CGColor;
    textView.layer.borderWidth = 1;
    [self.view addSubview:textView];
    _textView = textView;
    
    UIButton *button = [[UIButton alloc] initWithFrame:CGRectMake(0, CGRectGetHeight(rootFrame) - 200, CGRectGetWidth(rootFrame), 60)];
    [button setTitleColor:UIColor.blackColor forState:UIControlStateNormal];
    [button setTitle:@"hit me!!!" forState:UIControlStateNormal];
    [button addTarget:self action:@selector(tap) forControlEvents:UIControlEventTouchUpInside];
    [self.view addSubview:button];
}

- (void)tap {
    _textView.text = [NSString stringWithFormat:@"%@%@", _textView.text, @"more text!!!!"];
}

@end