b3r*_*rge 12 xcode objective-c storyboard uiviewcontroller tableview
在故事板中我向视图控制器添加了一个表视图,我将ctrl拖动到ViewController并连接到"delegate"和"datasource".在我添加的(.h)文件中,<UITableViewDataSource,UITableViewDelegate>但是当我运行应用程序时,我只收到SIGABRT错误(?)并且应用程序崩溃了.我该怎么办?
Lev*_*dız 20
到目前为止,您只需要在实现文件中实现UITableViewDataSource和UITableViewDelegate.
所需功能如下;
- (NSInteger)numberOfSectionsInTableView:(UITableView *)tableView {
return [regions count];
}
- (NSInteger)tableView:(UITableView *)tableView numberOfRowsInSection:(NSInteger)section {
// Number of rows is the number of time zones in the region for the specified section.
Region *region = [regions objectAtIndex:section];
return [region.timeZoneWrappers count];
}
- (NSString *)tableView:(UITableView *)tableView titleForHeaderInSection:(NSInteger)section {
// The header for the section is the region name -- get this from the region at the section index.
Region *region = [regions objectAtIndex:section];
return [region name];
}
- (UITableViewCell *)tableView:(UITableView *)tableView cellForRowAtIndexPath:(NSIndexPath *)indexPath {
static NSString *MyIdentifier = @"MyReuseIdentifier";
UITableViewCell *cell = [tableView dequeueReusableCellWithIdentifier:MyIdentifier];
if (cell == nil) {
cell = [[[UITableViewCell alloc] initWithStyle:UITableViewCellStyleDefault reuseIdentifier:MyIdentifier]];
}
Region *region = [regions objectAtIndex:indexPath.section];
TimeZoneWrapper *timeZoneWrapper = [region.timeZoneWrappers objectAtIndex:indexPath.row];
cell.textLabel.text = timeZoneWrapper.localeName;
return cell;
}
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