dynamicUITableView在静态UITableViewCell中

以下设置会导致麻烦:

在我的故事板中,我有一个标准的表格视图控制器,包含一个表格视图,其中有三个静态单元作为内容。 其中一个单元格包含另一个带有dynamic内容的表格视图和一个原型单元格。 这两个表视图的委托和数据源被设置为相同的表视图控制器。 在委托和数据源方法中,我确定哪个tableview调用方法并正确处理响应。 但是,如果dynamic表视图包含多个元素,我得到一个NSRangeException[__NSArrayI objectAtIndex:]: index 1 beyond bounds [0 .. 0] 。 我无法追查下来,因为这个调用堆栈里面没有任何东西可以让我看起来很熟悉。 我怀疑我的数据是中断的,但是在用NSLog消息污染后,似乎并不是这样,我仍然迷失了方向。

这是我的代码:

 @interface CartViewController : UITableViewController @property (nonatomic, strong) IBOutlet UITableView* cartTableView; @property (nonatomic, strong) IBOutlet UILabel* lblTotalPrice; @property (nonatomic, strong) IBOutlet UITableViewCell* cellProductList; @property (nonatomic, strong) IBOutlet UITableViewCell* cellTotalPrice; @property (nonatomic, strong) IBOutlet UITableViewCell* cellProceedToCheckout; @end @implementation CartViewController @synthesize cartTableView; @synthesize lblTotalPrice; @synthesize cellProductList; @synthesize cellTotalPrice; @synthesize cellProceedToCheckout; // other methods ... #pragma mark - View lifecycle - (void)viewDidLoad { [super viewDidLoad]; [[cartTableView layer] setCornerRadius:10]; [cartTableView setTableFooterView:[[UIView alloc] initWithFrame:CGRectZero]]; [cartTableView setClipsToBounds:YES]; } - (void)viewWillAppear:(BOOL)animated { [cartTableView reloadData]; lblTotalPrice.text = [NSString stringWithFormat:@"%.2f €", [[DataStorage instance] shoppingCartTotalPrice]]; [super viewWillAppear:animated]; } #pragma mark - Table view data source - (NSInteger)numberOfSectionsInTableView:(UITableView *)tableView { NSString* tableName = @"unknown"; if(tableView == cartTableView) tableName = @"dynamic"; if(tableView == self.tableView) tableName = @"static"; int sections = 0; if (tableView == self.tableView) sections = 3; if (tableView == cartTableView) sections = 1; NSLog(@"%@ sections %d", tableName, sections); return sections; } - (NSInteger)tableView:(UITableView *)tableView numberOfRowsInSection:(NSInteger)section { NSString* tableName = @"unknown"; if(tableView == cartTableView) tableName = @"dynamic"; if(tableView == self.tableView) tableName = @"static"; int rows = 0; if (tableView == self.tableView && section < 3) rows = 1; if (tableView == cartTableView && section == 0) rows = [[DataStorage instance] shoppingCartItemCount]; NSLog(@"%@ rows %d", tableName, rows); return rows; } - (CGFloat)tableView:(UITableView *)tableView heightForRowAtIndexPath:(NSIndexPath *)indexPath { float height = 44; if (tableView == self.tableView) { if(indexPath.section == 0) height = UIInterfaceOrientationIsLandscape(self.interfaceOrientation) ? kCellProductListHeightLandscape : kCellProductListHeightPortrait; } else { height = kCartItemCellHeight; } return height; } - (UITableViewCell *)tableView:(UITableView *)tableView cellForRowAtIndexPath:(NSIndexPath *)indexPath { UITableViewCell* cell = nil; NSString* tableName = @"unknown"; if(tableView == cartTableView) tableName = @"dynamic"; if(tableView == self.tableView) tableName = @"static"; NSLog(@"%@ indexpath row %d section %d", tableName, indexPath.row, indexPath.section); if(tableView == cartTableView && indexPath.section == 0) { ProductDefaultCell* cartItemCell = [tableView dequeueReusableCellWithIdentifier:kCellIdentifier]; if (cartItemCell == nil) { cartItemCell = [[ProductDefaultCell alloc] initWithStyle:UITableViewCellStyleDefault reuseIdentifier:kCellIdentifier]; } DataStorage* dataStorage = [DataStorage instance]; ProductEntity* product = [dataStorage productFromCartAtIndex:indexPath.row]; // set up cell data from product ... cell = cartItemCell; } else { switch (indexPath.section) { case 0: cell = cellProductList; break; case 1: cell = cellTotalPrice; break; case 2: cell = cellProceedToCheckout; break; default: break; } } NSLog(@"%@ %@", tableName, cell == nil ? @"error" : @"ok"); return cell; } #pragma mark - Table view delegate - (void)tableView:(UITableView *)tableView willDisplayCell:(UITableViewCell *)cell forRowAtIndexPath:(NSIndexPath *)indexPath { NSString* tableName = @"unknown"; if(tableView == cartTableView) tableName = @"dynamic"; if(tableView == self.tableView) tableName = @"static"; NSLog(@"%@ display row %d section %d", tableName, indexPath.row, indexPath.section); } 

这里是控制台输出:

 2012-04-12 09:58:51.842 MyApp[363:fb03] dynamic sections 1 2012-04-12 09:58:51.856 MyApp[363:fb03] dynamic rows 2 2012-04-12 09:58:51.857 MyApp[363:fb03] dynamic sections 1 2012-04-12 09:58:51.857 MyApp[363:fb03] dynamic rows 2 2012-04-12 09:58:51.859 MyApp[363:fb03] static sections 3 2012-04-12 09:58:51.860 MyApp[363:fb03] static sections 3 2012-04-12 09:58:51.860 MyApp[363:fb03] static rows 1 2012-04-12 09:58:51.861 MyApp[363:fb03] static rows 1 2012-04-12 09:58:51.861 MyApp[363:fb03] static rows 1 2012-04-12 09:58:51.862 MyApp[363:fb03] static indexpath row 0 section 0 2012-04-12 09:58:51.862 MyApp[363:fb03] static ok 2012-04-12 09:58:51.863 MyApp[363:fb03] dynamic sections 1 2012-04-12 09:58:51.864 MyApp[363:fb03] dynamic rows 2 2012-04-12 09:58:51.864 MyApp[363:fb03] dynamic indexpath row 0 section 0 2012-04-12 09:58:51.978 MyApp[363:fb03] dynamic ok 2012-04-12 09:58:51.981 MyApp[363:fb03] dynamic display row 0 section 0 2012-04-12 09:58:51.991 MyApp[363:fb03] dynamic indexpath row 1 section 0 2012-04-12 09:58:52.053 MyApp[363:fb03] dynamic ok objc[363]: EXCEPTIONS: throwing 0x6b6f670 (object 0x6b6fc20, a NSException) objc[363]: EXCEPTIONS: searching through frame [ip=0x23d8678 sp=0xbfffc1a0] for exception 0x6b6f650 objc[363]: EXCEPTIONS: searching through frame [ip=0x23e2578 sp=0xbfffc1d0] for exception 0x6b6f650 objc[363]: EXCEPTIONS: searching through frame [ip=0x23e2673 sp=0xbfffd230] for exception 0x6b6f650 objc[363]: EXCEPTIONS: searching through frame [ip=0x23d8678 sp=0xbfffd4f0] for exception 0x6b6f650 objc[363]: EXCEPTIONS: searching through frame [ip=0x23e2578 sp=0xbfffd520] for exception 0x6b6f650 objc[363]: EXCEPTIONS: terminating objc[363]: EXCEPTIONS: searching through frame [ip=0x1a0deed sp=0xbfffb6a0] for exception 0x6b6f650 objc[363]: EXCEPTIONS: catch(id) objc[363]: EXCEPTIONS: unwinding through frame [ip=0x1a0deed sp=0xbfffb6a0] for exception 0x6b6f650 objc[363]: EXCEPTIONS: handling exception 0x6b6f650 at 0x1a0deff 2012-04-12 09:58:52.139 MyApp[363:fb03] *** Terminating app due to uncaught exception 'NSRangeException', reason: '*** -[__NSArrayI objectAtIndex:]: index 1 beyond bounds [0 .. 0]' *** First throw call stack: (0x187c022 0x1a0dcd6 0x1868644 0x8a7f88 0x6b41eb 0x51c008 0x51c3ce 0x507cbd 0x5166f1 0x4bfd42 0x187de42 0x23d8679 0x23e2579 0x23e2674 0x4b9967 0x670033 0x51be26 0x51c3ce 0x507cbd 0x5166f1 0x4bfd21 0x187de42 0x23d8679 0x23e2579 0x23674f7 0x23693f6 0x23f6160 0x491f30 0x185099e 0x17e7640 0x17b34c6 0x17b2d84 0x17b2c9b 0x1c7a7d8 0x1c7a88a 0x481626 0x247d 0x23e5) 

我从来没有想出是什么导致了问题,而是我subclassed我的TableViewCell(包含dynamic表的那个),让它实现必要的协议,并分配表视图委托和数据源,而不是视图控制器的静态表格视图。 这工作得很好,可能是更好的devise。

以下是一些示例代码:

 @interface CellWithTableInside : UITableViewCell <UITableViewDelegate, UITableViewDataSource> @property (nonatomic, strong) UITableView* tableViewInCell; @property (nonatomic, strong) NSArray* cellData; @end @implementation CellWithTableInside @synthesize tableViewInCell; @synthesize cellData = _cellData; - (void)setCellData:(NSArray *)cellData { _cellData = cellData; [tableViewInCell reloadData]; } - (void)setFrame:(CGRect)frame { [super setFrame:frame]; [tableViewInCell setFrame:self.bounds]; } - (id)initWithStyle:(UITableViewCellStyle)style reuseIdentifier:(NSString *)reuseIdentifier { self = [super initWithStyle:style reuseIdentifier:reuseIdentifier]; if (self) { [self setupTableView]; } return self; } - (id)initWithCoder:(NSCoder *)aDecoder { self = [super initWithCoder:aDecoder]; if (self) { [self setupTableView]; } return self; } - (void)setupTableView { tableViewInCell = [[UITableView alloc] initWithFrame:self.bounds]; [tableViewInCell setDataSource:self]; [tableViewInCell setDelegate:self]; [self addSubview:tableViewInCell]; } #pragma mark - Table view data source - (NSInteger)numberOfSectionsInTableView:(UITableView *)tableView { return 1; } - (NSInteger)tableView:(UITableView *)tableView numberOfRowsInSection:(NSInteger)section { return self.cellData.count; } - (UITableViewCell *)tableView:(UITableView *)tableView cellForRowAtIndexPath:(NSIndexPath *)indexPath { static NSString *CellIdentifier = @"NestedCell"; UITableViewCell *cell = [tableView dequeueReusableCellWithIdentifier:CellIdentifier]; if (cell == nil) { cell = [[UITableViewCell alloc] initWithStyle:UITableViewCellStyleDefault reuseIdentifier:CellIdentifier]; } cell.textLabel.text = [self.cellData objectAtIndex:indexPath.row]; return cell; } @end 

你可以像这样使用CellWithTableInside

 @interface HostingTableViewController : UITableViewController @property (nonatomic, strong) NSArray* tableData; @end @implementation HostingTableViewController @synthesize tableData; - (BOOL)shouldAutorotateToInterfaceOrientation:(UIInterfaceOrientation)toInterfaceOrientation { return YES; } - (void)viewDidLoad { tableData = [NSArray arrayWithObjects: [NSArray arrayWithObjects:@"February", nil], [NSArray arrayWithObjects:@"Apple", @"Banana", nil], [NSArray arrayWithObjects:@"John", @"Peter", @"Edward", nil], [NSArray arrayWithObjects:@"Yellow", @"Green", @"Red", @"Blue", nil], nil]; } #pragma mark - Table view data source - (NSInteger)numberOfSectionsInTableView:(UITableView *)tableView { return 1; } - (NSInteger)tableView:(UITableView *)tableView numberOfRowsInSection:(NSInteger)section { return tableData.count; } - (CGFloat)tableView:(UITableView *)tableView heightForRowAtIndexPath:(NSIndexPath *)indexPath { return 44 * [(NSArray*)[tableData objectAtIndex:indexPath.row] count]; } - (UITableViewCell *)tableView:(UITableView *)tableView cellForRowAtIndexPath:(NSIndexPath *)indexPath { static NSString *CellIdentifier = @"CellWithTableInside"; CellWithTableInside *cell = [tableView dequeueReusableCellWithIdentifier:CellIdentifier]; if (cell == nil) { cell = [[CellWithTableInside alloc] initWithStyle:UITableViewCellStyleDefault reuseIdentifier:CellIdentifier]; } [cell setCellData:[tableData objectAtIndex:indexPath.row]]; return cell; } @end 

这适用于dynamic或静态表格视图。