滚动视图中的 UITable 还是表视图标题？

Question

我目前正在构建一个应用程序，我在其中将一些数据解析为UITableView。我正在使用自定义的 UITableViewCell 类。

我想在UITableView 之前和顶部添加一个UIImage，就像下面的UIImage 一样。我的问题是我是否应该努力制作一个包含UIImage 的自定义UITableView 标题视图？或者我是否应该将UITableView 和UIImageView 放在UIScrollView 中？

我该怎么做？

当我滚动 UITableView 时，我希望顶部的 UIImage 消失，就像它是表格视图中的一行一样。

图片（John Mayer on Tour 应用程序：

我真的很感激一些解决方案！

谢谢。

编辑：

这是完整的 .m 代码：​​

#import "DEMOSecondViewController.h"
#import "DEMONavigationController.h"
#import "PostsObject.h"
#import "RNBlurModalView.h"
#import "AFNetworking.h"
#import "PostsNextView.h"

#import "KIImagePager.h"
#import "TableHeaderView.h"

#import "DEMOMenuViewController.h"
#import "UIViewController+REFrostedViewController.h"

@interface DEMOSecondViewController ()  <KIImagePagerDelegate, KIImagePagerDataSource>
{
    IBOutlet KIImagePager *_imagePager;
}

@end

@implementation DEMOSecondViewController
@synthesize tableView = _tableView, activityIndicatorView = _activityIndicatorView;
@synthesize fontForCellText;
@synthesize btnFaceBook, btnTwitter, btnTwitter2;
@synthesize strURLToLoad;
@synthesize movies;

- (IBAction)showButtonMenu {
    [self.frostedViewController presentMenuViewController];
}

- (void)refresh:(UIRefreshControl *)refreshControl {
    [refreshControl endRefreshing];
}

- (void)viewDidLoad
{
    [super viewDidLoad];
    // Do any additional setup after loading the view, typically from a nib.
    
    UIRefreshControl *refreshControl = [[UIRefreshControl alloc] init];
    [refreshControl setTintColor:[UIColor greenColor]];
    [refreshControl addTarget:self action:@selector(refresh:) forControlEvents:UIControlEventValueChanged];
    [self.tableView addSubview:refreshControl];
    
    strURLToLoad = [[NSMutableString alloc] init];
    
    [btnFaceBook setTitle:@"link-1" forState:UIControlStateDisabled];
    [btnTwitter setTitle:@"link-2" forState:UIControlStateDisabled];
    [btnTwitter2 setTitle:@"link-3" forState:UIControlStateDisabled];
    
    [btnFaceBook setBackgroundImage:[UIImage imageNamed:@"tab_selected.png"] forState:UIControlStateNormal];
    [btnFaceBook setBackgroundImage:[UIImage imageNamed:@"tab_unselected.png"] forState:UIControlStateSelected];
    
    [btnTwitter setBackgroundImage:[UIImage imageNamed:@"tab_selected.png"] forState:UIControlStateNormal];
    [btnTwitter setBackgroundImage:[UIImage imageNamed:@"tab_unselected.png"] forState:UIControlStateSelected];
    
    [btnTwitter2 setBackgroundImage:[UIImage imageNamed:@"tab_selected.png"] forState:UIControlStateNormal];
    [btnTwitter2 setBackgroundImage:[UIImage imageNamed:@"tab_unselected.png"] forState:UIControlStateSelected];
    
    
    
    NSArray *nib = [[NSBundle mainBundle] loadNibNamed:@"PostsObject" owner:self options:nil];
    PostsObject *cell = [nib objectAtIndex:0];
    fontForCellText = cell.title.font;
    cellTextWidth = cell.title.frame.size.width;
    cellHeightExceptText = cell.frame.size.height - cell.title.frame.size.height;
    
    [self.navigationController setNavigationBarHidden:YES];
    
    self.tableView.separatorColor = [UIColor clearColor];
    
    // Setting Up Activity Indicator View
    self.activityIndicatorView = [[UIActivityIndicatorView alloc] initWithActivityIndicatorStyle:UIActivityIndicatorViewStyleWhiteLarge];
    
    self.activityIndicatorView.color = [UIColor greenColor];
    
    
    self.activityIndicatorView.hidesWhenStopped = YES;
    self.activityIndicatorView.center = self.view.center;
    [self.view addSubview:self.activityIndicatorView];
    [self.activityIndicatorView startAnimating];
    self.tableView.separatorColor = [UIColor clearColor];
    
    // Initializing Data Source
    movies = [[NSMutableArray alloc] init];
    
    [self btnFromTabBarClicked:btnFaceBook];
}

-(UIStatusBarStyle)preferredStatusBarStyle{
    return UIStatusBarStyleLightContent;
}

- (void)loadJSONFromCurrentURL
{
    [self.activityIndicatorView startAnimating];
    
    NSURLRequest *request = [[NSURLRequest alloc] initWithURL:[NSURL URLWithString:strURLToLoad]];
    
    AFJSONRequestOperation *operation = [AFJSONRequestOperation JSONRequestOperationWithRequest:request success:^(NSURLRequest *request, NSHTTPURLResponse *response, id JSON) {
        [movies setArray:JSON];
        [self.activityIndicatorView stopAnimating];
        [self.tableView reloadData];
        
    } failure:^(NSURLRequest *request, NSHTTPURLResponse *response, NSError *error, id JSON) {
        NSLog(@"Request Failed with Error: %@, %@", error, error.userInfo);
    }];
    
    [operation start];
}

- (IBAction)btnFromTabBarClicked:(UIButton *)sender
{
    //Unselect all 3 buttons
    btnFaceBook.selected = btnTwitter.selected = btnTwitter2.selected = NO;
    
    //Select the button that was clicked
    sender.selected = YES;
    
    //Set the string of an NSMutableString property called strURLToLoad with the URL
    //The URL is pre stored in the text of the UIButton in the Disabled text.
    [strURLToLoad setString:[sender titleForState:UIControlStateDisabled]];
    
    //Load the URL
    [self loadJSONFromCurrentURL];
}

// How can I set an if-statement here? If the section is 0, return only 1 row, otherwise, the if (movies) function...

- (NSInteger)tableView:(UITableView *)tableView numberOfRowsInSection:(NSInteger)section {
    if (movies && movies.count) {
        return movies.count;
    } else {
        return 0;
    }
}

- (NSInteger)numberOfSectionsInTableView:(UITableView *)tableView {
    return 2;
}

- (UITableViewCell *)tableView:(UITableView *)tableView cellForRowAtIndexPath:(NSIndexPath *)indexPath {
    if (indexPath.section == 0) {
        static NSString *Identifier1 = @"TableHeaderView";
        // cell type 1
        TableHeaderView *cell = [tableView dequeueReusableCellWithIdentifier:Identifier1];
        if (cell == nil) {
            NSArray *nib= [[NSBundle mainBundle] loadNibNamed:@"TableHeaderView" owner:self options:nil];
            cell = (TableHeaderView *)[nib objectAtIndex:0];
        }
        
        //set the image on the cell
        
        return cell;
    } else {
        
        static NSString *Identifier2 = @"PostsObject";
        // cell type 2
        PostsObject *cell = [tableView dequeueReusableCellWithIdentifier:Identifier2];
        if (cell == nil) {
            NSArray *nib= [[NSBundle mainBundle] loadNibNamed:@"PostsObject" owner:self options:nil];
            cell = (PostsObject *)[nib objectAtIndex:0];
        }
        
        NSDictionary *movie = [self.movies objectAtIndex:indexPath.row];
        NSString *strText = [movie objectForKey:[self getTextKey]];
        
        CGRect rect = cell.title.frame;
        rect.size.height = [self getHeightForText:strText];
        cell.title.frame = rect;
        cell.title.text = strText;
        cell.arrow.center = CGPointMake(cell.arrow.frame.origin.x, rect.origin.y + rect.size.height/2);
        cell.published.text = [movie objectForKey:[self getPostedTime]];
        cell.twitterName.text = [movie objectForKey:[self getTwitterName]];
        return cell;
    }
}

- (void)tableView:(UITableView *)tableView didSelectRowAtIndexPath:(NSIndexPath *)indexPath {
    [tableView deselectRowAtIndexPath:indexPath animated:YES];
    
    NSDictionary *selectedMovie = self.movies[indexPath.row];
    
    PostsNextView *nextVC = [[PostsNextView alloc] initWithDictionary:movies];
    
    [self.navigationController pushViewController:nextVC animated:YES];
}

- (CGFloat)tableView:(UITableView *)tableView heightForRowAtIndexPath:(NSIndexPath *)indexPath
{
    NSDictionary *movie = [self.movies objectAtIndex:indexPath.row];
    NSString *strText = [movie objectForKey:[self getTextKey]];
    
    CGFloat cellHeight = cellHeightExceptText + [self getHeightForText:strText];
    
    return cellHeight;
}

- (NSString *)getTextKey
{
    return btnTwitter.selected?@"tweet":@"message";
}

- (NSString *)getPostedTime
{
    return btnTwitter.selected?@"posted":@"published";
}

- (NSString *)getTwitterName
{
    return btnTwitter2.selected?@"user":@"celebname";
}

- (CGFloat)getHeightForText:(NSString *)strText
{
    CGSize constraintSize = CGSizeMake(cellTextWidth, MAXFLOAT);
    CGSize labelSize = [strText sizeWithFont:fontForCellText constrainedToSize:constraintSize lineBreakMode:NSLineBreakByWordWrapping];
    NSLog(@"labelSize.height = %f",labelSize.height);
    return labelSize.height;
}


@end

Answer 1

当你说

时，你回答了你自己的问题

我希望顶部的图像消失，就像它是 表格视图

图像应该只是表格视图中的一行。 最好的可能是设置不同的部分，图像在 #0 部分，在 #1 部分休息。

您将创建不同类型的单元格，一种用于突发新闻，另一种用于图像。

- (UITableViewCell *)tableView:(UITableView *)tableView cellForRowAtIndexPath:(NSIndexPath *)indexPath {
    if (indexPath.section == 0) {
        static NSString *Identifier1 = @"CellType1";
        // cell type 1
        CellType1 *cell = [tableView dequeueReusableCellWithIdentifier:Identifier1];
        if (cell == nil) {
            NSArray *nib= [[NSBundle mainBundle] loadNibNamed:@"CellType1" owner:self options:nil];
            cell = (CellType1 *)[nib objectAtIndex:0];    
        }

        //set the image on the cell

        return cell;
    } else {
        static NSString *Identifier1 = @"CellType2";
        // cell type 2
        CellType2 *cell = [tableView dequeueReusableCellWithIdentifier:Identifier2];
        if (cell == nil) {
            NSArray *nib= [[NSBundle mainBundle] loadNibNamed:@"CellType2" owner:self options:nil];
            cell = (CellType2 *)[nib objectAtIndex:0];     
        }

        // set cell with breaking news stuff

        return cell;
    }
}

确保设置了部分的数量

- (NSInteger)numberOfSectionsInTableView:(UITableView *)tableView {
    return 2;
}

还要确保为每种细胞类型使用不同的细胞标识符

如果要在第一部分中只获取一行，请确保进行相应设置

- (NSInteger)tableView:(UITableView *)tableView numberOfRowsInSection:(NSInteger)section {
    if (section==0) {
        return 1;
    } else {
        return BREAKING_NEWS_COUNT;
    }
}