Add lefthand margin to UITextField

I want to put the lef开发者_运维问答t margin of a UITextField's text at 10 px. What is the best way to do that?

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You can do it by extending UITextField class and overriding two methods:

- (CGRect)textRectForBounds:(CGRect)bounds;
- (CGRect)editingRectForBounds:(CGRect)bounds;

Here is the code:

The interface in MYTextField.h

@interface MYTextField : UITextField

@end

Its implementation in MYTextField.m

@implementation MYTextField

static CGFloat leftMargin = 28;

 - (CGRect)textRectForBounds:(CGRect)bounds
{
    bounds.origin.x += leftMargin;

    return bounds;
}

 - (CGRect)editingRectForBounds:(CGRect)bounds
{
    bounds.origin.x += leftMargin;

    return bounds;
}
@end

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As I have explained in a previous comment, the best solution in this case is to extend the UITextField class instead of using a category, so you can use it explicitly on the desired text fields.

#import <UIKit/UIKit.h>

@interface MYTextField : UITextField

@end


@implementation MYTextField

- (CGRect)textRectForBounds:(CGRect)bounds {
    int margin = 10;
    CGRect inset = CGRectMake(bounds.origin.x + margin, bounds.origin.y, bounds.size.width - margin, bounds.size.height);
    return inset;
}

- (CGRect)editingRectForBounds:(CGRect)bounds {
    int margin = 10;
    CGRect inset = CGRectMake(bounds.origin.x + margin, bounds.origin.y, bounds.size.width - margin, bounds.size.height);
    return inset;
}

@end

A category is intended to add new functions to an existing class, not to override an existing method.

---

UITextField * textField = [[UITextField alloc]init];
[textField setDelegate:self];
[textField setFrame:CGRectMake(170,112,140,25)];
[textField setBorderStyle:UITextBorderStyleNone];
[textField setBackgroundColor:[UIColor clearColor]];
[self.View addSubview:noofChildTField];

UIView *paddingView = [[[UIView alloc] initWithFrame:CGRectMake(0, 0, 5, 20)] autorelease];
textField.leftView = paddingView;
textField.leftViewMode = UITextFieldViewModeAlways;

Try this code

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For Swift 3 :

Make an outlet of the UITextField, say usernameTextField. Then write the following code in viewDidLoad()

let paddingView : UIView = UIView(frame: CGRect(x: 0, y: 0, width: 5, height: 20))
usernameTextField.leftView = paddingView
usernameTextField.leftViewMode = .always

Change the width: 5 to a greater value if more space is required.

---

I was hoping to see a setting in IB in the property inspector to adjust this value. Turns out I had set alignment and border style inadvertently to values that messed with the padding on the left.

You wouldn't think it would be a big deal to choose left justify and no border but it makes the words basically overlap or come right to the edge of the box and it doesn't look right.

Bad:

Good:

Fixed it right up for me. Hope this helps someone else as well.

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Subclass the UITextField and add an extension:

extension UITextField {
    func paddingLeft(inset: CGFloat){
        self.leftView = UIView(frame: CGRect(x: 0, y: 0, width: inset, height: self.frame.height))
        self.leftViewMode = UITextField.ViewMode.always
    }
}

usage

class MyUITextFieldClass: UITextField {
    override func awakeFromNib() {
        super.awakeFromNib()
        // Initialization code
        self.paddingLeft(inset: 10)
    }
}

---

i have reached almost by overriding - (CGRect)textRectForBounds:(CGRect)bounds. now issue is when TextField goes in to edit mode their left margin reset to Zero .......

@implementation UITextField(UITextFieldCatagory)

- (CGRect)textRectForBounds:(CGRect)bounds {
    CGRect theRect=CGRectMake(bounds.origin.x+10, bounds.origin.y, bounds.size.width-10, bounds.size.height);
    return theRect;


}

---

For Swift 4:

I prefer to use IBDesignable class and IBInspectable properties to allow me to set the padding via Xcode storyboards and keep it reusable. I've also updated the code to work in Swift 4.

import Foundation
import UIKit

@IBDesignable
class PaddableTextField: UITextField {

    var padding = UIEdgeInsets(top: 0.0, left: 0.0, bottom: 0.0, right: 0.0)

    @IBInspectable var left: CGFloat = 0 {
        didSet {
            adjustPadding()
        }
    }

    @IBInspectable var right: CGFloat = 0 {
        didSet {
            adjustPadding()
        }
    }

    @IBInspectable var top: CGFloat = 0 {
        didSet {
            adjustPadding()
        }
    }

    @IBInspectable var bottom: CGFloat = 0 {
        didSet {
            adjustPadding()
        }
    }

    func adjustPadding() {
         padding = UIEdgeInsets(top: top, left: left, bottom: bottom, right: right)

    }

    override func prepareForInterfaceBuilder() {
        super.prepareForInterfaceBuilder()
    }

    override func textRect(forBounds bounds: CGRect) -> CGRect {
        return bounds.inset(by: UIEdgeInsets(top: top, left: left, bottom: bottom, right: right))
    }

    override func placeholderRect(forBounds bounds: CGRect) -> CGRect {
        return bounds.inset(by: UIEdgeInsets(top: top, left: left, bottom: bottom, right: right))
    }

    override func editingRect(forBounds bounds: CGRect) -> CGRect {
         return bounds.inset(by: UIEdgeInsets(top: top, left: left, bottom: bottom, right: right))
    }
}

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You can try this

TextField.contentVerticalAlignment = UIControlContentVerticalAlignmentCenter;
TextField.textAlignment = UITextAlignmentCenter;