How to style UITextview to like Rounded Rect text field?

I am using a text view as a comment composer.

In the properties inspector I can't find anything like a border style property so that I can make use a rounded rect, something like UITextField.

So, the question is: How can I style a UITextView like a UITextField with a rounded rect?

There is no implicit style that you have to choose, it involves writing a bit of code using the QuartzCore framework:

//first, you
#import <QuartzCore/QuartzCore.h>

//.....

//Here I add a UITextView in code, it will work if it's added in IB too
UITextView *textView = [[UITextView alloc] initWithFrame:CGRectMake(50, 220, 200, 100)];

//To make the border look very close to a UITextField
[textView.layer setBorderColor:[[[UIColor grayColor] colorWithAlphaComponent:0.5] CGColor]];
[textView.layer setBorderWidth:2.0];

//The rounded corner part, where you specify your view's corner radius:
textView.layer.cornerRadius = 5;
textView.clipsToBounds = YES;

It only works on OS 3.0 and above, but I guess now it's the de facto platform anyway.

this code worked well for me:

    [yourTextView.layer setBackgroundColor: [[UIColor whiteColor] CGColor]];
    [yourTextView.layer setBorderColor: [[UIColor grayColor] CGColor]];
    [yourTextView.layer setBorderWidth: 1.0];
    [yourTextView.layer setCornerRadius:8.0f];
    [yourTextView.layer setMasksToBounds:YES];

Swift 3 Version

After setting up the text view in interface builder.

@IBOutlet weak var textView: UITextView!

override func viewDidLoad() {
    super.viewDidLoad()
    textView.layer.cornerRadius = 5     
    textView.layer.borderColor = UIColor.gray.withAlphaComponent(0.5).cgColor
    textView.layer.borderWidth = 0.5  
    textView.clipsToBounds = true
}

Swift 2.2 Version

@IBOutlet weak var textView: UITextView!

override func viewDidLoad() {
    super.viewDidLoad()
    textView.layer.cornerRadius = 5     
    textView.layer.borderColor = UIColor.grayColor().colorWithAlphaComponent(0.5).CGColor
    textView.layer.borderWidth = 0.5  
    textView.clipsToBounds = true
}