UITableViewCellStyleSubtitle单元格的分隔线未占用整个宽度 [英] Separator lines for UITableViewCellStyleSubtitle cells not taking the full width

问题描述

我已为我的问题准备了）不适应细胞和三编辑以增加行高，但这没有帮助。

此外，我还尝试将自定义插入设置为自定义并且左为0像素（表视图和 MyCell ），但左侧仍有间隙：

这里是 TableViewController.m ：

   - （void）viewDidLoad {
 [super viewDidLoad]; 
 
 self.items = [[NSMutableArray alloc] initWithArray：@ [
 @ {@title：@Title 1，@subtitle：@Sub Title 1， @icon：@signal4.png}，
 @ {@title：@Title 2，@subtitle：@Sub Title 2，@icon：@signal1 .png}，
 @ {@title：@Title 3，@subtitle：@Sub Title 3，@icon：@signal2.png}，
 @ {@title：@Title 4，@subtitle：@Sub Title 4，@icon：@signal3.png} 
]]; 
} 
 
 #pragma mark  - 表视图数据源
  - （NSInteger）numberOfSectionsInTableView：（UITableView *）tableView {
 return 1; 
} 
 
  - （NSInteger）tableView：（UITableView *）tableView numberOfRowsInSection：（NSInteger）section {
 return self.items.count; 
} 
 
  - （UITableViewCell *）tableView：（UITableView *）tableView cellForRowAtIndexPath：（NSIndexPath *）indexPath {
 UITableViewCell * cell = [tableView dequeueReusableCellWithIdentifier：@MyCellforIndexPath ：indexPath]; 
 
 NSDictionary * item = [self.items objectAtIndex：indexPath.row]; 
 cell.textLabel.text = item [@title]; 
 cell.detailTextLabel.text = item [@subtitle]; 
 UIImage * icon = [UIImage imageNamed：item [@icon]]; 
 [cell.imageView setImage：icon]; 
 
返回单元格; 
} 
  

更新：此答案的源代码包含最后帮助我：
iOS 8 UITableView分隔符插入0不工作

   - （void）tableView：（UITableView *）tableView willDisplayCell：（UITableViewCell *）cell forRowAtIndexPath：（NSIndexPath *）indexPath 
 {
 //删除分隔符插入
 if（[cell respondsToSelector：@selector（setSeparatorInset :)]）{
 [cell setSeparatorInset：UIEdgeInsetsZero]; 
} 
 
 //阻止单元格继承表格视图的边距设置
 if（[cell respondsToSelector：@selector（setPreservesSuperviewLayoutMargins :)]）{
 [cell setPreservesSuperviewLayoutMargins：NO]; 
} 
 
 //显式设置单元格的布局边距
 if（[cell respondsToSelector：@selector（setLayoutMargins :)]）{
 [cell setLayoutMargins：UIEdgeInsetsZero] ; 
} 
} 
 
 / * 
  - （无效）viewDidLayoutSubviews 
 {
 [super viewDidLayoutSubviews]; 
 
 //强制你的tableview边距（这可能是一个坏主意）
 if（[self.tableView respondsToSelector：@selector（setSeparatorInset :)]）{
 [self。 tableView setSeparatorInset：UIEdgeInsetsZero]; 
} 
 
 if（[self.tableView respondsToSelector：@ selector（setLayoutMargins :)]）{
 [self.tableView setLayoutMargins：UIEdgeInsetsZero]; 
} 
} 
 * / 
  

解决方案

将表视图分隔符插入添加到零。不只是表视图单元格。

在 cellForRowAtIndexPath 中添加此代码：

   - （UITableViewCell *）tableView：（UITableView *）tableView cellForRowAtIndexPath：（NSIndexPath *）indexPath 
 {
 // .... 
 if（ [[[UIDevice currentDevice] systemVersion] floatValue]> = 8.0）
 {
 cell.layoutMargins = UIEdgeInsetsZero; 
 cell.preservesSuperviewLayoutMargins = NO; 
} 
} 
  

与代码集成：

   - （UITableViewCell *）tableView：（UITableView *）tableView cellForRowAtIndexPath：（NSIndexPath *）indexPath {
 UITableViewCell * cell = [tableView dequeueReusableCellWithIdentifier： @MyCellforIndexPath：indexPath]; 
 
 if（[[[[UIDevice currentDevice] systemVersion] floatValue]> = 8.0）
 {
 cell.layoutMargins = UIEdgeInsetsZero; 
 cell.preservesSuperviewLayoutMargins = NO; 
} 
 
 NSDictionary * item = [self.items objectAtIndex：indexPath.row]; 
 cell.textLabel.text = item [@title]; 
 cell.detailTextLabel.text = item [@subtitle]; 
 UIImage * icon = [UIImage imageNamed：item [@icon]]; 
 [cell.imageView setImage：icon]; 
 
返回单元格; 
} 
  

查看预览：

I have prepared a simple test project for my question at GitHub.

When using UITableViewCellStyleSubtitle type of cells (called Subtitle in Xcode Interface Builder) - for some reason the horizontal lines are not reaching the left side of the screen:

At the above screenshot you can see that the separator lines in "empty cells" are occupying the whole width just fine.

First I thought that the icons (size: 46 x 46 pixels) were not fitting into the cells and tried to increase the row height, but this does not help.

Also I have tried to set Custom Insets to Custom and there Left to 0 pixels (both for Table View and for MyCell), but there is still a gap on the left side:

Here the source code of my TableViewController.m:

- (void)viewDidLoad {
    [super viewDidLoad];

    self.items = [[NSMutableArray alloc] initWithArray:@[
        @{@"title": @"Title 1", @"subtitle": @"Sub Title 1", @"icon": @"signal4.png"},
        @{@"title": @"Title 2", @"subtitle": @"Sub Title 2", @"icon": @"signal1.png"},
        @{@"title": @"Title 3", @"subtitle": @"Sub Title 3", @"icon": @"signal2.png"},
        @{@"title": @"Title 4", @"subtitle": @"Sub Title 4", @"icon": @"signal3.png"}
    ]];
}

#pragma mark - Table view data source
- (NSInteger)numberOfSectionsInTableView:(UITableView *)tableView {
    return 1;
}

- (NSInteger)tableView:(UITableView *)tableView numberOfRowsInSection:(NSInteger)section {
    return self.items.count;
}

- (UITableViewCell *)tableView:(UITableView *)tableView cellForRowAtIndexPath:(NSIndexPath *)indexPath {
    UITableViewCell *cell = [tableView dequeueReusableCellWithIdentifier:@"MyCell" forIndexPath:indexPath];

    NSDictionary* item = [self.items objectAtIndex:indexPath.row];
    cell.textLabel.text = item[@"title"];
    cell.detailTextLabel.text = item[@"subtitle"];
    UIImage* icon = [UIImage imageNamed:item[@"icon"]];
    [cell.imageView setImage:icon];

    return cell;
}

UPDATE: The source code from this answer has helped me at the end: iOS 8 UITableView separator inset 0 not working

-(void)tableView:(UITableView *)tableView willDisplayCell:(UITableViewCell *)cell forRowAtIndexPath:(NSIndexPath *)indexPath
{
    // Remove seperator inset
    if ([cell respondsToSelector:@selector(setSeparatorInset:)]) {
           [cell setSeparatorInset:UIEdgeInsetsZero];
    }

    // Prevent the cell from inheriting the Table View's margin settings
    if ([cell respondsToSelector:@selector(setPreservesSuperviewLayoutMargins:)]) {
        [cell setPreservesSuperviewLayoutMargins:NO];
    }

    // Explictly set your cell's layout margins
    if ([cell respondsToSelector:@selector(setLayoutMargins:)]) {
        [cell setLayoutMargins:UIEdgeInsetsZero];
    }
}

/*
-(void)viewDidLayoutSubviews
{
    [super viewDidLayoutSubviews];

    // Force your tableview margins (this may be a bad idea)
    if ([self.tableView respondsToSelector:@selector(setSeparatorInset:)]) {
        [self.tableView setSeparatorInset:UIEdgeInsetsZero];
    }

    if ([self.tableView respondsToSelector:@selector(setLayoutMargins:)]) {
        [self.tableView setLayoutMargins:UIEdgeInsetsZero];
    }
} 
*/

解决方案

Add Table View Separator Insets to Zero. Not Just for Table View Cell.

Add this code in cellForRowAtIndexPath:

-(UITableViewCell *)tableView:(UITableView *)tableView cellForRowAtIndexPath:(NSIndexPath *)indexPath
{
    //....
    if ([[[UIDevice currentDevice]systemVersion]floatValue]>=8.0)
    {
        cell.layoutMargins = UIEdgeInsetsZero;
        cell.preservesSuperviewLayoutMargins = NO;
    }
}

Integration with your code :

- (UITableViewCell *)tableView:(UITableView *)tableView cellForRowAtIndexPath:(NSIndexPath *)indexPath {
    UITableViewCell *cell = [tableView dequeueReusableCellWithIdentifier:@"MyCell" forIndexPath:indexPath];

    if ([[[UIDevice currentDevice]systemVersion]floatValue]>=8.0)
    {
        cell.layoutMargins = UIEdgeInsetsZero;
        cell.preservesSuperviewLayoutMargins = NO;
    }

    NSDictionary* item = [self.items objectAtIndex:indexPath.row];
    cell.textLabel.text = item[@"title"];
    cell.detailTextLabel.text = item[@"subtitle"];
    UIImage* icon = [UIImage imageNamed:item[@"icon"]];
    [cell.imageView setImage:icon];

    return cell;
}

See the preview :

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