Use of the UIDatePicker Control for iOS Learning

On iOS, the time and date Selection control is like this. On the left side is the combination of time and date, and on the right side is the pure date mode.

,

You can select four modes as needed: Time, Date, Date and Time, and Count Down Timer.

 

 

This article briefly introduces the use of the PickerDate Control

 

 

1. Create a Singe View Application named DatePickDemo. Other settings

 

2. place controls

Open ViewController. xib, drag a DatePicker control to the interface, drag a Button control to the interface, double-click the Button, and enter "select Date and Time"

3. Establish an association between xib and ViewController

Press command + alt + enter to open the Assistant Editor, select DatePicker, press and hold the Control key, and drag it to viewController. h,

Create an Outlet datePicker.

Create an Action Association ing for the Button in the same way and name it selectDate. The event type is the default Touch Up Inside.

4. Implementation Code

 

Click ViewController. m and find

 

-(IBAction) selectDate :( id) sender {

}

Add response code here

 

-(IBAction) selectDate :( id) sender {NSDate * select = [datePicker date]; NSDateFormatter * dateFormatter = [[NSDateFormatter alloc] init]; [dateFormatter setDateFormat: @ "yyyy-MM-dd HH: mm"]; NSString * dateAndTime = [dateFormatter stringFromDate: select]; UIAlertView * alert = [[UIAlertView alloc] initWithTitle: @ "time prompt" message: dateAndTime delegate: self cancelButtonTitle: @ "OK" otherButtonTitles: nil, nil]; [alert show];}

Running results:

 

 

5. modify the code in Date mode.

 

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

 

Example code: https://github.com/schelling/YcDemo

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