// Called when the UIKeyboardDidShowNotification is sent.- (void)keyboardWasShown:(NSNotification*)aNotification{    NSDictionary* info = [aNotification userInfo];    CGSize kbSize = [[info objectForKey:UIKeyboardFrameBeginUserInfoKey] CGRectValue].size;     UIEdgeInsets contentInsets = UIEdgeInsetsMake(0.0, 0.0, kbSize.height, 0.0);    scrollView.contentInset = contentInsets;    scrollView.scrollIndicatorInsets = contentInsets;     // If active text field is hidden by keyboard, scroll it so it's visible    // Your application might not need or want this behavior.    CGRect aRect = self.view.frame;    aRect.size.height -= kbSize.height;    if (!CGRectContainsPoint(aRect, activeField.frame.origin) ) { //判斷該text field是否在可見(jiàn)區(qū)域        CGPoint scrollPoint = CGPointMake(0.0, instance); //這里需要計(jì)算需要scroll的長(zhǎng)度，假設(shè)instance是計(jì)算出來(lái)的結(jié)果。        [scrollView setContentOffset:scrollPoint animated:YES];    }}

-(void) loadPageView:(NSUInteger)page{    UIView* view = [[UIView alloc] init];    view.backgroundColor = [UIColor whiteColor];        CGRect rc = self.view.frame;    rc.origin.y = 0;    rc.origin.x = page * self.view.frame.size.width;  //創(chuàng)建一個(gè)view，調(diào)整x直，因?yàn)槠渌焙蛃croll view都是一樣的    view.frame = rc;        UILabel* label = [[UILabel alloc] initWithFrame:CGRectMake(0, 20, rc.size.width, 40)];    label.text = [NSString stringWithFormat:@"current page is :%d", page];    [view addSubview:label];        [(UIScrollView*)self.view addSubview:view];}- (void)scrollViewDidScroll:(UIScrollView *)scrollView{    if (scrollView.contentOffset.x >= (myCurrentPage+0.5) * self.view.frame.size.width) //需要顯示下一頁(yè)了    {        myCurrentPage++;        [self loadPageView:myCurrentPage];    }}