UIDatePicker - 键盘处理-选择日期

#import "ViewController.h"

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

@property (nonatomic, weak) UIDatePicker *datePicker;

@end

@implementation ViewController

#pragma mark - UITextFieldDelegate

// 是否允许用户输入文字
- (BOOL)textField:(UITextField *)textField shouldChangeCharactersInRange:(NSRange)range replacementString:(NSString *)string{
return NO;
}

// 文本框开始编辑的时候调用
- (void)textFieldDidBeginEditing:(UITextField *)textField
{
// 给生日文本框赋值
[self dateChange:_datePicker];
}
- (void)viewDidLoad {
[super viewDidLoad];
// Do any additional setup after loading the view, typically from a nib.
_birthdayField.delegate = self;

// 自定义生日键盘
[self setUpBirthdayKeyboard];
}

// 自定义生日键盘
- (void)setUpBirthdayKeyboard
{
// 创建UIDatePicker
// 注意：UIDatePicker有默认的尺寸，可以不用设置frame
UIDatePicker *picker = [[UIDatePicker alloc] init];

_datePicker = picker;

// 设置地区 zh:中国
picker.locale = [NSLocale localeWithLocaleIdentifier:@"zh"];

// 设置日期的模式
picker.datePickerMode = UIDatePickerModeDate;

// 监听UIDatePicker的滚动
[picker addTarget:self action:@selector(dateChange:) forControlEvents:UIControlEventValueChanged];

_birthdayField.inputView = picker;
}

// 当UIDatePicker滚动的时候调用
// 给生日文本框赋值
- (void)dateChange:(UIDatePicker *)datePicker
{
NSLog(@"%@",datePicker.date);
// 日期转换字符串

NSDateFormatter *fmt = [[NSDateFormatter alloc] init];

fmt.dateFormat = @"yyyy-MM-dd";

NSString *dateStr = [fmt stringFromDate:datePicker.date];

_birthdayField.text = dateStr;
}

- (void)didReceiveMemoryWarning {
[super didReceiveMemoryWarning];
// Dispose of any resources that can be recreated.
}

@end