UI Popup Keyboard and retract keyboard

Clicking TextField will automatically eject the keyboard

To get the keyboard back up, first set up a proxy: [Field settextfielddelegate:self]; Can be set to their own, can also be set to other objects, as long as in the corresponding class, follow the Uitextfielddelegate protocol

In the Uitextfielddelegate protocol, there are some optional methods:

Click Return to recycle the keyboard

-(BOOL) Textfieldshouldreturn: (Uitextfield *) textfield{[TextField Resignfirstresponder]; Give up the first response, the first response is pop-up keyboard, give up the first response to take back the return YES; Click on the blank recycling keyboard first need to know is click on which TextField let the keyboard pop out, know, let that TextField give up the first response-(void) textfielddidbeginediting: (Uitextfield *) textfield{Self.textfield = TextField;//Use a property to record which TextField eject the keyboard}-(void) toucherended: (Nsset *) touches withevent: ( Uievent *) event{[Self.textfield resignfirstresponder];//The TextField that records the property discards the first response.}

UI Popup Keyboard and retract keyboard