我遇到的问题是没有调用didselectrowatindexpath。 我的tableview在viewdidload中设置如下:
- (void)viewDidLoad
{
//[super viewDidLoad];
self.tableView.delegate = self;
self.tableView.dataSource = self;
[self.tableView reloadData];
self.detailViewController = (klViewController *)[[self.splitViewController.viewControllers lastObject] topViewController];
}
现在我的cellForRowAtIndexPath被调用,我正在重复使用单元格如下:
- (UITableViewCell *)tableView:(UITableView *)tableView cellForRowAtIndexPath:(NSIndexPath *)indexPath
{
static NSString *CellIdentifier = @"menuSelection1";
UITableViewCell *cell = [tableView dequeueReusableCellWithIdentifier:CellIdentifier];
if (cell == nil) {
cell = [[UITableViewCell alloc] initWithStyle:UITableViewCellStyleDefault reuseIdentifier:CellIdentifier];
}
AmbassadorInfoData * data = [self.LoadMenuItems objectAtIndex:indexPath.row];
cell.textLabel.text = data.treeName;
return cell;
}
我已经检查了其他答案,并且大多数人说可能会使用didDeselectRowAtIndexPath。但这不是这种情况。 现在我的问题是在我的拆分视图控制器中,每当我选择任何选项时,相应的详细信息视图都不会显示并且为空白。我没有调用rootview控制器(klViewController)中的任何方法。这可能是什么原因? 以下是与UITableView相关的所有方法。它与viewDidLoad
中的同一个类实现#pragma mark - Table view data source
- (NSInteger)numberOfSectionsInTableView:(UITableView *)tableView
{
// Return the number of sections.
return 1;
}
- (NSInteger)tableView:(UITableView *)tableView numberOfRowsInSection:(NSInteger)section
{
// Return the number of rows in the section.
return [self.LoadMenuItems count];
}
- (UITableViewCell *)tableView:(UITableView *)tableView cellForRowAtIndexPath:(NSIndexPath *)indexPath
{
static NSString *CellIdentifier = @"menuSelection1";
UITableViewCell *cell = [tableView dequeueReusableCellWithIdentifier:CellIdentifier];
if (cell == nil) {
cell = [[UITableViewCell alloc] initWithStyle:UITableViewCellStyleDefault reuseIdentifier:CellIdentifier];
}
AmbassadorInfoData * data = [self.LoadMenuItems objectAtIndex:indexPath.row];
cell.textLabel.text = data.treeName;
return cell;
}
-(NSArray *)LoadMenuItems
{
NSMutableArray * menuData = [[NSMutableArray alloc] initWithCapacity:5];
AmbassadorInfoData * data = [[AmbassadorInfoData alloc] init];
data.treeName = @"Ambassador Info";
data.treeDescription = @"This is temp data.";
NSString * file = [[NSBundle mainBundle] pathForResource:@"oak" ofType:@"jpg"];
data.treePhoto = [UIImage imageWithContentsOfFile:file];
[menuData addObject:data];
data=nil;
data = [[AmbassadorInfoData alloc] init];
data.treeName = @"AmbassadorInternalList";
data.treeDescription = @"This is temp data.).";
file = [[NSBundle mainBundle] pathForResource:@"DouglasFir" ofType:@"jpg"];
data.treePhoto = [UIImage imageWithContentsOfFile:file];
[menuData addObject:data];
data=nil;
data = [[AmbassadorInfoData alloc] init];
data.treeName = @"Text 3";
data.treeDescription = @"This is temp data.";
file = [[NSBundle mainBundle] pathForResource:@"SugarMaple" ofType:@"jpg"];
data.treePhoto = [UIImage imageWithContentsOfFile:file];
[menuData addObject:data];
data=nil;
data = [[AmbassadorInfoData alloc] init];
data.treeName = @"Text 4";
data.treeDescription = @"This is temp data.";
file = [[NSBundle mainBundle] pathForResource:@"RedMaple" ofType:@"jpg"];
data.treePhoto = [UIImage imageWithContentsOfFile:file];
[menuData addObject:data];
data=nil;
data = [[AmbassadorInfoData alloc] init];
data.treeName = @"Text 5";
data.treeDescription = @"This is temp data.";
file = [[NSBundle mainBundle] pathForResource:@"Pine" ofType:@"jpg"];
data.treePhoto = [UIImage imageWithContentsOfFile:file];
[menuData addObject:data];
menuItems = [[NSArray alloc] initWithArray:(NSArray *)menuData];
data=nil;
return menuItems;
}
#pragma mark - Table view delegate
- (void)tableView:(UITableView *)tableView didSelectRowAtIndexPath:(NSIndexPath *)indexPath
{
AmbassadorInfoData * selectedItem =(AmbassadorInfoData *)[self.menuItems objectAtIndex:[self.tableView indexPathForSelectedRow].row];
detailObject = selectedItem;
[detailViewController setDetailItem:detailObject];
}
@end
答案 0 :(得分:0)
尝试以下修改:
- (void)tableView:(UITableView *)tableView didSelectRowAtIndexPath:(NSIndexPath *)indexPath
{
NSLog(@"TableView methods are called! problem is getting AmbassadorInfoData object")
AmbassadorInfoData * selectedItem =(AmbassadorInfoData *)[self.menuItems objectAtIndex:indexPath.row];
if (!selectedItem) NSLog(@"Unable to get Ambassador object, check your menuItems");
[self.detailViewController setDetailItem:selectedItem]; //notice "self."
}
同样,取消注释[super viewDidLoad];
编辑:
看来你正在使用你不理解的代码,在这种情况下我建议学习一些基础知识....这里有一个great site,帮助我理解了很多次
这是Apple的指南:Table View Programming Guide
答案 1 :(得分:0)
由于您使用LoadMenuItems的方式,可能是您的程序停留在长时间运行的操作中。每次调用numberOfRowsInSection和cellForRowAtIndexPath时,都会重新创建整个数组 - 这很糟糕。您应该在viewDidLoad中调用LoadMenuItems一次,并且在创建该数组后,使用它,而不是在需要获取数据时调用LoadMenuItems。我不知道这是不是导致你出现问题的原因,但是你一定要修好它,看看它是否有所作为。