自定义TextField清除按钮

当需要设置TextField的清除按钮的时候,系统的总是不满足需求,这就需要我们自定义了,代码如下:

 //
 //  TextFieldDemoViewController.m
 //  OCDemo
 //
 //  Created by 思 彭 on 16/12/14.
 //  Copyright © 2016年 思 彭. All rights reserved.
 //

 #import "TextFieldDemoViewController.h"

 @interface TextFieldDemoViewController ()<UITextFieldDelegate>

 @property (nonatomic, strong) UITextField *textField;

 @end

 @implementation TextFieldDemoViewController

 - (void)viewDidLoad {
     [super viewDidLoad];

     self.textField = [[UITextField alloc]initWithFrame:CGRectMake(, , , )];
     self.textField.delegate = self;
     self.textField.placeholder = @"请输入";
     self.textField.borderStyle = UITextBorderStyleLine;
     [self.view addSubview:self.textField];

     /*
     self.textField.clearButtonMode = UITextFieldViewModeAlways;
     // 设置textField清除按钮的背景颜色
     [self.textField setValue:[UIColor redColor] forKeyPath:@"_placeholderLabel.textColor"];
     // 不能改变背景颜色,需要设置imageView属性
     [self.textField setValue:[UIColor redColor] forKeyPath:@"_clearButton.backgroundColor"];
 //    [self.textField setValue:[UIImage imageNamed:@"iconfont-shuqian_sel_30x30_@2x"] forKeyPath:@"_clearButton.image"];

      */

     UIButton *clearButton = [UIButton buttonWithType:UIButtonTypeCustom];
     clearButton.frame = CGRectMake(self.textField.frame.size.width - , , , );
     [clearButton addTarget:self action:@selector(clearButtonDidClick:) forControlEvents:UIControlEventTouchUpInside];
     [clearButton setImage:[UIImage imageNamed:@"iconfont-shuqian_sel_30x30_@2x"] forState:UIControlStateNormal];
     [self.textField addSubview:clearButton];
 }

 - (void)clearButtonDidClick: (UIButton *)button {

     self.textField.text = nil;
 }

 - (BOOL)textFieldShouldReturn:(UITextField *)textField {

     [self.textField resignFirstResponder];
     return YES;
 }
 @end