我的场景是当scrollview水平移动时，它必须显示一个带有表视图的问题，并在表视图中显示一些控件。
水平移动滚动视图时，我会释放以前的表格和标签，并创建新表格和新标签。
但我的应用程序在滚动了大约20次后崩溃，即仅在设备中但在模拟器中正常工作。
我使用乐器运行app没有泄漏..
我怀疑是否有任何问题，这个iPAD第一代RAM意味着不够或任何其他问题.. 这是我的代码..
- (void)scrollViewDidEndDecelerating:(UIScrollView *)scrollView
{
@try {
cancelScroll = NO;
if (scrollEnabled) {
scrollEnabled = NO;
NSLog(@"Begin Scroll Dragging");
NSLog(@"%f -- %f",scrollView.contentOffset.x,scrollView.contentOffset.y);
if (scrollDirection == 1) {
scrollDirection = 0;
rect = mainTable.frame;
[scrollTableView scrollRectToVisible:rect animated:NO];
return;
}
else if (scrollDirection == 2) {
scrollDirection = 0;
HUDProgress.alpha=0;
pageWidth = scrollTableView.frame.size.width;
if (pageControlBeingUsed) {
page = pageControl.currentPage;
}
else {
page= floor((scrollTableView.contentOffset.x - pageWidth / 2) / pageWidth) + 1;
}
NSLog(@"%d",page);
if (page == [questionTextArray count] - 1) {
if (maxValueReached) {
rect = mainTable.frame;
[scrollTableView scrollRectToVisible:rect animated:NO];
return;
}
}
photoAlbumView.alpha = 0;
photoView.alpha = 0;
FileAddView.alpha = 0;
settingsView.alpha = 0;
refreshView.alpha = 0;
photoAlbumViewPortrait.alpha = 0;
FileAddViewPortrait.alpha = 0;
settingsViewPortrait.alpha = 0;
refreshViewPortrait.alpha = 0;
checkValueForTableView = TRUE;
if (orientation == 1 ) {
if (!expandAction) {
scrollTableView.contentSize = CGSizeMake([questionTextArray count] * 720.0, 596.0);
}
else {
scrollTableView.contentSize = CGSizeMake([questionTextArray count] * 930.0, 596.0);
}
}
else {
if (!expandAction) {
scrollTableView.contentSize = CGSizeMake([questionTextArray count] * 520.0, 680.0);
}
else {
scrollTableView.contentSize = CGSizeMake([questionTextArray count] * 720.0, 680.0);
}
}
if (page >= 0) {
if (page > tempPage) {
difference = page - tempPage;
NSLog(@"%d",difference);
NSLog(@"%f",tableXPosition);
tableXPosition = (tableXPosition + (difference * tableWidthPosition));
NSLog(@"%f",tableXPosition);
}
else if (page < tempPage){
difference = tempPage - page;
NSLog(@"%d",difference);
tableXPosition = abs ((difference * tableWidthPosition) - tableXPosition);
NSLog(@"%f",tableXPosition);
}
else {
rect = mainTable.frame;
[scrollTableView scrollRectToVisible:rect animated:NO];
}
}
if([questionTextArray count] > 1)
{
pageControl.numberOfPages = [questionTextArray count];
[pageControl addTarget:self action:@selector(changePage) forControlEvents:UIControlEventValueChanged];
if(scrollTableView != nil)
{
if (mainTable != nil) {
// mainTable.delegate = nil;
[mainTable release];
mainTable = [[UITableView alloc] initWithFrame:CGRectMake(tableXPosition , 45.0, tableWidthPosition, 565.0) style:UITableViewStyleGrouped];
}
mainTable.delegate = self;
mainTable.dataSource = self;
mainTable.scrollEnabled = YES;
mainTable.backgroundColor = [UIColor clearColor];
[mainTable reloadData];
[scrollTableView addSubview:mainTable];
}
NSLog(@"%d %d",page,previousPage);
if (page >= 0) {
if (previousPage != page) {
pageControl.currentPage= page;
}
}
if (page >= 0) {
if (previousPage != page) {
UIImageView *imgView = [[UIImageView alloc] init];
UILabel *questionTextLbl1 = [[UILabel alloc] init];
UILabel *questionNumberLbl1 = [[UILabel alloc] init];
if (orientation == 1) {
if (!expandAction) {
imgView.frame = CGRectMake(tableXPosition, 0.0, 710.0, 39.0);
questionTextLbl1.frame = CGRectMake(10.0, 2.0, 430.0, 35.0);
questionNumberLbl1.frame = CGRectMake(550.0, 2.0, 200.0, 35.0);
}
else {
imgView.frame = CGRectMake(tableXPosition, 0.0, 920.0, 39.0);
questionTextLbl1.frame = CGRectMake(50.0, 2.0, 500.0, 35.0);
questionNumberLbl1.frame = CGRectMake(800.0, 2.0, 150.0, 35.0);
compressButton = [UIButton buttonWithType:UIButtonTypeCustom];
compressButton.frame = CGRectMake(10.0, 10.0, 25.0, 25.0);
[compressButton setImage:[UIImage imageNamed:@"Drop Down small2.png"] forState:UIControlStateNormal];
[compressButton addTarget:self action:@selector(compressAction) forControlEvents:UIControlEventTouchUpInside];
}
imgView.contentMode = UIViewContentModeScaleToFill;
imgView.backgroundColor = [UIColor clearColor];
imgView.image = [UIImage imageNamed:@"Top gary header.png"];
[scrollTableView addSubview:imgView];
if (!expandAction) {
NSLog(@"expandAction");
}
else {
compressButton.backgroundColor = [UIColor clearColor];
[compressButton addTarget:self action:@selector(compressAction) forControlEvents:UIControlEventTouchUpInside];
[imgView addSubview:compressButton];
imgView.userInteractionEnabled = YES;
}
questionTextLbl1.backgroundColor = [UIColor clearColor];
questionTextLbl1.numberOfLines = 0;
questionTextLbl1.text = [NSString stringWithFormat:@"%d.%@?",page + 1,[questionTextArray objectAtIndex:page]];
NSLog(@"Question arry %@", questionTextArray);
[imgView addSubview:questionTextLbl1];
if([questionTextArray count] > 1)
{
questionNumberLbl1.text = [NSString stringWithFormat:@"Question %d/%d",page + 1,[questionTextArray count]];
}
else {
questionNumberLbl1.text = [NSString stringWithFormat:@"Question 1"];
}
questionNumberLbl1.backgroundColor = [UIColor clearColor];
questionNumberLbl1.numberOfLines = 0;
[imgView addSubview:questionNumberLbl1];
}
else {
if (!expandAction) {
imgView.frame = CGRectMake(tableXPosition, 0.0, 530.0, 38.0);
questionTextLbl1.frame = CGRectMake(10.0, 2.0, 350.0, 35.0);
questionNumberLbl1.frame = CGRectMake(380.0, 2.0, 150.0, 35.0);
}
else {
imgView.frame = CGRectMake(tableXPosition, 0.0, 720.0, 38.0);
questionTextLbl1.frame = CGRectMake(40.0, 2.0, 500.0, 35.0);
questionNumberLbl1.frame = CGRectMake(550.0, 2.0, 150.0, 35.0);
compressButton = [UIButton buttonWithType:UIButtonTypeCustom];
compressButton.frame = CGRectMake(10.0, 10.0, 25.0, 25.0);
[compressButton setImage:[UIImage imageNamed:@"Drop Down small2.png"] forState:UIControlStateNormal];
[compressButton addTarget:self action:@selector(compressAction) forControlEvents:UIControlEventTouchUpInside];
}
imgView.contentMode = UIViewContentModeScaleToFill;
imgView.backgroundColor = [UIColor clearColor];
imgView.image = [UIImage imageNamed:@"Top gary header.png"];
[scrollTableView addSubview:imgView];
if (!expandAction) {
NSLog(@"expandAction");
}
else {
[imgView addSubview:compressButton];
imgView.userInteractionEnabled = YES;
}
questionTextLbl1.backgroundColor = [UIColor clearColor];
questionTextLbl1.numberOfLines = 0;
questionTextLbl1.font = [UIFont systemFontOfSize:14.0];
questionTextLbl1.text = [NSString stringWithFormat:@"%d.%@?",page + 1,[questionTextArray objectAtIndex:page]];
NSLog(@"Question arry %@", questionTextArray);
[imgView addSubview:questionTextLbl1];
if([questionTextArray count] > 1)
{
questionNumberLbl1.text = [NSString stringWithFormat:@"Question %d/%d",page + 1,[questionTextArray count]];
}
else {
questionNumberLbl1.text = [NSString stringWithFormat:@"Question 1"];
}
questionNumberLbl1.backgroundColor = [UIColor clearColor];
questionNumberLbl1.numberOfLines = 0;
[imgView addSubview:questionNumberLbl1];
}
[mainTable reloadData];
// [scrollTableView addSubview:mainTable];
rect = mainTable.frame;
if (pageControlBeingUsed) {
[scrollTableView scrollRectToVisible:rect animated:YES];
pageControlBeingUsed = NO;
}
else {
[scrollTableView scrollRectToVisible:rect animated:NO];
}
tempPage = page;
previousPage = page;
if (page == [questionTextArray count] - 1){
maxValueReached = YES;
}
else {
maxValueReached = NO;
}
[imgView release];
[questionNumberLbl1 release];
[questionTextLbl1 release];
}
}
NSLog(@"page:%d previous page:%d temp page:%d",page,previousPage,tempPage);
}
}
}
else {
[self killScroll];
scrollDirection = 0;
}
}
@catch (NSException *exception) {
NSLog(@"Exception: %@---%@",[exception name],[exception reason]);
}
@finally {
NSLog(@"Finally block");
}
}
答案 0 :(得分：0)
我怀疑这个iPAD第一代RAM是否有任何问题意味着不够或任何其他问题。
你对记忆的直觉是正确的，IMO。你的方法很难遵循，所以我不确定，但似乎你实例化了一个视图和标签的日志，并将它们添加到你的主scrollTableView，但从来没有删除它们。这可以解释内存填满。
拿imgView，你实例化它：
UIImageView *imgView = [[UIImageView alloc] init];
将其添加到scrollTableView：
[scrollTableView addSubview:imgView];
向imgView添加几个子视图：
[imgView addSubview:questionTextLbl1];
[imgView addSubview:questionNumberLbl1];
你正确释放它：
[imgView release];
但在向imgView添加新scrollTableView之前，我无法看到您从imgView删除imgView的任何地方...所以您只需继续添加imgView scrollViewDidEndDecelerating ...
检查我说的是否属实的简单方法是将此语句添加到 NSLog(@"LOGGING NUMBER OF SUBVIEWS: %d", [scrollTableView.subviews count]);
：
- (void)scrollViewDidEndDecelerating:(UIScrollView *)scrollView
{
@try {
cancelScroll = NO;
if (scrollEnabled) {
NSLog(@"LOGGING NUMBER OF SUBVIEWS: %d", [scrollTableView.subviews count]);
...
如，
{{1}}
你会发现每次滚动时，子视图的数量都会增加。