我加载了一个带有数据的UITableView，请参阅下面的代码，一切都很好。但是，当我滚动表格视图时，它会崩溃。我无法找到dealloc问题的位置，并想知道一个好的和有经验的人能给我一个提示吗？
我已用完整代码更新了这篇文章，包括加载数组。
'保留'（s）被放在那里进行测试。
当我采取cellValue1的方式我没有问题，但我没有任何数据可以显示。
我收到以下消息：
[CFString isEqualToString：]：发送到解除分配的实例0x5e5ae70的消息
- (void)viewDidLoad {
[super viewDidLoad];
self.title = @"Topplista";
AccessPlayerData *readPlayerDataFunction = [AccessPlayerData new];
NSMutableArray *leaderboardArray = [[NSMutableArray alloc] initWithCapacity:0];
leaderboardArray = [readPlayerDataFunction readPlayersFileForLeaderBoard];
cellArray1 = [[NSMutableArray alloc]init];
cellArray2 = [[NSMutableArray alloc]init];
NSString *keyName = [[NSString alloc]init]; // Player name
double percentCorrectAnswers = 0; // % correct answers
double nrCorrectAnswers = 0; // # correct answers
double totalNrQuestions = 0; // # questions ever answered
nrOfPlayers = [leaderboardArray count] / 3;
keyName = [leaderboardArray objectAtIndex:3];
nrCorrectAnswers = [[leaderboardArray objectAtIndex:4]doubleValue];
totalNrQuestions = [[leaderboardArray objectAtIndex:5]doubleValue];
percentCorrectAnswers = (nrCorrectAnswers / totalNrQuestions) * 100;
int loop = 0;
int loop2 = 2;
int counter = 1;
for (int oo = 0; oo < nrOfPlayers; oo++) {
if ([[leaderboardArray objectAtIndex:loop2]intValue] > 0) {
keyName = [leaderboardArray objectAtIndex:loop];
loop++;
nrCorrectAnswers = [[leaderboardArray objectAtIndex:loop]doubleValue];
loop++;
totalNrQuestions = [[leaderboardArray objectAtIndex:loop]doubleValue];
loop++;
percentCorrectAnswers = (nrCorrectAnswers / totalNrQuestions) * 100;
[cellArray1 addObject:keyName]; // Player name
[cellArray1 addObject:[NSNumber numberWithDouble:totalNrQuestions]];
[cellArray1 addObject:[NSNumber numberWithDouble:nrCorrectAnswers]];
[cellArray1 addObject:[NSNumber numberWithDouble:percentCorrectAnswers]];
counter++;
}
else {
loop = loop + 3;
}
loop2 = loop2 + 3;
}
self.sortArray;
rowCount = [cellArray1 count];
[keyName retain];
[readPlayerDataFunction release];
[keyName release];
[leaderboardArray release];
}
- (void)sortArray {
//outputArray
NSMutableArray *dummyArray = [[NSMutableArray alloc]initWithCapacity:0];
NSMutableArray *editPlayerArray = [[NSMutableArray alloc] initWithArray:cellArray1];
NSArray *sortedArray = [[NSArray alloc]init];
int nrOfActivePlayers = [cellArray1 count] / 4;
int counteR = 2;
for (int qq = 0; qq < nrOfActivePlayers; qq++) {
[dummyArray addObject:[cellArray1 objectAtIndex:counteR]];
counteR = counteR + 4;
}
// Sort the array
sortedArray = [dummyArray sortedArrayUsingSelector:@selector(compare:)];
int rank = 0;
int roller = [editPlayerArray count] / 4;
int oldNrAnswers = 0;
NSMutableArray *finalArray = [[NSMutableArray alloc]initWithCapacity:0];
for (int qq = nrOfActivePlayers - 1; qq > -1; qq--) {
counteR = 2;
for (int rr = 0; rr < roller; rr++) {
if ([[editPlayerArray objectAtIndex:counteR]intValue] == [[sortedArray objectAtIndex:qq]intValue]) {
//=====FIX RANKING IF THERE IS MORE THAN ONE PLAYER WITH THE SAME RESULT=====//
if ([[editPlayerArray objectAtIndex:counteR]intValue] == oldNrAnswers) {
if (rank == 0) rank = 1;
}
else {
rank++;
}
[finalArray addObject:[NSNumber numberWithInt:rank]]; // Rank
[finalArray addObject:[editPlayerArray objectAtIndex:counteR - 2]]; // Player name
[finalArray addObject:[editPlayerArray objectAtIndex:counteR - 1]]; // Asked questions
[finalArray addObject:[editPlayerArray objectAtIndex:counteR]]; // Correct answers
oldNrAnswers = [[editPlayerArray objectAtIndex:counteR]intValue];
[finalArray addObject:[editPlayerArray objectAtIndex:counteR + 1]]; // % correct answers
[editPlayerArray removeObjectAtIndex:counteR - 2];
[editPlayerArray removeObjectAtIndex:counteR - 2];
[editPlayerArray removeObjectAtIndex:counteR - 2];
[editPlayerArray removeObjectAtIndex:counteR - 2];
roller = [editPlayerArray count] / 4;
break;
}
else {
counteR = counteR + 4;
}
} }
[sortedArray retain];
[cellArray1 removeAllObjects];
nrOfPlayers = [finalArray count] / 5;
counteR = 0;
NSString *cellValue1 = [[NSString alloc]init];
NSString *cellValue2 = [[NSString alloc]init];
//======FORMAT THE ARRAY INTO TWO ARRAYS FOR DEPLOYMENT=======//
for (int qq = 0; qq < nrOfPlayers; qq++) {
cellValue1 = [NSString stringWithFormat:@"%i. %@ (Antal rätt svar: %.0f)",
[[finalArray objectAtIndex:counteR]intValue],
[finalArray objectAtIndex:counteR + 1],
[[finalArray objectAtIndex:counteR + 3]doubleValue]];
cellValue2 = [NSString stringWithFormat:@"Antal frågor: %.0f : Procent rätt svar: %.1f%%",
[[finalArray objectAtIndex:counteR + 2]doubleValue],
[[finalArray objectAtIndex:counteR + 4]doubleValue]];
counteR = counteR + 5;
[cellArray1 addObject:cellValue1];
[cellArray2 addObject:cellValue2];
}
[dummyArray release];
[editPlayerArray release];
[sortedArray release];
[finalArray release];
[cellValue1 release];
[cellValue2 release];
}
- (UITableViewCell *) getCellContentView:(NSString *)cellIdentifier {
CGRect CellFrame = CGRectMake(0, 0, 300, 60);
CGRect Label1Frame = CGRectMake(10, 10, 290, 25);
CGRect Label2Frame = CGRectMake(30, 33, 270, 25);
UILabel *lblTemp;
UITableViewCell *cell = [[[UITableViewCell alloc] initWithFrame:CellFrame reuseIdentifier:cellIdentifier] autorelease];
//Initialize Label with tag 1.
lblTemp = [[UILabel alloc] initWithFrame:Label1Frame];
lblTemp.backgroundColor = [UIColor orangeColor];
[lblTemp setFont:[UIFont fontWithName:@"American Typewriter" size:16]];
lblTemp.tag = 1;
[cell.contentView addSubview:lblTemp];
[lblTemp release];
//Initialize Label with tag 2.
lblTemp = [[UILabel alloc] initWithFrame:Label2Frame];
lblTemp.backgroundColor = [UIColor orangeColor];
lblTemp.tag = 2;
[lblTemp setFont:[UIFont fontWithName:@"American Typewriter" size:13]];
lblTemp.textColor = [UIColor whiteColor];
[cell.contentView addSubview:lblTemp];
[lblTemp release];
return cell;
}
- (UITableViewCell *)tableView:(UITableView *)tableView cellForRowAtIndexPath:(NSIndexPath *)indexPath {
static NSString *CellIdentifier = @"Cell";
tableView.backgroundColor = [UIColor orangeColor];
UITableViewCell *cell = [tableView dequeueReusableCellWithIdentifier:CellIdentifier];
if(cell == nil)
cell = [self getCellContentView:CellIdentifier];
UILabel *lblTemp1 = (UILabel *)[cell viewWithTag:1];
UILabel *lblTemp2 = (UILabel *)[cell viewWithTag:2];
NSLog(@" ");
NSLog(@" ");
NSLog(@" ");
NSLog(@"============");
NSLog(@"cA1: %i", [cellArray1 count]);
NSLog(@"cA2: %i", [cellArray2 count]);
NSLog(@"rowCount %i", rowCount);
NSLog(@"ixP row: %i", indexPath.row);
NSString *cellValue1 = [cellArray1 objectAtIndex:indexPath.row];
// NSString * cellValue2 = [cellArray2 objectAtIndex：indexPath.row];
[cellValue1 retain]; // for testing
// [cellValue2 retain]; //用于测试
NSLog(@"cV1: %@", cellValue1);
NSLog(@"cV2: %@", @"cellValue2");
lblTemp1.text = cellValue1;
lblTemp2.text = @"cellValue2";
return cell;
}
结果如下：
2011-03-09 21:33:23.850 FamQuiz_R0_1[842:207] cV2: cellValue2
2011-03-09 21:33:23.850 FamQuiz_R0_1[842:207]
2011-03-09 21:33:23.851 FamQuiz_R0_1[842:207]
2011-03-09 21:33:23.851 FamQuiz_R0_1[842:207]
2011-03-09 21:33:23.852 FamQuiz_R0_1[842:207] ============
2011-03-09 21:33:23.852 FamQuiz_R0_1[842:207] cA1: 7
2011-03-09 21:33:23.853 FamQuiz_R0_1[842:207] cA2: 7
2011-03-09 21:33:23.853 FamQuiz_R0_1[842:207] rowCount 7
2011-03-09 21:33:23.853 FamQuiz_R0_1[842:207] ixP row: 5
2011-03-09 21:33:23.854 FamQuiz_R0_1[842:207] cV1: 5. Barnspelare (Antal rätt svar: 2)
2011-03-09 21:33:23.854 FamQuiz_R0_1[842:207] cV2: cellValue2
2011-03-09 21:33:27.370 FamQuiz_R0_1[842:207]
2011-03-09 21:33:27.371 FamQuiz_R0_1[842:207]
2011-03-09 21:33:27.371 FamQuiz_R0_1[842:207]
2011-03-09 21:33:27.372 FamQuiz_R0_1[842:207] ============
2011-03-09 21:33:27.373 FamQuiz_R0_1[842:207] cA1: 7
2011-03-09 21:33:27.373 FamQuiz_R0_1[842:207] cA2: 7
2011-03-09 21:33:27.374 FamQuiz_R0_1[842:207] rowCount 7
2011-03-09 21:33:27.374 FamQuiz_R0_1[842:207] ixP row: 6
2011-03-09 21:33:27.375 FamQuiz_R0_1[842:207] *** -[CFString retain]: message sent to deallocated instance 0x5b446a0
答案 0 :(得分：1)
您不应该发布cellValue1 release和cellValue2。通过致电objectAtIndex:来获取它们并不会保留它们。
答案 1 :(得分：0)
这是一个想法 - 也许错误就在这里。
UILabel *lblTemp1 = (UILabel *)[cell viewWithTag:1];
UILabel *lblTemp2 = (UILabel *)[cell viewWithTag:2];
NSString *cellValue1 = [cellArray1 objectAtIndex:indexPath.row];
NSString *cellValue2 = [cellArray2 objectAtIndex:indexPath.row];
lblTemp1.text = cellValue1;
lblTemp2.text = cellValue2;
[cellArray1 objectAtIndex：indexPath.row]或[cellArray2 objectAtIndex：indexPath.row]为空
OR
[cellArray1 objectAtIndex：indexPath.row]或[cellArray2 objectAtIndex：indexPath.row]为空。
在第一种情况下，当您尝试将值分配给null lblTemp1.txt时，程序会崩溃。 在第二种情况下，程序崩溃，因为NSString * cellValue为null，然后它尝试显示空字符串。
您应该能够使用调试器逐步完成并找出这些内容的值，并找出错误发生的位置。
鉴于您的程序最初工作然后在滚动时死亡，我想知道您绘制值的cellArray1和cellArray2实际上是否具有与您要求scrollView显示的行数一样多的数据。也许你的数据少于你在TableViewDatasource中指定的行数？
答案 2 :(得分：0)
数据在创建tableView后立即发布，因此当您滚动时，应用程序崩溃。尝试在.m文件中发布所有代码，以便人们查看问题。我确信这不在您发布的代码中。
答案 3 :(得分：0)
如何在cellArray1和cellArray2中添加数据。你可以在填充这些数组的地方发布代码吗？
可能是您过度释放要添加到cellArrays的NSStrings。