#import "ViewController.h"

@interface ViewController ()

@property (nonatomic,weak) UITextField *birthDataText;

@end

@implementation ViewController

- (void)viewDidLoad {
    [super viewDidLoad];
    
    UIView *accesoryView = [[UIView alloc] initWithFrame:CGRectMake(0, 0, 320, 40)];
    accesoryView.backgroundColor = [UIColor redColor];
    
    UIButton *btn = [UIButton buttonWithType:UIButtonTypeCustom];
    btn.frame = CGRectMake(60, 0, 200, 40);
    [btn setTitle:@"完成" forState:UIControlStateNormal];
    [btn addTarget:self action:@selector(btnClick) forControlEvents:UIControlEventTouchUpInside];
    [accesoryView addSubview:btn];
    
    UILabel *label = [[UILabel alloc] initWithFrame:CGRectMake(20, 20, 60, 40)];
    [label setText:@"生日: "];
    [label setTextAlignment:NSTextAlignmentRight];
    [self.view addSubview:label];
    
    UITextField *birthDayText = [[UITextField alloc] initWithFrame:CGRectMake(80, 20, 200, 40)];
    [birthDayText setPlaceholder:@"請輸入生日"];
    [birthDayText setBorderStyle:UITextBorderStyleRoundedRect];
    [self.view addSubview:birthDayText];
    
    self.birthDataText = birthDayText;
    
    UIDatePicker *dataPicker = [[UIDatePicker alloc] init];
//    [self.view addSubview:dataPicker];
    //選擇日期的模式
    [dataPicker setDatePickerMode:UIDatePickerModeDate];
    //NSLog(@"%@",[NSLocale availableLocaleIdentifiers]);
    
    //設定日期控制元件的初始值
    NSString *startDay = @"2012-12-04";
    NSDateFormatter *formater = [[NSDateFormatter alloc] init];
    formater.dateFormat = @"yyyy-MM-dd";
    NSDate *date = [formater dateFromString:startDay];
    
    //設定textFiled的預設值
    [self.birthDataText setText:startDay];
    
    [dataPicker setDate:date];
    
    //設定控制元件顯示的地區語言型別
    [dataPicker setLocale:[[NSLocale alloc] initWithLocaleIdentifier:@"zh_Hans_CN"]];
    
    //監聽日期選擇控制元件的數值變化
    [dataPicker addTarget:self action:@selector(dataChange:) forControlEvents:UIControlEventValueChanged];
    
    //設定輸入的UIView，而不是鍵盤
    [birthDayText setInputView:dataPicker];
    [birthDayText setInputAccessoryView:accesoryView];
}

#pragma mark - 完成按鍵處理
-(void)btnClick
{
    //退出鍵盤
    [self.view endEditing:YES];
}

#pragma mark - 日期選擇控制元件的監聽方法
-(void)dataChange:(UIDatePicker *)datePicker
{
    NSLog(@"%@",datePicker.date);
    NSDateFormatter *formater = [[NSDateFormatter alloc]init];
    formater.dateFormat = @"yyyy-MM-dd";
    self.birthDataText.text = [formater stringFromDate:datePicker.date];
}

#pragma mark - 點選空白處則退去鍵盤
-(void)touchesBegan:(NSSet *)touches withEvent:(UIEvent *)event
{
    [self.view endEditing:YES];

}

執行效果