https://pan.baidu.com/s/1nvtzwvB 自己修改了一下第三方UUDatePicker_Block，添加了屏幕适配,并解决了崩溃的bug

使用如下- (void)myTap{[myBackView removeFromSuperview];
}- (void)tap{[_textView resignFirstResponder];if (myBackView) {[myBackView removeFromSuperview];}myBackView = [[UIView alloc]initWithFrame:CGRectMake(0, 0, screenWidth, screenHeight-64)];myBackView.backgroundColor = [UIColor colorWithWhite:0 alpha:.2];[self.view addSubview:myBackView];UITapGestureRecognizer *myTap = [[UITapGestureRecognizer alloc]initWithTarget:self action:@selector(myTap)];[myBackView addGestureRecognizer:myTap];dateTimePickerView= [[UUDatePicker alloc]initWithframe:CGRectMake(0, screenHeight-64-200, screenWidth, 200)PickerStyle:UUDateStyle_YearMonthDayHourMinutedidSelected:^(NSString *year,NSString *month,NSString *day,NSString *hour,NSString *minute,NSString *weekDay) {selectTimeStr = [NSString stringWithFormat:@"%@-%@-%@ %@:%@",year,month,day,hour,minute];}];dateTimePickerView.minLimitDate = [[NSDate date]dateByAddingTimeInterval:0];//也可以自定义最小时间
//    // HH是24进制，hh是12进制
//    formatter.dateFormat = @"yyyy-MM-dd HH:mm:ss";
//    // 返回的格林治时间
//    NSDate *date2 = [formatter dateFromString:@"2017-2-23 12:14:56"];
//    dateTimePickerView.minLimitDate = date2;[myBackView addSubview:dateTimePickerView];UIView *whiteV = [[UIView alloc]initWithFrame:CGRectMake(0, dateTimePickerView.top-30, screenWidth, 30)];whiteV.backgroundColor = [UIColor whiteColor];[myBackView addSubview:whiteV];//UIButton *cancleBtn = [[UIButton alloc]initWithFrame:CGRectMake(10, 5, 60,30)];cancleBtn.titleLabel.font = [UIFont systemFontOfSize:14];[cancleBtn setTitleColor:[UIColor whiteColor] forState:UIControlStateNormal];[cancleBtn setBackgroundColor:dark_green];[cancleBtn setTitle:@"取消" forState:UIControlStateNormal];[cancleBtn addTarget:self action:@selector(selectedButtons:) forControlEvents:UIControlEventTouchUpInside];cancleBtn.tag = 100;[self setRadios:YES View:cancleBtn];[whiteV addSubview:cancleBtn];//UIButton *okBtn = [[UIButton alloc]initWithFrame:CGRectMake(screenWidth-70, 5, 60, 30)];[okBtn setTitleColor:[UIColor whiteColor] forState:UIControlStateNormal];okBtn.titleLabel.font = [UIFont systemFontOfSize:14];[okBtn setBackgroundColor:dark_green];[okBtn setTitle:@"确定" forState:UIControlStateNormal];[okBtn addTarget:self action:@selector(selectedButtons:) forControlEvents:UIControlEventTouchUpInside];okBtn.tag = 101;[self setRadios:YES View:okBtn];[whiteV addSubview:okBtn];}-(void)setRadios:(BOOL)bl View:(UIView *)vw{if (bl) {vw.layer.cornerRadius=4;vw.layer.masksToBounds = YES;}
}- (void)selectedButtons:(UIButton *)btn{if (btn.tag==100) {[myBackView removeFromSuperview];}if (btn.tag==101) {[myBackView removeFromSuperview];_timelbl.text = selectTimeStr;}
}