UIDatePicker封装

#import <UIKit/UIKit.h>
#import <objc/runtime.h>

@protocol datePickerViewDelegate <NSObject>

-(void)datePickerViewChoseTime:(NSString *)timeStr;

@end

@interface DatePickerView : UIView
@property(nonatomic,strong)UIDatePicker *datePicker;
@property(nonatomic,strong)UILabel *datePickerTimeLab;
@property(nonatomic,strong)NSDate *selectDate;
@property(nonatomic,assign)id<datePickerViewDelegate>delegate;
@property(nonatomic,copy)void(^hideBlock)();// 隐藏时调用的block

-(void)showDatePickerView;
-(void)dismissDatePickerView;
@end

#import "DatePickerView.h"
@interface DatePickerView ()
{
    UIView *backView;
}
@end

@implementation DatePickerView

-(instancetype)initWithFrame:(CGRect)frame{
    self = [super initWithFrame:CGRectMake(0, 0, MAINSCROON_WIDTH, MAINSCROON_HEIGHT)];
    if(self){
        backView = [UIView new];
        [self addSubview:backView];
        backView.backgroundColor = [UIColor blackColor];
        backView.alpha = 0.25;
        [backView mas_makeConstraints:^(MASConstraintMaker *make) {
            make.size.equalTo(self);
            make.top.offset(0);
            make.left.offset(0);
        }];
        self.datePicker = [UIDatePicker new];
        NSLocale *locale = [[NSLocale alloc] initWithLocaleIdentifier:@"zh_CN"];//设置为中
        self.datePicker.locale = locale;
        self.datePicker.backgroundColor = [UIColor whiteColor];
        [self.datePicker setDatePickerMode:UIDatePickerModeDate];
        [self.datePicker addTarget:self action:@selector(dataValueChanged:) forControlEvents:UIControlEventValueChanged];
        [self addSubview:self.datePicker];
        [self.datePicker mas_makeConstraints:^(MASConstraintMaker *make) {
            make.centerX.equalTo(self.mas_centerX);
            make.bottom.offset(-(BOTTOM_HEIGHT));
            if([UIScreen mainScreen].bounds.size.width >= 720){
                make.height.offset(320);
            }else{
                make.height.offset(180);
            }
            make.width.equalTo(self.mas_width);
        }];

        UIView *topView = [UIView new];
        topView.backgroundColor = [UIColor whiteColor];
        [self addSubview:topView];
        [CreateUI addFrameWithBottomView:topView borderHeight:1.0f withBorderColor:BORDER_COLOR];
        [topView mas_makeConstraints:^(MASConstraintMaker *make) {
            make.bottom.equalTo(self.datePicker.mas_top).offset(0);
            make.width.equalTo(self.datePicker.mas_width);
            make.height.offset(34);
            make.left.offset(0);
        }];
        UILabel *choseLab = [UILabel new];
        choseLab.text = @"选择时间:";
        choseLab.font = [UIFont systemFontOfSize:14];
        [topView addSubview:choseLab];
        [choseLab mas_makeConstraints:^(MASConstraintMaker *make) {
            make.centerY.equalTo(topView.mas_centerY);
            make.left.offset(5);
        }];

        self.datePickerTimeLab = [UILabel new];
        self.datePickerTimeLab.font = [UIFont systemFontOfSize:14];
        [self dataValueChanged:self.datePicker];
        [topView addSubview:self.datePickerTimeLab];
        [self.datePickerTimeLab mas_makeConstraints:^(MASConstraintMaker *make) {
            make.centerY.equalTo(topView.mas_centerY);
            make.left.equalTo(choseLab.mas_right).offset(5);
        }];

        UIButton *sureBtn = [UIButton new];
        sureBtn.clipsToBounds = YES;
        sureBtn.layer.cornerRadius = 17;
        [sureBtn setTitle:@"确定" forState:UIControlStateNormal];
        [self addSubview:sureBtn];
        sureBtn.backgroundColor = [ImageService colorWithHexString:@"#12b7f5"];

        [sureBtn mas_makeConstraints:^(MASConstraintMaker *make) {
            make.bottom.equalTo(self.datePicker.mas_bottom).offset(-10);
            make.centerX.equalTo(self.datePicker.mas_centerX);
            make.height.offset(34);
            make.width.equalTo(self.datePicker.mas_width).multipliedBy(0.7);
        }];
        [sureBtn addTarget:self action:@selector(sureTimeBtnClick) forControlEvents:UIControlEventTouchUpInside];
    }
    return self;
}
-(void)sureTimeBtnClick{

    [_delegate datePickerViewChoseTime:self.datePickerTimeLab.text];

    [self dismissDatePickerView];
}
- (void) dataValueChanged:(UIDatePicker *)sender
{
    UIDatePicker *dataPicker_one = (UIDatePicker *)sender;
    NSDate *date_one = dataPicker_one.date;
    NSDateFormatter *formatter = [[NSDateFormatter alloc] init];
    [formatter setDateFormat:@"yyyy-MM-dd"];
    self.datePickerTimeLab.text = [formatter stringFromDate:date_one];
}
-(void)setSelectDate:(NSDate *)selectDate{
    _selectDate = selectDate;
    self.datePicker.date = selectDate;
    NSDateFormatter *formatter = [[NSDateFormatter alloc] init];
    [formatter setDateFormat:@"yyyy-MM-dd"];
    self.datePickerTimeLab.text = [formatter stringFromDate:selectDate];
}

-(void)touchesBegan:(NSSet<UITouch *> *)touches withEvent:(UIEvent *)event{
    [self dismissDatePickerView];
}

-(void)showDatePickerView{
    UIWindow *window = [[[UIApplication sharedApplication]delegate]window];
    [window endEditing:YES];
    [window addSubview:self];
    self.alpha = 0;
    [UIView animateWithDuration:0.3 animations:^{
        self.alpha = 1;
    }];
}
-(void)dismissDatePickerView{
    if(self.hideBlock){
        self.hideBlock();
    }
    UIWindow *window = [[[UIApplication sharedApplication]delegate]window];
    [window addSubview:self];
    self.alpha = 1;
    [UIView animateWithDuration:0.3 animations:^{
        self.alpha = 0;
    } completion:^(BOOL finished) {
        [self removeFromSuperview];
    }];

}

@end

使用：

//懒加载
-(DatePickerView *)datePickerView{
    if(!_datePickerView){
        _datePickerView = [DatePickerView new];
        _datePickerView.delegate =self;
        _datePickerView.datePicker.minimumDate = [NSDate date];
    }
    return _datePickerView;
}
//显示 如果设置默认日期可以这个 [self.datePickerView.datePicker setDate:[NSDate date]];
 [self.datePickerView showDatePickerView];