大家好，我正在实施聊天Messenger。我面临一个奇怪的情况。我有一个自定义的tableview单元格，当我正常滚动时，它可以正常工作。但如果我像一个疯狂的男人一样快速滚动，用户的形象会变得混杂。我无法预先知道任何帮助研究员和thx的原因
- (UITableViewCell *)tableView:(UITableView *)tableView cellForRowAtIndexPath:(NSIndexPath *)indexPath
{
UIColor *rung;
if (indexPath.row%2 == 0) {
// 0.662745 0.662745 0.662745
rung=[UIColor colorWithRed:0.802745 green:0.802745 blue:0.802745 alpha:1];
color=NO;
}
else {
// 0.972549 0.972549 1
//0.411765 0.411765 0.411765
rung=[UIColor colorWithRed:0.862745 green:0.862745 blue:0.862745 alpha:1];
color=YES;
}
//static NSString *MyIdentifier = @"Identifier";
NSLog(@"====IndexPath is %d",indexPath.row);
ChatSlideDC *slide = [[HMMainManager getSharedInstance].currentMeeting.resumedChatMessages objectAtIndex:indexPath.section];
ChatMessageDC *message;
message = [[slide ChatMessageArray]objectAtIndex:indexPath.row];
NSLog(@"====Message Type is %@",message.MessageType);
NSLog(@"%@",message.Message);
if ([message.MessageType isEqualToString: @"0"] || [message.MessageType isEqualToString:@"1"]) {
ChatCustomCell * cell = (ChatCustomCell *) [tableView dequeueReusableCellWithIdentifier:@"ChatCustomCell"];
if (cell == nil) {
NSArray *nib = [[NSBundle mainBundle] loadNibNamed:@"ChatCustomCell" owner:self options:nil];
cell = (ChatCustomCell*)[nib objectAtIndex:0];
}
// cell.backgroundImage.backgroundColor=rung;
UIView *view = [[UIView alloc] initWithFrame:CGRectZero];
view.backgroundColor = rung;
view.opaque = YES;
cell.backgroundView = view;
[view release];
//cell.backgroundColor=rung;
cell.lblSaid.text =@"Said";
cell.lblName.text =message.SenderName;
cell.lblText.text =message.Message;
NSLog(@"manager strID: %@ chat cell attendeeID %@",[HMMainManager getSharedInstance].currentMeeting.strAttendeeID,message.AttendeeID);
NSLog(@"%@ == %@",message.AttendeeID,[HMMainManager getSharedInstance].currentMeeting.strAttendeeID);
if ([message.AttendeeID isEqualToString:[HMMainManager getSharedInstance].currentMeeting.strAttendeeID]) {
cell.imgThumbUserPic.image = [MainManager getSharedInstance].userManager.userImage;
}
cell.selectionStyle = UITableViewCellEditingStyleNone;
// [message release];
return cell;
}
if ([message.MessageType isEqualToString:@"2"] || [message.MessageType isEqualToString:@"3"] ) {
if ([message.MessageType isEqualToString:@"3"] || (message.question && [message.question length]>0)) {
//show asnwer cell
AnswerCustomCell * cell = (AnswerCustomCell *) [tableView dequeueReusableCellWithIdentifier:@"AnswerCustomCell"];
if (cell == nil)
{
NSArray *nib = [[NSBundle mainBundle] loadNibNamed:@"AnswerCustomCell" owner:self options:nil];
cell = (AnswerCustomCell*)[nib objectAtIndex:0];
}
UIView *view = [[UIView alloc] initWithFrame:CGRectZero];
view.backgroundColor = rung;
view.opaque = YES;
cell.backgroundView = view;
[view release];
//answer here goes
cell.answerdBy.text = message.SenderName;
cell.answerText.text = message.Message;
[cell.answerText flashScrollIndicators];
//question
cell.questionedBy.text = message.QuestionBy;
cell.questionText.text = message.question;
[cell.questionText flashScrollIndicators];
NSLog(@"%@",message.MessageId);
NSLog(@"manager strID: %@ ans cell attendeeID %@",[HMMainManager getSharedInstance].currentMeeting.strAttendeeID,message.AttendeeID);
if ([message.AttendeeID isEqualToString:[HMMainManager getSharedInstance].currentMeeting.strAttendeeID]) {
// if ([message.SenderName isEqualToString:compName] ) {
NSLog(@"----------:: %@ == %@ and message:%@",message.AttendeeID ,[HMMainManager getSharedInstance].currentMeeting.strAttendeeID,message.Message);
cell.ansPic.image = [MainManager getSharedInstance].userManager.userImage;
// }
}
NSLog(@"manager strID: %@ ans cell attendeeID %@",[HMMainManager getSharedInstance].currentMeeting.strAttendeeID,message.QuestionID);
// NSString *qustWalaID=[[HMMainManager getSharedInstance].currentMeeting.questionDict objectForKey:message.QuestionID];
// NSLog(@"%@",questionDict);
if ([message.questionAttendeeID isEqualToString:[HMMainManager getSharedInstance].currentMeeting.strAttendeeID])
{
// if ([message.QuestionBy isEqualToString:compName] ) {
NSLog(@"------------:: %@ == %@ and message:%@",message.questionAttendeeID ,[HMMainManager getSharedInstance].currentMeeting.strAttendeeID,message.Message);
cell.quePic.image = [MainManager getSharedInstance].userManager.userImage;
// }
}
// tempChatMessageDC=message;
// tempAnswerCustomCell=cell;
// [message release];
return cell;
}
else {
//show question cell
QuestionCustomCell * cell = (QuestionCustomCell *) [tableView dequeueReusableCellWithIdentifier:@"QuestionCustomCell"];
if (cell == nil) {
NSArray *nib = [[NSBundle mainBundle] loadNibNamed:@"QuestionCustomCell" owner:self options:nil];
cell = (QuestionCustomCell*)[nib objectAtIndex:0];
}
UIView *view = [[UIView alloc] initWithFrame:CGRectZero];
view.backgroundColor = rung;
view.opaque = YES;
cell.backgroundView = view;
[view release];
cell.lblSaid.text =@"Asked";
cell.lblName.text =message.SenderName;
NSLog(@"Question is %@", message.question);
cell.lblText.text =message.Message;
[cell.lblText flashScrollIndicators];
// cell.lblAnswerQuestion.hidden = NO;
if (!message.answered) {
cell.lblAnswerQuestion.hidden = NO;
cell.userInteractionEnabled = YES;
}else {
cell.lblAnswerQuestion.hidden = YES;
cell.userInteractionEnabled = NO;
}
// cell.userInteractionEnabled = YES;
[[HMMainManager getSharedInstance].currentMeeting.questionDict setObject:message.AttendeeID forKey:message.MessageId];
NSMutableDictionary *tmpDoct=[HMMainManager getSharedInstance].currentMeeting.questionDict ;
// [questionDict setObject:message.AttendeeID forKey:message.MessageId];
NSLog(@"%@",tmpDoct );
NSLog(@"manager strID: %@ ques cell attendeeID %@",[HMMainManager getSharedInstance].currentMeeting.strAttendeeID,message.AttendeeID);
if ([message.AttendeeID isEqualToString:[HMMainManager getSharedInstance].currentMeeting.strAttendeeID]) {
cell.imgThumbUserPic.image = [MainManager getSharedInstance].userManager.userImage;
}
cell.tvAnswer.delegate = self;
NSMutableString* finalSec = [NSString stringWithFormat:@"%d",indexPath.section];
for (NSInteger x=0; x<3; x++) {
if (finalSec.length <3) {
finalSec = [NSString stringWithFormat:@"0%@",finalSec];
}
}
NSLog(@"%@", finalSec);
NSString* tag = [NSString stringWithFormat:@"%d%@",indexPath.row+1, finalSec];
NSLog(@"tag value %d",[tag intValue]);
cell.btnAnswer.tag = [tag intValue];//indexPath.row + 1000 + indexPath.section;
cell.tvAnswer.tag = [tag intValue];
cell.selectionStyle = UITableViewCellEditingStyleNone;
[cell.btnAnswer addTarget:self action:@selector(answerButtonPressed:) forControlEvents:UIControlEventTouchUpInside];
// [message release];
return cell;
}
}
// [message release];
return nil;
}
答案 0 :(得分：2)
您应该正确使用单元格的重用。你有代码片段：
if ([message.AttendeeID isEqualToString:[HMMainManager getSharedInstance].currentMeeting.strAttendeeID]) {
cell.imgThumbUserPic.image = [MainManager getSharedInstance].userManager.userImage;
}
您没有处理其他变体。您应该在任何情况下设置用户图片
if ([message.AttendeeID isEqualToString:[HMMainManager getSharedInstance].currentMeeting.strAttendeeID]) {
cell.imgThumbUserPic.image = [MainManager getSharedInstance].userManager.userImage;
} else {
cell.imgThumbUserPic.image = nil; //or set it with another image
}