我怎樣才能刪除滾動視圖？

Question

我有一個viewcontroller設置爲scrollview委託（scrollview是viewcontroller的子視圖），當我把[scrollview removeFromSuperview]; viewcontroller和scrollview都被刪除，我只剩下一個空的窗口。

如何只刪除滾動視圖？

編輯::::

這是我的ViewController的一部分.H

@interface QuartzViewController : UIViewController <UIScrollViewDelegate> { 

這是我的視圖控制器的.m

- (void)willAnimateRotationToInterfaceOrientation:(UIInterfaceOrientation)toInterfaceOrientation duration:(NSTimeInterval)duration { 
UIInterfaceOrientation o = self.interfaceOrientation; 
if ((o == UIInterfaceOrientationPortrait) || (o == UIInterfaceOrientationPortraitUpsideDown)) {D = 1;pagingScrollView.delegate = nil;[pagingScrollView removeFromSuperview];[self resurrectPaging];} 
if ((o == UIInterfaceOrientationLandscapeLeft) || (o == UIInterfaceOrientationLandscapeRight)) {D = 2;pagingScrollView.delegate = nil;[pagingScrollView removeFromSuperview];[self resurrectPaging];}} 

-(void)resurrectPaging { 
CGRect F; 
F = [self frameForPagingScrollView]; 
pagingScrollView = [[UIScrollView alloc] initWithFrame:F]; 
[SELF addSubview:pagingScrollView]; 
[self setPaging];} 

- (void)viewDidLoad { 
[self.view addSubview:SELF]; 
D = 1; 
CGRect F; 
F = [self frameForPagingScrollView]; 
pagingScrollView = [[UIScrollView alloc] initWithFrame:F]; 
[self setPaging];} 



- (void)setPaging { 
if (D == 1) { 
    CGRect F; 
    F = [self frameForPagingScrollView]; 
    pagingScrollView.pagingEnabled = YES; 
    pagingScrollView.backgroundColor = [UIColor whiteColor]; 
    pagingScrollView.showsVerticalScrollIndicator = NO; 
    pagingScrollView.showsHorizontalScrollIndicator = NO; 
    pagingScrollView.contentSize = CGSizeMake(F.size.width * [self pdfPageCount], F.size.height); 
    pagingScrollView.delegate = self; 
    pagingScrollView.clipsToBounds = YES; 
    pagingScrollView.bounces = YES; 
    self.view = pagingScrollView; 
    recycledPages = [[NSMutableSet alloc] init]; 
    visiblePages = [[NSMutableSet alloc] init]; 
    [self tilePages]; 
    [pagingScrollView addSubview:self.isvP];} 
else if (D == 2) { 
    CGRect F; 
    F = [self frameForPagingScrollView]; 
    pagingScrollView.pagingEnabled = YES; 
    pagingScrollView.backgroundColor = [UIColor redColor]; 
    pagingScrollView.showsVerticalScrollIndicator = NO; 
    pagingScrollView.showsHorizontalScrollIndicator = NO; 
    pagingScrollView.contentSize = CGSizeMake(F.size.width * [self pdfPageCount], F.size.height); 
    pagingScrollView.delegate = self; 
    pagingScrollView.clipsToBounds = YES; 
    pagingScrollView.bounces = YES; 
    self.view = pagingScrollView; 
    recycledPages = [[NSMutableSet alloc] init]; 
    visiblePages = [[NSMutableSet alloc] init]; 
    [self tilePages]; 
    [pagingScrollView addSubview:self.isvL];}} 

基本原因，我該怎麼去除的一部分那麼再次添加我的滾動視圖是因爲當設備方向改變爲橫向時，我的橫向子視圖位於錯誤的位置（x，y）。

但說如果我開始在風景isvL是在正確的地方，所以我知道我得到的代碼正確。去風景螺絲在我的pagingScrollView isvL的x，y位置！

Answer 1

基本上我之所以刪除然後添加我的滾動視圖是因爲當設備的方向改變爲風景我的風景子視圖在錯誤的地方（x，y）。

如果您在定位滾動視圖時遇到問題，應嘗試正確設置自動調整大小的遮罩或手動調整幀。沒有理由每次刪除並重新創建滾動視圖。

此外，在您列出的代碼中，您似乎泄漏了滾動視圖。