IOS retract keyboard--in Lan Yi education

I. Using OC
1. First, to add a proxy uitextfielddelegate
2. Set proxy textfield.delegate = self;
3. Implementing the methods in the Protocol

Click Return to retract the keyboard
-(BOOL) Textfieldshouldreturn: (Uitextfield *) TextField

{

Recycle keyboard, cancel first responder

[TextField Resignfirstresponder];

return YES;

}

Click on the empty space to retract the keyboard
-(void) touchesended: (Nsset *) touches withevent: (Uievent *) Event {

[TextField Resignfirstresponder];

}

Two. Using Swift
Steps 1, 2 and OC are not different, the specific implementation method slightly different
1. Click Return to recycle the keyboard
Func Textfieldshouldreturn (textfield:uitextfield!), bool{
Textfield.resignfirstresponder ()
return True
}
2. Click the blank recycle keyboard
var Firsttextfield:uitextfield?
var Secondtextfield:uitextfield?
var Thirdtextfield:uitextfield?

Override Func touchesended (Touches:set, withevent event:uievent) {
Thirdtextfield?. Resignfirstresponder ()
Firsttextfield?. Resignfirstresponder ()
Secondtextfield?. Resignfirstresponder ()
}

IOS retract keyboard--in Lan Yi education