@interface HRDatePickerWindow : UIWindow
 
@property (nonatomic, strong) UIDatePicker *datePicker;

@property (nonatomic, strong) NSDate *maximumDate;//最大日期

@property (nonatomic, strong) NSDate *minimumDate;//最小日期

@property (nonatomic, strong) NSDate *nowDate;//初始化后默认显示当前日期

@property (nonatomic, assign) HRDatePickerMode datePickerMode;//日期模式, 具体如下

@property (nonatomic, strong) UIColor *datePickerBackGroundColor;//datePicker的背景颜色

@property (nonatomic, strong) UIColor *operationBackGroundColor;//datePicker上方view的背景颜色

@property (nonatomic, strong) UIColor *maskColor;//遮罩层的颜色
	
@property (nonatomic, assign)CGFloat datePickerHeight;//整个view的高度,如果初始化设置frame那么只有高度起作用

@property (nonatomic, copy) commit commitBlock;//选中某个日期的回调

@property (nonatomic, copy) cancel cancelBlock;//取消的回调

@property (nonatomic, assign)BOOL showTodayButton;//是否显示回到今日的按钮

-(void)show;//在指定界面展示日期选择器

	@interface DateSample ()
	//强引用
	@property(nonatomic, strong) HRDatePickerWindow *datePicker;
	@end
	@implementation DateSample
	
	- (void)viewDidLoad {
	    [super viewDidLoad];
	    // Do any additional setup after loading the view from its nib.
	}
	
	- (void)touchesBegan:(NSSet<UITouch *> *)touches withEvent:(UIEvent *)event{
		//显示日期选择器
		[self.datePicker show];
	}
	
	//懒加载
	- (HRDatePickerWindow *)datePicker{
	    if (!_datePicker) {
	        _datePicker = [[HRDatePickerWindow alloc] init];
	        _datePicker.datePickerMode = HRDatePickerModeDate;
	        _datePicker.operationBackGroundColor = kAppMainColor;
	        NSLocale *locale = [[NSLocale alloc] initWithLocaleIdentifier:@"zh_CN"];//设置为中文显示
	        _datePicker.datePicker.locale = locale;
	        _datePicker.showTodayButton = YES;
	        __weak typeof(self) weakSelf = self;
	        _datePicker.commitBlock = ^(NSDate *date) {
	           //选定日期的回调, 处理如改变UI, 发送请求等业务逻辑
	            
	        };
	    }
	    return _datePicker;
	}
	
	@end

//懒加载
private var datePick: HRDatePickerWindow = {
    let datePick = HRDatePickerWindow(frame: .zero)
    datePick.datePickerMode = HRDatePickerMode.date
   datePick.datePicker.locale = Locale(identifier: "zh_CN")
    datePick.showTodayButton = true
    return datePick
}()

//显示日期选择器
 func selectDate(_ sender: UIButton) {
    datePick.commitBlock = {[weak self] date in
        self?.inputValue.text = self?.formatter.string(from: date!)
    }
    datePick.show()
}