UIView在UIScrollVIew不更新視圖

我有一個UIView在UIScrollView內部佈局。有一種稱爲更新UI的方法，它基本上更新了UI。然而，在數據加載後，我需要向下滾動一下以查看呈現的UI。例如，我試過的一件事是在layoutSubviews中隱藏UITableView，並在updateUI中取消隱藏，但是我需要向下滾動一下UIScrollView，直到看到UITableView。這是爲什麼發生？這裏是我更新的UI代碼：UIView在UIScrollVIew不更新視圖

這個updateUI代碼基本上是在UIScrollView沒有滾動時觸發的。我有一個帶有UIScrollView的MyViewController，它實現了UIScrollView委託，並且基本上當它不滾動時，委託給我的UIView，告訴你現在可以更新視圖。

- (void) updateUI 
{ 
    self.isScrolling = NO; 

    NSLog(@"UPDATE UI"); 

    AHMyImageData *object = self.object; 

    if ([object isNotNull]){ 

    [self.tableView_ reloadData]; 

    if (![self.userProfileImage_.image isNotNull]){ 
     [self.userProfileImage_ setImageWithURL:[NSURL URLWithString:object.profilePicture_] andAnimate:YES]; 
    } 

    if (![self.imageView_.image isNotNull]){ 
     NSString *url = [[object.image_ valueForKey:@"low_resolution"] valueForKey:@"url"]; 
     [self.imageView_ setImageWithURL:[NSURL URLWithString:url] andAnimate:YES]; 
    } 

    if (object.userHasLiked){ 
     [self.likeButton_ setImage:[UIImage imageNamed:@"btn-like-down.png"] forState:UIControlStateNormal]; 
    } else { 
     [self.likeButton_ setImage:[UIImage imageNamed:@"btn-like.png"] forState:UIControlStateNormal]; 
    } 

    if ([object.text_ isNotNull]){ 
     NSMutableAttributedString * attributedString = [NSMutableAttributedString attributedStringWithString:object.text_]; 
     [attributedString setFont:[UIFont fontWithName:@"HelveticaNeue" size:15]]; 
     [self.titleLabel_ setAttributedText:attributedString]; 
     [self parseTagsInComment:object.text_]; 
    } 

    NSMutableAttributedString * usernameAttributedString = [NSMutableAttributedString attributedStringWithString:object.username_]; 
    [usernameAttributedString setFont:[UIFont fontWithName:@"HelveticaNeue" size:14]]; 
    [usernameAttributedString setTextColor:[UIColor colorWithRed:86.0/255.0 green:134.0/255.0 blue:172.0/255.0 alpha:1.0] range:NSMakeRange(0, [object.username_ length])]; 
    [usernameAttributedString setTextBold:YES range:NSMakeRange(0, [object.username_ length])]; 

    [self.usernameLabel_ setAttributedText:usernameAttributedString]; 

    NSString * imageCreatorUsernameURL = [NSString stringWithFormat:@"userid://%@", object.userId_]; 
    [self.usernameLabel_ addCustomLink:[NSURL URLWithString:imageCreatorUsernameURL] inRange:NSMakeRange(0, [object.username_ length])]; 
    [self.usernameLabel_ setUnderlineLinks:NO]; 
    [self.usernameLabel_ setDelegate:self]; 

    [self.likesCountLabel_ setText:[NSString stringWithFormat:@"%d", object.likesCount]]; 
    [self.commentsCountLabel_ setText:[NSString stringWithFormat:@"%d", object.commentsCount]]; 

    if ([object.createdTime_ isNotNull]){ 
     [self.imageTimePostedLabel_ setText:[NSString timestampToString:object.createdTime_]]; 
    } 


    [self setNeedsDisplay]; 
    [self setNeedsLayout]; 

    } else { 
     NSLog(@"OBJECT IS NULL"); 
    } 
}

來源

2012-06-17 xonegirlz

聽起來好像你是從'UIScrollViewDelegate'方法調用'updateUIView' - 如果這是真的，哪一個？ – Barjavel

嘗試調用...

[self.tableView_ reloadData]; 
// I think you need to call reloadData only 
// AFTER you do all your fun updating stuff 
[self setNeedsDisplay]; 
[self setNeedsLayout];

在你的函數的末尾，而不是在一開始。希望有所幫助！

來源

2012-06-17 19:12:23 UXUiOS

UIView在UIScrollVIew不更新視圖

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