方位を取得(startUpdatingHeading)し、didUpdateHeadingが呼ばれたら、UITableViewCellのdetailTextLabel.textを書き換えようと思い、次のように書きました。 - (void)locationManager:(CLLocationManager *)manager didUpdateHeading:(CLHeading *)newHeading { NSString *heading = [NSString stringWithFormat:@"%.0f", newHeading.trueHeading]; UITableView *tableView = (UITableView *)self.view; UITableViewCell *headingCell = [tableView cellForRowAtIndexPa
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