弹出生日键盘

//
//  ViewController.m
//  4.20 自定义生日键盘
//
//  Created by hissia on 16/4/20.
//  Copyright © 2016年 suiyue. All rights reserved.
//

#import "ViewController.h"

@interface ViewController () <UITextFieldDelegate>
@property (weak, nonatomic) IBOutlet UITextField *birthdayLabel;

@property (strong, nonatomic)UIDatePicker *datePicker;

@end

@implementation ViewController
//是否允许输入文字
- (BOOL)textField:(UITextField *)textField shouldChangeCharactersInRange:(NSRange)range replacementString:(NSString *)string{
    return NO;
}

- (void)viewDidLoad {
    [super viewDidLoad];
    _birthdayLabel.delegate = self;
    
//    设置自定义键盘
    [self setupBirthdayKeyboard];
30
}

//自定义键盘格式
- (void)setupBirthdayKeyboard
{
//    创建UIDatePicker，有默认的frame，所以不用设置尺寸
    UIDatePicker *picker = [[UIDatePicker alloc] init];
    
//   赋值 _datePicker
    _datePicker = picker;
    
//    设置本地化（本地语言）
    picker.locale = [NSLocale localeWithLocaleIdentifier:@"zh"];
    
//    设置时间显示格式，还有其他好多种
    picker.datePickerMode = UIDatePickerModeDate;
   
    //监听UIDatePicker的滚动
    [picker addTarget:self action:@selector(dateChange:) forControlEvents:UIControlEventValueChanged];
     self.birthdayLabel.inputView = picker;
}

- (void)dateChange:(UIDatePicker *)datePicker
{
//    这样就可以获得生日键盘的  datePicker.date
//    NSLog(@"%@",datePicker.date);
//    NSLog(@"%s",__func__);  此打印方法的的各种属性
   
    //把获得的日期转化成字符串，赋值到birthdayLabel中
    NSDateFormatter *fmt = [[NSDateFormatter alloc] init];
    fmt.dateFormat = @"yyyy-MM-dd";
    NSString *datestr = [fmt stringFromDate:datePicker.date];
    _birthdayLabel.text = datestr;
    
}

//文本框开始编辑时候监听事件
- (void)textFieldDidBeginEditing:(UITextField *)textField
{
    //获取当前dataPicker的日期
     [self dateChange:_datePicker];
}
//点击空白处弹回生日键盘
- (void)touchesBegan:(NSSet<UITouch *> *)touches withEvent:(UIEvent *)event
{
    [self.view endEditing:YES];
}
@end