我有两个意见。在第一课中,我有自定义单元格的表格,在那里重复使用单元格三次。我想用另一个类的选定文本更新每行的表格单元格文本。我已经实现从另一个类获取文本值并进行更新。用于存储使用NSDictionary
的每个行值。这样我可以获取字典值并在我的cellforrowatindexpath
中更新以更新单元格文本值。我的代码,字典每次都得到分配
A类 - 目标C:
- (UITableViewCell *)tableView:(UITableView *)tableView cellForRowAtIndexPath:(NSIndexPath *)indexPath {
static NSString *cellIdentifier = @"challengeTableCell";
cell = (EnrollmentChallengeTableViewCell *)[tableView dequeueReusableCellWithIdentifier:cellIdentifier];
if (cell == nil) {
cell = [[EnrollmentChallengeTableViewCell alloc] initWithStyle:UITableViewCellStyleDefault reuseIdentifier:cellIdentifier];
}
cell.answerTextfield.delegate = self;
if (indexPath.row == 0) {
cell.questionTitleLabel.text = @"Challenge Question 1";
cell.questionLabel.tag = 100;
cell.questionLabel.textColor = [UIColor blackColor];
NSString *user1 = [myDict objectForKey:@"firstQuestion"];
NSLog(@"firstquestion: %@",user1);
}
else if (indexPath.row == 1) {
cell.questionTitleLabel.text = @"Challenge Question 2";
cell.questionLabel.tag = 101;
NSString *user2 = [myDict objectForKey:@"secondQuestion"];
NSLog(@"secondQuestion: %@",user2);
}
else {
cell.questionTitleLabel.text = @"Challenge Question 3";
cell.questionLabel.tag = 102;
NSString *user3 = [myDict objectForKey:@"thirdQuestion"];
NSLog(@"thirdQuestion: %@",user3);
}
if (cell.questionLabel.tag == 100 || cell.questionLabel.tag == 101 || cell.questionLabel.tag == 102) {
UITapGestureRecognizer* gesture = [[UITapGestureRecognizer alloc] initWithTarget:self action:@selector(selectQuestion:)];
[cell.questionLabel setUserInteractionEnabled:YES];
[cell.questionLabel addGestureRecognizer:gesture];
}
return cell;
}
-(void)selectQuestion:(UITapGestureRecognizer *) sender
{
CGPoint touchLocation = [sender locationOfTouch:0 inView:challengeQuestionsTable];
newIndexPath = [challengeQuestionsTable indexPathForRowAtPoint:touchLocation];
selectQuestionVC = [EnrollmentSelectQuestionViewController instantiate];
selectQuestionVC.questionDelegate = self;
[self presentViewController:selectQuestionVC animated:YES completion:nil];
}
#pragma mark - Table Selection Delegate
-(void)valueChanged:(NSString *)questionString {
//[challengeQuestionsTable reloadRowsAtIndexPaths:[NSArray arrayWithObject:newIndexPath] withRowAnimation:UITableViewRowAnimationNone];
passedValue = questionString;
NSLog(@"questionvalue: %@",passedValue);
NSLog(@"mydict: %lu",(unsigned long)[myDict count]);
cell = [challengeQuestionsTable cellForRowAtIndexPath:newIndexPath];
NSLog(@"you have selected index: %ld", (long)newIndexPath.row);
[[NSUserDefaults standardUserDefaults] setInteger:newIndexPath.row forKey:@"SelectedIndex"];
[[NSUserDefaults standardUserDefaults] synchronize];
// NSInteger numberOfRows = [challengeQuestionsTable numberOfRowsInSection:[indexPath section]];
NSLog(@"indexpath row: %ld",newIndexPath.row);
if (newIndexPath.row == 0) {
[myDict setValue:passedValue forKey:@"firstQuestion"];
} else if (newIndexPath.row == 1) {
[myDict setValue:passedValue forKey:@"secondQuestion"];
} else {
[myDict setValue:passedValue forKey:@"thirdQuestion"];
}
NSLog(@"mydict: %@",myDict);
NSLog(@"1st: %@",[myDict objectForKey:@"firstQuestion"]);
NSLog(@"2nd: %@",[myDict objectForKey:@"secondQuestion"]);
NSLog(@"3rd: %@",[myDict objectForKey:@"thirdQuestion"]);
}
B类 - SWIFT:
var questionDelegate: SelectedQuestionDelegate?
func tableView(_ tableView: UITableView, didSelectRowAt indexPath: IndexPath) {
tableView.deselectRow(at: indexPath, animated: true)
print("selected index :",indexPath.row)
let selectedCell = tableView.cellForRow(at: indexPath)
print("did select and the text is \(selectedCell?.textLabel?.text)")
let storyboard = UIStoryboard(name: "EnrollmentChallengeQuestions", bundle: nil)
challengeVC = storyboard.instantiateViewController(withIdentifier: "ChallengeQuestions") as! EnrollmentChallengeQuestionsViewController
challengeVC.passedValue = selectedCell?.textLabel?.text
print("text label value: ", challengeVC.passedValue)
questionDelegate?.valueChanged(challengeVC.passedValue)
self.present(challengeVC, animated: true , completion: nil)
}
在这里,在ValueChanged
功能,我的字典在时刻仅保持一个值。我想要把第一行的第一个问题,第二行的第二个问题和第三个问题同时进行。我的字典每次都会刷新。还试图分配我的字典在viewdidload
& viewwillappear
。所有方法从另一个类来的时候再次被调用。如何解决这个问题?
什么是你的两个控制器之间的导航? 你的两个控制器中的哪一个持有答案,哪一个包含答案? 为什么你将Swift和Objective C混合? – Ocunidee