UIDatePick，UIPick

//创建UIpick遵循UIPickerViewDelegate,UIPickerViewDataSource这两个代理协议        _pickerView = [[UIPickerView alloc] initWithFrame:CGRectMake(0, 0 , ScreenWidth, ScreenHeigth*4/7)];        _pickerView.delegate = self;        _pickerView.dataSource = self;        _pickerView.backgroundColor = [[UIColor grayColor] colorWithAlphaComponent:0.5];        [self addSubview:_pickerView];//pragma mark-UIPickerView代理协议- (NSInteger)numberOfComponentsInPickerView:(UIPickerView *)pickerView{    return 1;}- (NSInteger)pickerView:(UIPickerView *)pickerView numberOfRowsInComponent:(NSInteger)component{    return _dataSource.count;}- (NSString*)pickerView:(UIPickerView *)pickerView titleForRow:(NSInteger)row forComponent:(NSInteger)component{    return _dataSource[row];}- (void)pickerView:(UIPickerView *)pickerView didSelectRow:(NSInteger)row inComponent:(NSInteger)component{    _choosePage = row;}

2.UIDatePick

UIDatePicker *datePicker = [ [ UIDatePicker alloc] initWithFrame:CGRectMake(0.0,0.0,0.0,0.0)]; //日期/时间选取器支持4种不同模式的选择方式。通过设置 datePickerMode 属性，可以定义选择模式/*UIDatePickerModeTime;UIDatePickerModeDate;UIDatePickerModeDateAndTime;UIDatePickerModeCountDownTimer;*/datePicker.datePickerMode = UIDatePickerModeTime; //你可以将分钟表盘设置为以不同的时间间隔来显示分钟，前提是该间隔要能够让60整除。默认间隔是一分钟。如果要使用不同的间隔，需要改变 minuteInterval属性：datePicker.minuteInterval = 5;//四、日期范围://你可以通过设置mininumDate 和 maxinumDate 属性，来指定使用的日期范围。如果用户试图滚动到超出这一范围的日期，表盘会回滚到最近的有效日期。两个方法都需要NSDate 对象作参数NSDate* minDate = [[NSDate alloc]initWithString:@"1900-01-01 00:00:00 -0500"];    NSDate* maxDate = [[NSDate alloc]initWithString:@"2099-01-01 00:00:00 -0500"];    datePicker.minimumDate = minDate;    datePicker.maximumDate = maxDate;//如果两个日期范围属性中任何一个未被设置，则默认行为将会允许用户选择过去或未来的任意日期。这在某些情况下很有用处，比如，当选择生日时，可以是过去的任意日期，但终止与当前日期。如果你希望设置默认显示的日期，可以使用date属性datePicker.date = minDate; //此外，你还可以用 setDate 方法。如果选择了使用动画，则表盘会滚动到你指定的日期：[datePicker setDate:maxDate animated:YES]; //五、读取日期NSDate* _date = datePicker.date; //由于日期选择器是 UIControl的子类 (与UIPickerView不同)，你还可以在UIControl类的通知结构中挂接一个委托[datePicker addTarget:self action:@selector(dateChanged:) forControlEvents:UIControlEventValueChanged ];-(void)dateChanged:(id)sender{              UIDatepicker* control = (UIDatePicker*)sender;    NSDate* _date = control.date;    /*添加你自己响应代码*/    }