UITableViewCell – 每个部分勾选一行

我有2个部分，每个3行如下：

  1. search距离

    • 250英尺

    • 1000英尺

    • 4000英尺

  2. 地图types

    • 标准

    • 卫星

    • 混合动力

我想每个部分有一个复选标记，但是我的当前代码将取消选中整个表格视图的所有可见单元格，并使用复选标记保留一个选定的行。 换句话说，我将在整个表格中有一个复选标记（2个部分）。 在这里我发布了我的整个代码。 我有谷歌很多，但似乎没有解决我的问题。 任何人，请帮助纠正我的代码。 提前致谢。 

#import "PAWSettingsViewController.h" #import "PAWAppDelegate.h" #import <Parse/Parse.h> @interface PAWSettingsViewController () - (NSString *)distanceLabelForCell:(NSIndexPath *)indexPath; - (PAWLocationAccuracy)distanceForCell:(NSIndexPath *)indexPath; - (NSString *)maptypeLabelForCell:(NSIndexPath *)indexPath; - (PAWMaptypeSelect)maptypeForCell:(NSIndexPath *)indexPath; @property (nonatomic, assign) CLLocationAccuracy filterDistance; @end typedef enum { kPAWSettingsTableViewDistance = 0, kPAWSettingsTableViewMaptype, kPAWSettingsTableViewNumberOfSections } kPAWSettingsTableViewSections; typedef enum { kPAWSettingsTableViewDistanceSection250FeetRow = 0, kPAWSettingsTableViewDistanceSection1000FeetRow, kPAWSettingsTableViewDistanceSection4000FeetRow, kPAWSettingsTableViewDistanceNumberOfRows } kPAWSettingsTableViewDistanceSectionRows; typedef enum { kPAWSettingsTableViewMaptypeSectionStandardRow = 0, kPAWSettingsTableViewMaptypeSectionSatelliteRow, kPAWSettingsTableViewMaptypeSectionHybridRow, kPAWSettingsTableViewMaptypeNumberOfRows } kPAWSettingsTableViewMaptypeSectionRows; @implementation PAWSettingsViewController @synthesize tableView; @synthesize filterDistance; - (id)initWithNibName:(NSString *)nibNameOrNil bundle:(NSBundle *)nibBundleOrNil { self = [super initWithNibName:nibNameOrNil bundle:nibBundleOrNil]; if (self) { // Custom initialization PAWAppDelegate *appDelegate = [[UIApplication sharedApplication] delegate]; self.filterDistance = appDelegate.filterDistance; } return self; } #pragma mark - Custom setters // Always fault our filter distance through to the app delegate. We just cache it locally because it's used in the tableview's cells. - (void)setFilterDistance:(CLLocationAccuracy)aFilterDistance { PAWAppDelegate *appDelegate = [[UIApplication sharedApplication] delegate]; appDelegate.filterDistance = aFilterDistance; filterDistance = aFilterDistance; } #pragma mark - View lifecycle - (BOOL)shouldAutorotateToInterfaceOrientation:(UIInterfaceOrientation)interfaceOrientation { // Return YES for supported orientations return (interfaceOrientation == UIInterfaceOrientationPortrait); } #pragma mark - Private helper methods - (NSString *)distanceLabelForCell:(NSIndexPath *)indexPath { NSString *cellText = nil; switch (indexPath.row) { case kPAWSettingsTableViewDistanceSection250FeetRow: cellText = @"250 feet"; break; case kPAWSettingsTableViewDistanceSection1000FeetRow: cellText = @"1000 feet"; break; case kPAWSettingsTableViewDistanceSection4000FeetRow: cellText = @"4000 feet"; break; case kPAWSettingsTableViewDistanceNumberOfRows: // never reached. default: cellText = @"The universe"; break; } return cellText; } - (PAWLocationAccuracy)distanceForCell:(NSIndexPath *)indexPath { PAWLocationAccuracy distance = 0.0; switch (indexPath.row) { case kPAWSettingsTableViewDistanceSection250FeetRow: distance = 250; break; case kPAWSettingsTableViewDistanceSection1000FeetRow: distance = 1000; break; case kPAWSettingsTableViewDistanceSection4000FeetRow: distance = 4000; break; case kPAWSettingsTableViewDistanceNumberOfRows: // never reached. default: distance = 10000 * kPAWFeetToMiles; break; } return distance; } - (NSString *)maptypeLabelForCell:(NSIndexPath *)indexPath { NSString *cellText = nil; switch (indexPath.row) { case kPAWSettingsTableViewMaptypeSectionStandardRow: cellText = @"Standard"; break; case kPAWSettingsTableViewMaptypeSectionSatelliteRow: cellText = @"Satellite"; break; case kPAWSettingsTableViewMaptypeSectionHybridRow: cellText = @"Hybrid"; break; case kPAWSettingsTableViewMaptypeNumberOfRows: // never reached. default: cellText = @"?"; break; } return cellText; } - (PAWMaptypeSelect)maptypeForCell:(NSIndexPath *)indexPath { PAWMaptypeSelect maptype = nil; switch (indexPath.row) { case kPAWSettingsTableViewMaptypeSectionStandardRow: maptype = @"Standard"; break; case kPAWSettingsTableViewMaptypeSectionSatelliteRow: maptype = @"Satellite"; break; case kPAWSettingsTableViewMaptypeSectionHybridRow: maptype = @"Hybrid"; break; case kPAWSettingsTableViewMaptypeNumberOfRows: // never reached. default: maptype = nil; break; } return maptype; } #pragma mark - UINavigationBar-based actions - (IBAction)done:(id)sender { [self.presentingViewController dismissModalViewControllerAnimated:YES]; } #pragma mark - UITableViewDataSource methods - (NSInteger)numberOfSectionsInTableView:(UITableView *)tableView { return kPAWSettingsTableViewNumberOfSections; } - (NSInteger)tableView:(UITableView *)tableView numberOfRowsInSection:(NSInteger)section { switch ((kPAWSettingsTableViewSections)section) { case kPAWSettingsTableViewDistance: return kPAWSettingsTableViewDistanceNumberOfRows; break; case kPAWSettingsTableViewMaptype: return kPAWSettingsTableViewMaptypeNumberOfRows; break; case kPAWSettingsTableViewNumberOfSections: return 2; break; }; } - (UITableViewCell *)tableView:(UITableView *)aTableView cellForRowAtIndexPath:(NSIndexPath *)indexPath { static NSString *identifier = @"SettingsTableView"; if (indexPath.section == kPAWSettingsTableViewDistance) { UITableViewCell *cell = [aTableView dequeueReusableCellWithIdentifier:identifier]; if ( cell == nil ) { cell = [[UITableViewCell alloc] initWithStyle:UITableViewCellStyleValue2 reuseIdentifier:identifier]; } // Configure the cell. cell.textLabel.text = [self distanceLabelForCell:indexPath]; if (self.filterDistance == 0.0) { NSLog(@"We have a zero filter distance!"); } PAWLocationAccuracy filterDistanceInFeet = self.filterDistance * ( 1 / kPAWFeetToMeters); PAWLocationAccuracy distanceForCell = [self distanceForCell:indexPath]; if (abs(distanceForCell - filterDistanceInFeet) < 0.001 ) { cell.accessoryType = UITableViewCellAccessoryCheckmark; } else { cell.accessoryType = UITableViewCellAccessoryNone; } return cell; } else if (indexPath.section == kPAWSettingsTableViewMaptype){ UITableViewCell *cell = [aTableView dequeueReusableCellWithIdentifier:identifier]; if ( cell == nil ) { cell = [[UITableViewCell alloc] initWithStyle:UITableViewCellStyleValue2 reuseIdentifier:identifier]; } // Configure the cell. cell.textLabel.text = [self maptypeLabelForCell:indexPath]; return cell; } else { return nil; } } - (NSString *)tableView:(UITableView *)tableView titleForHeaderInSection:(NSInteger)section { switch ((kPAWSettingsTableViewSections)section) { case kPAWSettingsTableViewDistance: return @"Search Distance"; break; case kPAWSettingsTableViewMaptype: return @"Map Type"; break; case kPAWSettingsTableViewNumberOfSections: return @""; break; } } #pragma mark - UITableViewDelegate methods // Called after the user changes the selection. - (void)tableView:(UITableView *)aTableView didSelectRowAtIndexPath:(NSIndexPath *)indexPath { if (indexPath.section == kPAWSettingsTableViewDistance) { [aTableView deselectRowAtIndexPath:indexPath animated:YES]; // if we were already selected, bail and save some work. UITableViewCell *selectedCell = [aTableView cellForRowAtIndexPath:indexPath]; if (selectedCell.accessoryType == UITableViewCellAccessoryCheckmark) { return; } // uncheck all visible cells. for (UITableViewCell *cell in [aTableView visibleCells]) { if (cell.accessoryType != UITableViewCellAccessoryNone) { cell.accessoryType = UITableViewCellAccessoryNone; } } selectedCell.accessoryType = UITableViewCellAccessoryCheckmark; PAWLocationAccuracy distanceForCellInFeet = [self distanceForCell:indexPath]; self.filterDistance = distanceForCellInFeet * kPAWFeetToMeters; } else if (indexPath.section == kPAWSettingsTableViewMaptype){ [aTableView deselectRowAtIndexPath:indexPath animated:YES]; // if we were already selected, bail and save some work. UITableViewCell *selectedCell = [aTableView cellForRowAtIndexPath:indexPath]; if (selectedCell.accessoryType == UITableViewCellAccessoryCheckmark) { return; } // uncheck all visible cells. for (UITableViewCell *cell in [aTableView visibleCells]) { if (cell.accessoryType != UITableViewCellAccessoryNone) { cell.accessoryType = UITableViewCellAccessoryNone; } } selectedCell.accessoryType = UITableViewCellAccessoryCheckmark; PAWMaptypeSelect maptypeForCell = [self maptypeForCell:indexPath]; } } @end

你有这个错误

//取消选中所有可见的单元格 

  for (UITableViewCell *cell in [aTableView visibleCells]) { if (cell.accessoryType != UITableViewCellAccessoryNone) { cell.accessoryType = UITableViewCellAccessoryNone; } }

这里的for循环取消select所有单元格。 你也必须检查if循环中的部分

你可以像这样为你的单元格设置标签 

  cell.tag = indexPath.section;

如果条件是for循环 

  for (UITableViewCell *cell in [aTableView visibleCells]) { if (cell.accessoryType != UITableViewCellAccessoryNone && cell.tag == indexPath.section) { cell.accessoryType = UITableViewCellAccessoryNone; } }

在你的代码中的问题是，你只勾选标记行0部分replace下面的方法，你可以解决你的问题。 

  - (UITableViewCell *)tableView:(UITableView *)aTableView cellForRowAtIndexPath:(NSIndexPath *)indexPath { static NSString *identifier = @"SettingsTableView"; if (indexPath.section == kPAWSettingsTableViewDistance) { UITableViewCell *cell = [aTableView dequeueReusableCellWithIdentifier:identifier]; if ( cell == nil ) { cell = [[UITableViewCell alloc] initWithStyle:UITableViewCellStyleValue2 reuseIdentifier:identifier]; } // Configure the cell. cell.textLabel.text = [self distanceLabelForCell:indexPath]; if (self.filterDistance == 0.0) { NSLog(@"We have a zero filter distance!"); } PAWLocationAccuracy filterDistanceInFeet = self.filterDistance * ( 1 / kPAWFeetToMeters); PAWLocationAccuracy distanceForCell = [self distanceForCell:indexPath]; if (abs(distanceForCell - filterDistanceInFeet) < 0.001 ) { cell.accessoryType = UITableViewCellAccessoryCheckmark; } else { cell.accessoryType = UITableViewCellAccessoryNone; } return cell; } else if (indexPath.section == kPAWSettingsTableViewMaptype){ UITableViewCell *cell = [aTableView dequeueReusableCellWithIdentifier:identifier]; if ( cell == nil ) { cell = [[UITableViewCell alloc] initWithStyle:UITableViewCellStyleValue2 reuseIdentifier:identifier]; } // Configure the cell. cell.textLabel.text = [self maptypeLabelForCell:indexPath]; PAWLocationAccuracy filterDistanceInFeet = self.filterDistance * ( 1 / kPAWFeetToMeters); PAWLocationAccuracy distanceForCell = [self distanceForCell:indexPath]; if (abs(distanceForCell - filterDistanceInFeet) < 0.001 ) { cell.accessoryType = UITableViewCellAccessoryCheckmark; } else { cell.accessoryType = UITableViewCellAccessoryNone; } return cell; } else { return nil; } }

现在我发现了以下的错误

  1. 您不保存为地图typesselect了哪个单元格。
  2. 你如何勾选你的单元格的方式是不正确的。
  3. 在switch中，你不必在return语句之后使用break
  4. case kPAWSettingsTableViewNumberOfSections:你应该返回kPAWSettingsTableViewNumberOfSections

前两个缺陷导致许多样板代码。 我认为你应该存储NSIndexPath的每个部分被选为额外的@property 。 而不是取消所有检查和检查点击，你可以在tableView:didSelectRowAtIndexPath: ::

  1. 确定应该select哪一个。
  2. 存储您的selectedIndexPath本地旧值。
  3. 将selectedIndexPath属性更改为新的。
  4. 重新加载这两行。

然后你必须添加tableView:cellForRowAtIndexPath:下面的代码： 

 if (indexPath.row == self.selectedIndexPath.row && indexPath.section == self.selectedIndexPath.section) { // Change to checkmark. } else { // Change to not checked. }

我在自己的项目中使用了非常类似于checkmark单元格的方法。 我希望下面的代码也可以帮助你理解我的方法来解决你的问题： 

 - (UITableViewCell *)tableView:(UITableView *)tableView cellForRowAtIndexPath:(NSIndexPath *)indexPath { if (/*condition*/) { [...] } else if (/*checkmark section*/) { UITableViewCell *cell = [tableView dequeueReusableCellWithIdentifier:CheckmarkCellId forIndexPath:indexPath]; cell.textLabel.text = [self labelForRow:indexPath.row]; cell.accessoryType = (indexPath.row == [self defaultAgglomerationIndex]) ? UITableViewCellAccessoryCheckmark : UITableViewCellAccessoryNone; cell.imageView.image = (indexPath.row == [self selectedAgglomerationIndex]) ? [UIImage imageNamed:@"icoMap"] : [UIImage imageNamed:@"region"]; return cell; } else if (/*Another condition */) { [...] } return nil; }

并在tableView:didSelectRowAtIndexPath:代码tableView:didSelectRowAtIndexPath:我重新加载整个部分） 

 self.selectedIndex = indexPath; NSIndexSet *set = [NSIndexSet indexSetWithIndex:indexPath.section]; [self.tableView reloadSections:set withRowAnimation:UITableViewRowAnimationNone];

试试这个，对我来说工作得很好：

– variables： 

 @property NSInteger checkedCellRow; @property NSInteger checkedCellSection;

-function： 

 - (void)tableView:(UITableView *)tableView willDisplayCell:(UITableViewCell *)cell forRowAtIndexPath:(NSIndexPath *)indexPath { if (checkedCellSection == indexPath.section) { if (checkedCellRow == indexPath.row) { cell.accessoryType = UITableViewCellAccessoryCheckmark; } else { cell.accessoryType = UITableViewCellAccessoryNone; } } } - (void)tableView:(UITableView *)tableView didSelectRowAtIndexPath:(NSIndexPath *)indexPath { checkedCellRow = indexPath.row; checkedCellSection = indexPath.section; [myTable reloadData]; }
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