Recycle the keyboard by clicking on the space

One:

Effect Description: Click on the blank space to quickly recycle the keyboard

Two: Engineering drawings

Three: Code area

AppDelegate.h

#import <UIKit/UIKit.h>@interface appdelegate:uiresponder <UIApplicationDelegate>  *window; @end

Appdelegate.m

#import "AppDelegate.h"#import "RootViewController.h"@interfaceappdelegate ()@end@implementationappdelegate- (void) dealloc{Self.window=Nil; [Super Dealloc];}-(BOOL) Application: (UIApplication *) application didfinishlaunchingwithoptions: (Nsdictionary *) launchoptions {Self.window=[[[UIWindow alloc] initwithframe:[[uiscreen mainscreen] bounds]] autorelease]; //Override point for customization after application launch.Rootviewcontroller *rootview =[[Rootviewcontroller alloc] init]; Uinavigationcontroller*NAVIGATIONVC =[[Uinavigationcontroller Alloc]initwithrootviewcontroller:rootview]; Self.window.rootViewController=NAVIGATIONVC;        [Rootview release];        [NAVIGATIONVC release]; Self.window.backgroundColor=[Uicolor Whitecolor];    [Self.window makekeyandvisible]; returnYES;}@end

RootViewController.h

#import <UIKit/UIKit.h>@interface  rootviewcontroller:uiviewcontroller@end 

Rootviewcontroller.m

#import "RootViewController.h"@interfaceRootviewcontroller () @property (nonatomic, retain) Uitextfield*Text1, @property (nonatomic, retain) Uitextfield*Text2, @property (nonatomic, retain) Uitextfield*Text3;@end@implementationRootviewcontroller- (void) viewdidload {[Super viewdidload]; //Do any additional setup after loading the view.[self showtext];}

#pragma mark-Create a control  

- (void) Showtext {self.text1= [[Uitextfield alloc] Initwithframe:cgrectmake ( -, -,260, +)]; _text1.borderstyle=2; Self.text2= [[Uitextfield alloc] Initwithframe:cgrectmake ( -, the,260, +)]; _text2.borderstyle=2; Self.text3= [[Uitextfield alloc] Initwithframe:cgrectmake ( -, -,260, +)]; _text3.borderstyle=2;        [Self.view Addsubview:_text1];        [Self.view ADDSUBVIEW:_TEXT2];        [Self.view ADDSUBVIEW:_TEXT3];        [_text1 release];        [_text2 release]; [_text3 release];}

#pragma mark-The core code of the recovery keyboard

-(void) Touchesbegan: (Nsset *) touches withevent: (uievent *)event  {        [self.text1 Resignfirstresponder];        [Self.text2 Resignfirstresponder];        [Self.text3 Resignfirstresponder];    } -(void) didreceivememorywarning {    [super didreceivememorywarning];     // Dispose of any resources the can be recreated. }@end

Recycle the keyboard by clicking on the space