UIDataPicker 时间选择器

 @interface ViewController ()

 {

     UILabel *cityLabel;

     UIDatePicker *datePicker;

 }

 //@property(nonatomic,strong)ZHPickView *pickview;

 @end

 @implementation ViewController

 - (void)viewDidLoad {

     [super viewDidLoad];

     // Do any additional setup after loading the view, typically from a nib.

     cityLabel=[[UILabel alloc]init];

     cityLabel.frame=CGRectMake(, , ,  );

     cityLabel.text=@"abcdefg";

     [self.view addSubview:cityLabel];

     UIButton *btn=[[UIButton alloc]init];

     btn.frame=CGRectMake(, , , );

     btn.backgroundColor=[UIColor yellowColor];

     [btn addTarget:self action:@selector(add) forControlEvents:UIControlEventTouchUpInside];

     [self.view addSubview:btn];

     //datePicker宽度320像素和高度216像素，系统都设置好了，只需设置一下他的远点坐标，

     datePicker = [[UIDatePicker alloc] initWithFrame:CGRectMake(, ,[UIScreen mainScreen].bounds.size.width, )];

     NSLocale *locale = [[NSLocale alloc]initWithLocaleIdentifier:@"zh_CN"];

     datePicker.locale = locale;

     //设置datePicker显示模式

     [datePicker setDatePickerMode:UIDatePickerModeDate];

     //DatePicker属于UIControl子类，可以触发事件，当滚动滑轮滑轮停下后就调用这个方法了

     [datePicker addTarget:self action:@selector(dateChanged:) forControlEvents:UIControlEventValueChanged];

     datePicker.hidden=YES;

     [self.view addSubview:datePicker];

 }

 -(void)add{

     datePicker.hidden=NO;

 }

 -(void)dateChanged:(id)sender

 {

     UIDatePicker *control = (UIDatePicker*)sender;

     //把当前控件设置的时间赋给date

     NSDate *date = control.date;

     // 将NSDate格式装换成NSString类型

     NSDateFormatter *dateFormatter = [[NSDateFormatter alloc]init];

     //设置日历显示格式

     [dateFormatter setDateFormat:@"yyyy/MM/dd"];

     //把日历时间传给字符串

     NSString *strDate = [dateFormatter stringFromDate:date];

     NSString *message = [[NSString alloc]initWithFormat:@"%@",strDate];

     cityLabel.text=message;

 }