Question

如何在集合视图的顶部添加自定义视图？我想使用Xcode用户界面设计自定义视图我在storyBoard视图控制器中添加了我的视图，但集合视图覆盖了它所以我在viewDidLoad

中添加了一个自定义视图

- (void)viewDidLoad {
    [super viewDidLoad];
    [self addViewOnTop];
    }
}
-(void)addViewOnTop {

    UIView *selectableView = [[UIView alloc]initWithFrame:CGRectMake(0, 60, self.view.bounds.size.width, 40)];
    selectableView.backgroundColor = [UIColor redColor];
    UILabel *randomViewLabel = [[UILabel alloc]initWithFrame:CGRectMake(20, 10, 100, 16)];
    randomViewLabel.text = @"RandomView";
    [selectableView addSubview:randomViewLabel];
    [self.view addSubview:selectableView];
}

此代码成功运行，但如何使用Xcode界面构建器加载视图或加载.XIB文件

现在我这样做

@implementation chatViewController

- (void)viewDidLoad {
    [super viewDidLoad];
    [SVProgressHUD dismiss];
    self.collectionView.collectionViewLayout.sectionInset = UIEdgeInsetsMake(70, 0, 0, 0);
    self.collectionView.dataSource = self;
    self.collectionView.delegate= self;
    messages = [NSMutableArray array];
    [self addMessages];
    self.collectionView.collectionViewLayout.incomingAvatarViewSize = CGSizeZero;
    self.collectionView.collectionViewLayout.outgoingAvatarViewSize = CGSizeZero;
    self.topContentAdditionalInset = 70.0f;
    UITapGestureRecognizer* tapRecognizer = [[UITapGestureRecognizer alloc] initWithTarget:self action:@selector(handleCollectionTapRecognizer:)];
    [self.collectionView addGestureRecognizer:tapRecognizer];
    self.collectionView.semanticContentAttribute = UISemanticContentAttributeForceLeftToRight;
    [self addViewOnTop];
}
-(void)addViewOnTop {
    commentsheader *test = [[commentsheader alloc]initWithFrame:CGRectMake(0, 0, self.view.bounds.size.width, 70)];
    [self.view addSubview:test];

}

但它没有帮助

Answer 1

如果我理解你遇到的真正问题是你的customView覆盖collectionView而不是修改故事板，只需调整集合视图的插图。

添加UIEdgeInset以便您在新视图下查看消息在viewDidLoad（）中调用此消息

self.collectionView?.collectionViewLayout.sectionInset = UIEdgeInsets(top: 40, left: 0, bottom: 0, right: 0)

Answer 2

您应该尝试currentView.bringSubview(toFront: <UIView instance>)

Answer 3

问题是导航栏隐藏了视图。但把它带到前面并没有解决问题但这样做修复了它：在viewDidLoad

中

self.edgesForExtendedLayout = UIRectEdgeNone;

如何向JSQMessagesViewController添加自定义视图

3 个答案: