为什么不是带属性字符串!?!，这是IOS 6.0的祝福功能之一:)

NSMutableParagraphStyle *mps = [[NSMutableParagraphStyle alloc] init];
            mps.firstLineHeadIndent = 5.0f;
UIColor *placeColor = self.item.bgColor;

textFieldInstance.attributedPlaceholder = [[NSAttributedString alloc] initWithString:@"My Place Holder" attributes:@{NSForegroundColorAttributeName: placeColor, NSFontAttributeName : [UIFont systemFontOfSize:7.0f], NSParagraphStyleAttributeName : mps}];

只是UITextField的子类，像这样:

@implementation DFTextField


- (CGRect)textRectForBounds:(CGRect)bounds
{
    return CGRectInset(bounds, 10.0f, 0);
}

- (CGRect)editingRectForBounds:(CGRect)bounds
{
    return [self textRectForBounds:bounds];
}


@end

这增加了10点的水平填充两边。

下面是一个Swift代码，在UITextfield中提供填充

 func txtPaddingVw(txt:UITextField) {
     let paddingView = UIView(frame: CGRectMake(0, 0, 10, 10))
     txt.leftViewMode = .Always
     txt.leftView = paddingView
 }

调用using

self.txtPaddingVw(txtPin)

就像这样子类UITextField (Swift版本):

import UIKit

class CustomTextField: UITextField {

    override func textRectForBounds(bounds: CGRect) -> CGRect {
       return CGRectInset(bounds, 25.0, 0)
    }

    override func editingRectForBounds(bounds: CGRect) -> CGRect {
       return self.textRectForBounds(bounds)
    }

}

这增加了25.0点的水平填充两边。

最好的方法是使用UITextField的子类并在.m文件中创建一个类

 #import "CustomTextField.h"
 #import <QuartzCore/QuartzCore.h>
 @implementation CustomTextField


- (id)initWithCoder:(NSCoder*)coder 
 {
  self = [super initWithCoder:coder];

  if (self) {

//self.clipsToBounds = YES;
//[self setRightViewMode:UITextFieldViewModeUnlessEditing];

self.leftView = [[UIView alloc] initWithFrame:CGRectMake(0, 0,15,46)];
self.leftViewMode=UITextFieldViewModeAlways;
   }

  return self;

 }

通过这样做，去到你的故事板或xib，点击身份检查器，用你自己的“CustomTextField”在类选项替换UITextfield。

注意:如果你只是给文本框自动布局填充，那么你的应用程序将不会运行，只显示空白屏幕。

Swift 2.0版本:

let paddingView: UIView = UIView(frame: CGRectMake(0, 0, 5, 20))
textField.leftView = paddingView
textField.leftViewMode = UITextFieldViewMode.Always;