1.拖一個Scroll View視圖填充View窗口，將Scroll View視圖拖大一些，使其超出屏幕。

2.向Scroll View拖（添加）多個Label視圖和Text View視圖。

3.在.h頭文件中添加如下代碼：

#import <UIKit/UIKit.h>
@interface ShowTextFiled : UIViewController {
IBOutlet UIScrollView *myscrollview;
UITextField * currentTextfield;//當前的文本筐
BOOL keyboardIsShown;
}
@property (nonatomic,retain)UIScrollView *myscrollview;
@end

4.在Interface Builer中，將每個Text Field的delegate連接到File‘s Owner。這一步很重要，因為它使得文本筐的各種事件如：textFieldDidBeginEditing。textFieldDidEndEditing等可被試圖控制器處理。

5.在viewDidLoad方法里面修改ScrollView的內容大小：

- (void)viewDidLoad
{
//下面這兩句話必須寫，否則scrollview不可以動
myscrollview.frame = CGRectMake(0, 0, 320, 460);
[myscrollview setContentSize:CGSizeMake(320,651 )];
[super viewDidLoad];
// Do any additional setup after loading the view from its nib.
}

6.在View窗口顯示以前注冊兩個通知，這兩個通知可以告訴你鍵盤何時顯示或消失，在viewWillAppear方法里面注冊：

//頁面加載前調用的方法,注冊兩個通知：一個是鍵盤彈出來的通知，另外一個是鍵盤隱藏的通知，不同的通知調用不同的方法進行處理
-(void) viewWillAppear:(BOOL)animated{
//鍵盤彈起的通知
[[NSNotificationCenter defaultCenter] 
addObserver:self
selector:@selector(keyboardDidShow:) 
name:UIKeyboardDidShowNotification
object:self.view.window];
//鍵盤隱藏的通知
[[NSNotificationCenter defaultCenter]
addObserver:self
selector:@selector(keyboardDidHide:) 
name:UIKeyboardDidHideNotification 
object:nil];
}

7.上面的通知中，當鍵盤彈起的時候會調用 keyboardDidShow方法，當鍵盤消失會調用keyboardDidHide方法，這兩個方法定義如下：

//鍵盤彈起后處理scrollView的高度使得textfield可見
-(void)keyboardDidShow:(NSNotification *)notification{
if (keyboardIsShown) {
return;
}
NSDictionary * info = [notification userInfo];
NSValue *avalue = [info objectForKey:UIKeyboardFrameEndUserInfoKey];
CGRect keyboardRect = [self.view convertRect:[avalue CGRectValue] fromView:nil];
CGRect viewFrame = [myscrollview frame];
viewFrame.size.height -= keyboardRect.size.height;
myscrollview.frame = viewFrame;
CGRect textFieldRect = [currentTextfield frame];
[myscrollview scrollRectToVisible:textFieldRect animated:YES];
keyboardIsShown = YES;
}

//鍵盤隱藏后處理scrollview的高度，使其還原為本來的高度
-(void)keyboardDidHide:(NSNotification *)notification{
NSDictionary *info = [notification userInfo];
NSValue *avalue = [info objectForKey:UIKeyboardFrameEndUserInfoKey];
CGRect keyboardRect = [self.view convertRect:[avalue CGRectValue] fromView:nil];
CGRect viewFrame = [myscrollview frame];
viewFrame.size.height += keyboardRect.size.height;
myscrollview.frame = viewFrame;
keyboardIsShown = NO;
}

8.重寫TextField的三個事件方法：

當點擊TextField視圖時會促發如下方法：這個方法會將當前點擊的文本筐賦值給currentTextField成員變量

-(void)textFieldDidBeginEditing:(UITextField *)textFieldView{
currentTextfield = textFieldView;
}

當用戶點擊鍵盤中的Return鍵時，會促發如下方法：

-(BOOL)textFieldShouldReturn:(UITextField *)textFieldView{
[textFieldView resignFirstResponder];
return NO;
}

上一個方法中的resignFirstResponder會隱藏鍵盤，這樣會促發另外一個方法：這里將currentTextField設為nil

-(void)textFieldDidEndEditing:(UITextField *)textFieldView{
currentTextfield = nil;
}

9.最后不要忘了在View窗口關閉之前移除前面注冊的通知：

//頁面消失前取消通知
-(void)viewWillDisappear:(BOOL)animated{
[[NSNotificationCenter defaultCenter]
removeObserver:self
name:UIKeyboardDidShowNotification
object:nil];
[[NSNotificationCenter defaultCenter]
removeObserver:self
name:UIKeyboardDidHideNotification
object:nil];
}

生命在于運動，先去打球，晚上回來在繼續，哈哈。