【代码笔记】时间选择框

一， 效果图。

二，工程图。

三，代码。

RootViewController.h

#import <UIKit/UIKit.h>

@interface RootViewController : UIViewController { UIDatePicker *datePicker; UILabel *timeLabel; } @end

 

RootViewController.m

#import "RootViewController.h"

@interface RootViewController () @end

@implementation RootViewController - (id)initWithNibName:(NSString *)nibNameOrNil bundle:(NSBundle *)nibBundleOrNil { self = [super initWithNibName:nibNameOrNil bundle:nibBundleOrNil]; if (self) { // Custom initialization
 } return self; } - (void)viewDidLoad { [super viewDidLoad]; // Do any additional setup after loading the view.
 self.title=@"timerPicker"; timeLabel=[[UILabel alloc]init]; timeLabel.backgroundColor=[UIColor redColor]; timeLabel.frame=CGRectMake(10, 100, 300, 50); timeLabel.textAlignment=NSTextAlignmentCenter; [self.view addSubview:timeLabel]; } //点击任意处，弹出时间选择框
-(void)touchesBegan:(NSSet *)touches withEvent:(UIEvent *)event { datePicker = [[UIDatePicker alloc]initWithFrame:CGRectMake(0, self.view.frame.size.height-216, 0, 0)]; datePicker.datePickerMode = UIDatePickerModeDateAndTime; [datePicker addTarget:self action:@selector(dateChanged:) forControlEvents:UIControlEventValueChanged ]; [self.view addSubview:datePicker]; } //开始结束时间选择框
- (void)dateChanged:(id)sender { NSDate *date = datePicker.date; NSDateFormatter *dateFormatter = [[NSDateFormatter alloc] init]; [dateFormatter setDateFormat:@"yyyy-MM-dd hh:mm"]; //设备默认的值
    dateFormatter.locale=[NSLocale systemLocale]; //将所选择的时候转化为需要的时间格式
    NSString *dateStr = [NSString stringWithFormat:@"%@",[dateFormatter stringFromDate:date]]; timeLabel.text=dateStr; //让选择完时间后，选择框，消失，这个时间可以自己调整
    [UIView animateWithDuration:.5f delay:.5f options:UIViewAnimationOptionCurveEaseInOut animations:^{ [datePicker setFrame:CGRectMake(0, self.view.frame.size.height, 0, 0)]; } completion:nil]; } - (void)didReceiveMemoryWarning { [super didReceiveMemoryWarning]; // Dispose of any resources that can be recreated.
}