跳过所有这些信息并跳至底部的更新...
我以前处理过无法识别的选择器，但这次我无法弄清楚发生了什么。调用堆栈是不透明的，我无法找出问题的根源。我尝试过使用符号断点和异常断点。这段代码之前工作得很好......我回来继续处理这个程序，现在遇到了这个
[UITableViewSectionElement numberOfSections]: unrecognized selector sent to instance 0xa285d50
我有两个UITableViews在这个视图控制器中。其中一个连接在IB(datasource and delegate)。第二个是在代码中实例化的，其数据源/委托也指向视图控制器。我在第二个表视图上放置了 2 标签以区分它们。UITableViewTwo是添加到UIView如果我有有效的数据要显示，它将作为第一个表视图的页脚返回。再说一次，这段代码不久前运行得很好，没有任何崩溃，而且我似乎无法弄清楚为什么它现在崩溃了。我正在使用ARC。
这是一些代码：
当我检查选择器发送到的对象的地址是什么时：它确实是一个UITableViewSectionElement。为什么 H 会收到 numberOfSections 呼叫？难道不是应该的吗numberOfSectionsInTableView?
UITableView Delegate/DataSource methods
-(UITableViewCell *)tableView:(UITableView *)tableView cellForRowAtIndexPath:(NSIndexPath *)indexPath
{
if (tableView.tag == 0) {
if (indexPath.row == 0) {
PCFCustomNumberReviewsCell *cell = [self.tableViewOne dequeueReusableCellWithIdentifier:@"PCFNumberOfRatings"];
[cell.numberOfReviews setText:[NSString stringWithFormat:@"%d", numReviews.integerValue]];
[cell.numberOfReviews setFont:[PCFFontFactory droidSansFontWithSize:17]];
[cell.numberOfReviews setTextColor:[UIColor lightGrayColor]];
UIImageView *imgView = [[UIImageView alloc] initWithFrame:cell.frame];
[imgView setImage:[UIImage imageNamed:@"1slot2.png"]];
[cell setBackgroundView:imgView];
return cell;
}else if(indexPath.row == 1) {
PCFCustomReviewCell *cell = [self.tableViewOne dequeueReusableCellWithIdentifier:@"RateEasiness"];
[cell.stars setBackgroundImage:[self getImageForStars:[NSString stringWithFormat:@"%d", totalEasiness.integerValue]] forState:UIControlStateNormal];
UIImageView *imgView = [[UIImageView alloc] initWithFrame:cell.frame];
[imgView setImage:[UIImage imageNamed:@"1slot2.png"]];
[cell setBackgroundView:imgView];
return cell;
}else if(indexPath.row == 2) {
PCFCustomReviewCell *cell = [self.tableViewOne dequeueReusableCellWithIdentifier:@"RateUsefulness"];
[cell.stars setBackgroundImage:[self getImageForStars:[NSString stringWithFormat:@"%d", totalUsefulness.integerValue]] forState:UIControlStateNormal];
UIImageView *imgView = [[UIImageView alloc] initWithFrame:cell.frame];
[imgView setImage:[UIImage imageNamed:@"1slot2.png"]];
[cell setBackgroundView:imgView];
return cell;
}else if(indexPath.row == 3) {
PCFCustomReviewCell *cell = [self.tableViewOne dequeueReusableCellWithIdentifier:@"RateFunness"];
[cell.stars setBackgroundImage:[self getImageForStars:[NSString stringWithFormat:@"%d", totalFunness.integerValue]] forState:UIControlStateNormal];
UIImageView *imgView = [[UIImageView alloc] initWithFrame:cell.frame];
[imgView setImage:[UIImage imageNamed:@"1slot2.png"]];
[cell setBackgroundView:imgView];
return cell;
}else if(indexPath.row == 4) {
PCFCustomReviewCell *cell = [self.tableViewOne dequeueReusableCellWithIdentifier:@"RateInterestLevel"];
[cell.stars setBackgroundImage:[self getImageForStars:[NSString stringWithFormat:@"%d", totalInterestLevel.integerValue]] forState:UIControlStateNormal];
UIImageView *imgView = [[UIImageView alloc] initWithFrame:cell.frame];
[imgView setImage:[UIImage imageNamed:@"1slot2.png"]];
[cell setBackgroundView:imgView];
return cell;
}else if(indexPath.row == 5) {
PCFCustomReviewCell *cell = [self.tableViewOne dequeueReusableCellWithIdentifier:@"RateTexbookUse"];
[cell.stars setBackgroundImage:[self getImageForStars:[NSString stringWithFormat:@"%d", totalTextbookUse.integerValue]] forState:UIControlStateNormal];
UIImageView *imgView = [[UIImageView alloc] initWithFrame:cell.frame];
[imgView setImage:[UIImage imageNamed:@"1slot2.png"]];
[cell setBackgroundView:imgView];
return cell;
}else if(indexPath.row == 6) {
PCFCustomReviewCell *cell = [self.tableViewOne dequeueReusableCellWithIdentifier:@"RateOverall"];
[cell.stars setBackgroundImage:[self getImageForStars:[NSString stringWithFormat:@"%d", totalOverall.integerValue]] forState:UIControlStateNormal];
UIImageView *imgView = [[UIImageView alloc] initWithFrame:cell.frame];
[imgView setImage:[UIImage imageNamed:@"1slot2.png"]];
[cell setBackgroundView:imgView];
return cell;
}
}else {
PCFCustomCourseCommentCell *cell = (PCFCustomCourseCommentCell *) [self.tableViewTwo dequeueReusableCellWithIdentifier:@"PCFCourseCommentCell"];
if (cell == nil) {
NSArray *topLevelObjects = [[NSBundle mainBundle] loadNibNamed:@"PCFCustomCourseReviewCell" owner:self options:nil];
cell = [topLevelObjects objectAtIndex:0];
}
UIImageView *imgView = [[UIImageView alloc] initWithFrame:cell.frame];
[imgView setImage:[UIImage imageNamed:@"1slot2.png"]];
[cell setBackgroundView:imgView];
PCFRateModel *rateObject = [courseReviews objectAtIndex:indexPath.section];
[cell.userName setText:rateObject.username];
[cell.date setText:rateObject.date];
[cell.professor setText:rateObject.course];
[cell.comment setText:rateObject.message];
[cell.term setText:rateObject.term];
for (UIView *view in cell.contentView.subviews) {
if ([view isMemberOfClass:[UILabel class]]) {
UILabel *tempLabel = (UILabel *)view;
if ([tempLabel tag] != 0) {
[tempLabel setFont:[PCFFontFactory droidSansFontWithSize:tempLabel.tag]];
}
}
}
CGSize size = [rateObject.message sizeWithFont:[PCFFontFactory droidSansFontWithSize:11] constrainedToSize:CGSizeMake(290, 100000)];
[cell.comment setFrame:CGRectMake(cell.comment.frame.origin.x, cell.comment.frame.origin.y, size.width, size.height)];
[cell.comment setBaselineAdjustment:UIBaselineAdjustmentAlignBaselines];
[cell.comment setPreferredMaxLayoutWidth:290];
[cell.comment setLineBreakMode:NSLineBreakByWordWrapping];
[cell.starFunness setBackgroundImage:[self getImageForStars:rateObject.totalClarity] forState:UIControlStateNormal];
[cell.starEasiness setBackgroundImage:[self getImageForStars:rateObject.totalEasiness] forState:UIControlStateNormal];
[cell.starUsefulness setBackgroundImage:[self getImageForStars:rateObject.totalHelpfulness] forState:UIControlStateNormal];
[cell.starInterestLevel setBackgroundImage:[self getImageForStars:rateObject.totalInterestLevel] forState:UIControlStateNormal];
[cell.starOverall setBackgroundImage:[self getImageForStars:rateObject.totalOverall] forState:UIControlStateNormal];
[cell.starTextbookUse setBackgroundImage:[self getImageForStars:rateObject.totalTextbookUse] forState:UIControlStateNormal];
return cell;
}
}
-(NSInteger)tableView:(UITableView *)tableView numberOfRowsInSection:(NSInteger)section
{
if (tableView.tag == 0) {
if (isLoading == YES) {
return 0;
}else {
return 7;
}
}else {
if (isLoadingComments == NO && courseReviews) {
return 1;
}else {
return 0;
}
}
}
-(NSInteger)numberOfSectionsInTableView:(UITableView *)tableView
{
if (isLoading == YES) return 0;
if (tableView.tag != 0) return courseReviews.count;
return 1;
}
-(UIView *)tableView:(UITableView *)tableView viewForFooterInSection:(NSInteger)section
{
if (section == 0 && tableView.tag == 0) {
if (isLoading == YES) {
return activityIndicator;
}else if (isLoading == NO) {
if (isLoadingComments == NO && courseReviews.count > 0) {
UIView *view = [[UIView alloc] initWithFrame:CGRectMake(0, 0, 320, tableViewTwo.frame.size.height)];
[view addSubview:tableViewTwo];
return view;
}else if (isLoadingComments == YES){
UIView *subView = [[UIView alloc] initWithFrame:CGRectMake(0, 0, 320, 50)];
UIActivityIndicatorView *view = [[UIActivityIndicatorView alloc] initWithFrame:CGRectMake(145, 10, 36, 36)];
[view setActivityIndicatorViewStyle:UIActivityIndicatorViewStyleWhiteLarge];
[view setColor:[UIColor whiteColor]];
[view startAnimating];
[subView addSubview:view];
return subView;
}else if (!courseReviews) {
UIView *view = [[UIView alloc] initWithFrame:CGRectMake(0, 0, 320, 40)];
UILabel *label = [[UILabel alloc] initWithFrame:CGRectMake(0, 10, 320, 30)];
[label setTextColor:[UIColor whiteColor]];
[label setTextAlignment:NSTextAlignmentCenter];
[label setFont:[PCFFontFactory droidSansFontWithSize:22]];
[label setText:@"No Reviews"];
[label setBackgroundColor:[UIColor clearColor]];
[view addSubview:label];
return view;
}
}
}
return nil;
}
-(CGFloat)tableView:(UITableView *)tableView heightForFooterInSection:(NSInteger)section
{
if (tableView.tag == 0) {
if (isLoadingComments == NO && courseReviews.count > 0) return tableViewTwo.frame.size.height + 50;
}
return 5;
}
-(CGFloat)tableView:(UITableView *)tableView heightForRowAtIndexPath:(NSIndexPath *)indexPath
{
if (tableView.tag == 2) {
PCFRateModel *model = [courseReviews objectAtIndex:indexPath.section];
CGSize size = [model.message sizeWithFont:[PCFFontFactory droidSansFontWithSize:11] constrainedToSize:CGSizeMake(290, 100000)];
return (93 + size.height + 10);
}else {
return tableView.rowHeight;
}
}
-(UIView *)tableView:(UITableView *)tableView viewForHeaderInSection:(NSInteger)section
{
if (section == 0 && tableView.tag == 0) {
if ([PCFInAppPurchases boughtRemoveAds] == NO) {
if (adView && adView.hidden == NO) {
UIView *view = [[UIView alloc] initWithFrame:CGRectMake(0, 0, 320, 80)];
CGRect frame = adView.frame;
frame.origin.y = 0;
adView.frame = frame;
UILabel *label = [[UILabel alloc] initWithFrame:CGRectMake(10, 60, 320, 30)];
[label setNumberOfLines:0];
[label setText:classTitle];
[label setFont:[PCFFontFactory droidSansFontWithSize:14]];
[label setTextColor:[UIColor whiteColor]];
[label setBackgroundColor:[UIColor clearColor]];
[view addSubview:adView];
[view addSubview:label];
return view;
}
}else {
UILabel *label = [[UILabel alloc] initWithFrame:CGRectMake(10, 0, 320, 30)];
[label setNumberOfLines:0];
[label setText:classTitle];
[label setFont:[PCFFontFactory droidSansFontWithSize:14]];
[label setTextColor:[UIColor whiteColor]];
[label setBackgroundColor:[UIColor clearColor]];
return label;
}
}
return nil;
}
-(CGFloat)tableView:(UITableView *)tableView heightForHeaderInSection:(NSInteger)section
{
if (section == 0 & tableView.tag == 0) {
if ([PCFInAppPurchases boughtRemoveAds] == NO) {
if (adView && adView.hidden == NO) {
return 90;
}return 10;
}else {
return 30;
}
}
return 5;
}
查看Did Load（相关信息）：
tableViewTwo = [[UITableView alloc] initWithFrame:CGRectMake(0, 50, 320, self.view.bounds.size.height) style:UITableViewStyleGrouped];
[tableViewTwo setSectionFooterHeight:0.0f];
[tableViewTwo setDataSource:self];
[tableViewTwo setDelegate:self];
[tableViewTwo setTag:2];
UILabel *label = [[UILabel alloc] initWithFrame:CGRectMake(0, 10, 320, 30)];
[label setTextColor:[UIColor whiteColor]];
[label setTextAlignment:NSTextAlignmentCenter];
[label setFont:[PCFFontFactory droidSansFontWithSize:22]];
[label setText:@"User Reviews"];
[label setBackgroundColor:[UIColor clearColor]];
[tableViewTwo setTableHeaderView:label];
[tableViewTwo setRowHeight:136];
[tableViewTwo setSectionFooterHeight:.01f];
[tableViewTwo setSectionHeaderHeight:.01f];
我附上该应用程序的一些屏幕截图：
每当我单击或尝试滚动 tableviewTwo 时，我都会遇到此崩溃。
Update:
这就是我滚动第二个时显示的内容UITableView（启用所有例外）：
我的手机上有一个完美运行的版本（一个月前）..我不知道为什么现在会收到此错误。如果 Interface Builder 导致了这种情况，是否可以进行更改？我已经检查了所有的销售点并将它们包括在内。谢谢..
Update:
奇怪的是，当我在另一台笔记本电脑上克隆存储库时，它可以正常工作。我认为我正在使用的项目不知何故已损坏？我会回家进一步调查。
关于为什么这不会在我的工作笔记本电脑（类似规格）上崩溃并且在我的笔记本电脑上崩溃的任何想法。我已经在两台笔记本电脑中克隆了 git 目录，但我在这里崩溃了，但在那里却没有崩溃。我在我的笔记本电脑上运行 XCode 版本 4.6.3。
更新2：
它不再在我的工作笔记本电脑上工作......这是怎么回事？ Xcode 4.6.3 是否存在错误？我可以做些什么来进一步解决这个问题吗？为什么调用 numberOfSections ？我在任何地方都找不到有关该内容的在线文档。
更新3：
好吧，事实证明 viewForFooterInSection 选择器中的这行代码就是罪魁祸首：
UIView *view = [[UIView alloc] initWithFrame:CGRectMake(0, 0, 320, tableViewTwo.frame.size.height)];
[view addSubview:tableViewTwo];
return view;
它在设备上运行良好，但在模拟器上崩溃。当我简单地将其更改为以下内容时......它就有效了。
return tableViewTwo;
有谁知道为什么在视图中返回表视图会出错？
