都在注釋里

//增加監(jiān)聽(tīng)佳励，當(dāng)鍵盤(pán)出現(xiàn)或改變時(shí)收出消息
    [[NSNotificationCenter defaultCenter] addObserver:self selector:@selector(keyboardWillShow:) name:UIKeyboardWillShowNotification object:nil];
    
    //增加監(jiān)聽(tīng)奔缠，當(dāng)鍵退出時(shí)收出消息
    [[NSNotificationCenter defaultCenter] addObserver:self selector:@selector(keyboardWillHide:) name:UIKeyboardWillHideNotification object:nil];

- (void)keyboardWillShow:(NSNotification *)aNotification{
    
    NSDictionary *userInfo = [aNotification userInfo];
    NSValue *aValue = [userInfo objectForKey:UIKeyboardFrameEndUserInfoKey];
    CGRect keyboardRect = [aValue CGRectValue];
    int height = keyboardRect.size.height;
    
    // 設(shè)置動(dòng)畫(huà)的名字
    [UIView beginAnimations:@"Animation" context:nil];
    // 設(shè)置動(dòng)畫(huà)的間隔時(shí)間
    [UIView setAnimationDuration:0.20];
    // 使用當(dāng)前正在運(yùn)行的狀態(tài)開(kāi)始下一段動(dòng)畫(huà)
    [UIView setAnimationBeginsFromCurrentState: YES];
    // 獲取到textfiled 距底部距離
    int textToTop = self.view.frame.size.height - self.numberTextFiled.frame.origin.y - self.numberTextFiled.frame.size.height;
    
    if (textToTop > height) {
        // 如果鍵盤(pán)高度小于textfiled距底部的距離 則不需要任何操作
    }else{
        // 當(dāng)textToTop 小于 height 時(shí)
        // 獲取到鍵盤(pán)高度和控件底部距離的差值
        int scrolldistance = height - textToTop;
        // 移動(dòng)視圖y 差值距離
        self.view.frame = CGRectMake(self.view.frame.origin.x, self.view.frame.origin.y - scrolldistance, self.view.frame.size.width, self.view.frame.size.height);
    }
    //設(shè)置動(dòng)畫(huà)結(jié)束
    
    [UIView commitAnimations];
    
    
}

//當(dāng)鍵退出時(shí)調(diào)用
- (void)keyboardWillHide:(NSNotification *)aNotification{
    // 設(shè)置動(dòng)畫(huà)的名字
    [UIView beginAnimations:@"Animation" context:nil];
    // 設(shè)置動(dòng)畫(huà)的間隔時(shí)間
    [UIView setAnimationDuration:0.20];
    // 使用當(dāng)前正在運(yùn)行的狀態(tài)開(kāi)始下一段動(dòng)畫(huà)
    [UIView setAnimationBeginsFromCurrentState: YES];
    // 設(shè)置視圖移動(dòng)的位移至原來(lái)的y值
    self.view.frame = CGRectMake(self.view.frame.origin.x, 0, self.view.frame.size.width, self.view.frame.size.height);
    //設(shè)置動(dòng)畫(huà)結(jié)束
    [UIView commitAnimations];
    
}