IOS NSNotification 鍵盤遮擋問題的解決辦法

第IOSNSNotification鍵盤遮擋問題的解決辦法//Createdbygaowuhangon12-12-5.

//Copyright(c)2012年gaowuhang.Allrightsreserved.

#importViewController.h

@interfaceViewController()

@implementationViewController

@synthesizescrollView;

-(void)viewWillAppear:(BOOL)animated{

[superviewWillAppear:animated];

[[NSNotificationCenterdefaultCenter]addObserver:selfselector:@selector(keyboardDidShow:)name:UIKeyboardDidShowNotificationobject:nil];

[[NSNotificationCenterdefaultCenter]addObserver:selfselector:@selector(keyboardDidHide:)name:UIKeyboardDidHideNotificationobject:nil];

-(void)viewWillDisappear:(BOOL)animated{

[[NSNotificationCenterdefaultCenter]removeObserver:self];

-(void)keyboardDidShow:(NSNotification*)notif{

NSLog(@%@,@ReceivedUIKeyboardDidShowNotification

if(keyboardVisible){

NSLog(@%@,@Keyboardisalreadyvisible.Ignoringnotifications.

return;

//Thekeyboardwasntvisiblebefore

NSLog(@Resizingsmallerforkeyboard

//Gettheoriginofthekeyboardwhenitfinishesanimating

NSDictionary*info=[notifuserInfo];

NSValue*aValue=[infoobjectForKey:UIKeyboardFrameEndUserInfoKey];

//Getthetopofthekeyboardinviewscoordinatesystem.

//Weneedtosetthebottomofthescrollviewtolineupwithit

CGRectkeyboardRect=[aValueCGRectValue];

keyboardRect=[self.viewconvertRect:keyboardRectfromView:nil];

CGFloatkeyboardTop=keyboardRect.origin.y;

//Resizethescrollviewtomakeroomforthekeyboard

CGRectviewFrame=self.view.bounds;

viewFrame.size.height=keyboardTop-self.view.bounds.origin.y;

self.scrollView.frame=viewFrame;

keyboardVisible=YES;

-(void)keyboardDidHide:(NSNotification*)notif{

NSLog(@%@,@ReceivedUIKeyboardDidHideNotification

if(!keyboardVisible){

NSLog(@%@,@Keyboardalreadyhidden.Ignoringnotification.

return;

//Thekeyboardwasvisible

NSLog(@%@,@Resizingbiggerwithnokeyboard

//Resizethescrollviewbacktothefullsizeofourview

self.scrollView.frame=self.view.bounds;

keyboardVisible=NO;

-(void)viewDidLoad

scrollView=[[UIScrollViewalloc]initWithFrame:CGRectMake(0,0,320,460)];

//scroll.contentSize=CGSizeMake(1000,1000);

[self.viewaddSubview:scrollView];

//UIButton*button=[[UIButtonalloc]initWithFrame:CGRectMake(100,100,100,100)];

//[buttonsetBackgroundColor:[UIColorblackColor]];

//[scrolladdSubview:button];

UITextView*textView=[[UITextViewalloc]initWithFrame:CGRectMake(100,300,100,100)];

textView.text=@222

textView.font=[UIFontsystemFontOfSize:20];

[scrollViewaddSubview:textView];

[superviewDidLoad];

[textViewrelease];

self.scrollView.contentSize=self.view.frame.size;

//Doanyadditionalsetupafterloadingtheview,typicallyfromanib.

-(void)dealloc

[scrollViewrel