正如标题所说：如果我选择它并将其滚动到屏幕外，我的自定义单元格数据就会消失
我的列表填充得很好，但是在 didSelectRowAtIndexPath 和滚动出屏幕之后不再显示任何数据。
在互联网上看到不同的帖子，但没有一个接近我的情况，所以我希望有人能找到答案。
下面是 cellForRowAtIndexPath 和 didSelectRowAtIndexPath 的代码。
- (UITableViewCell *)tableView:(UITableView *)tableView cellForRowAtIndexPath:(NSIndexPath *)indexPath {
/*
UITableViewCell: USE THE SAME IDENTIFIER FOR EVERY CELL IF YOU ARE NOT USING ICONS
Like This...
static NSString *CellIdentifier = @"Cell";
*/
NSString *CellIdentifier = [NSString stringWithFormat:@"cell_%i", indexPath.row];
BT_cell_menuList *cell = (BT_cell_menuList *)[tableView dequeueReusableCellWithIdentifier:CellIdentifier];
if (cell == nil) {
//init our custom cell
cell = [[[BT_cell_menuList alloc] initWithStyle:UITableViewCellStyleDefault reuseIdentifier:CellIdentifier] autorelease];
cell.accessoryType = UITableViewCellAccessoryDisclosureIndicator;
}
//this menu item
BT_item *thisMenuItemData = [self.menuItems objectAtIndex:indexPath.row];
[cell setTheMenuItemData:thisMenuItemData];
[cell setTheParentMenuScreenData:[self screenData]];
[cell configureCell];
//custom background view. Must be done here so we can retain the "round" corners if this is a round table
//this method refers to this screen's "listRowBackgroundColor" and it's position in the tap. Top and
//bottom rows may need to be rounded if this is screen uses "listStyle":"round"
[cell setBackgroundView:[BT_viewUtilities getCellBackgroundForListRow:[self screenData]:indexPath:[self.menuItems count]]];
//return
return cell;
}
- (void)tableView:(UITableView *)tableView didSelectRowAtIndexPath:(NSIndexPath *)indexPath {
[BT_debugger showIt:self:@"didSelectRowAtIndexPath"];
//get the rss
BT_rssItem *theRssItem = [self.rssItems objectAtIndex:indexPath.row];
//pass this menu item to the tapForMenuItem method
BT_item *thisMenuItem = [self.menuItems objectAtIndex:indexPath.row];
//build a BT_screen_webView to load. Give it an itemId that matches the menuItems
//loadScreenWithItemId value so we BT_viewControllManager can find it.
NSString *theDynamicScreenItemId = [thisMenuItem itemId];
BT_item *theDynamicScreenObjectToLoad = [[BT_item alloc] init];
[theDynamicScreenObjectToLoad setItemId:theDynamicScreenItemId];
[theDynamicScreenObjectToLoad setItemType:@"BT_screen_webView"];
//dictionary for menu row tapped
NSDictionary *menuDict = [NSDictionary dictionaryWithObjectsAndKeys:
theDynamicScreenItemId, @"itemId",
@"BT_menuItem", @"itemType",
[BT_strings getJsonPropertyValue:self.screenData.jsonVars:@"rssItemRowTapTransitionType":@""], @"transitionType", nil];
[thisMenuItem setJsonVars:menuDict];
//create a dictionary for the dynamic screen.
NSDictionary *dict = [NSDictionary dictionaryWithObjectsAndKeys:
theDynamicScreenItemId, @"itemId",
@"BT_screen_webView", @"itemType",
[BT_strings getJsonPropertyValue:self.screenData.jsonVars:@"navBarTitleText":@""], @"navBarTitleText",
theRssItem.linkURL, @"dataURL",
//these are the optional properties the BT_screen_webView will look for
[BT_strings getJsonPropertyValue:self.screenData.jsonVars:@"rssItemNavBarBackgroundColor":@""], @"navBarBackgroundColor",
[BT_strings getJsonPropertyValue:self.screenData.jsonVars:@"rssItemNavBarStyle":@""], @"navBarStyle",
[BT_strings getJsonPropertyValue:self.screenData.jsonVars:@"rssItemToolBarStyle":@""], @"toolBarStyle",
[BT_strings getJsonPropertyValue:self.screenData.jsonVars:@"rssItemBackButtonText":@""], @"navBarBackButtonText",
[BT_strings getJsonPropertyValue:self.screenData.jsonVars:@"rssItemBackgroundColor":@""], @"backgroundColor",
[BT_strings getJsonPropertyValue:self.screenData.jsonVars:@"rssItemShowBrowserBarBack":@"0"], @"showBrowserBarBack",
[BT_strings getJsonPropertyValue:self.screenData.jsonVars:@"rssItemShowBrowserRefresh":@"0"], @"showBrowserBarRefresh",
[BT_strings getJsonPropertyValue:self.screenData.jsonVars:@"rssItemShowBrowserBarLaunchInNativeApp":@"0"], @"showBrowserBarLaunchInNativeApp",
[BT_strings getJsonPropertyValue:self.screenData.jsonVars:@"rssItemNavBarRightButtonType":@""], @"navBarRightButtonType",
[BT_strings getJsonPropertyValue:self.screenData.jsonVars:@"rssItemNavBarRightButtonTapLoadScreenItemId":@""], @"navBarRightButtonTapLoadScreenItemId",
[BT_strings getJsonPropertyValue:self.screenData.jsonVars:@"rssItemRightButtonTapTransitionType":@""], @"navBarRightButtonTapTransitionType",
[BT_strings getJsonPropertyValue:self.screenData.jsonVars:@"rssItemHideBottomTabBarWhenScreenLoads":@""], @"hideBottomTabBarWhenScreenLoads",
[BT_strings getJsonPropertyValue:self.screenData.jsonVars:@"rssItemAudioFileName":@""], @"audioFileName",
[BT_strings getJsonPropertyValue:self.screenData.jsonVars:@"rssItemAudioFileURL":@""], @"audioFileURL",
[BT_strings getJsonPropertyValue:self.screenData.jsonVars:@"rssItemAudioStopsOnScreenExit":@"0"], @"audioStopsOnScreenExit",
[BT_strings getJsonPropertyValue:self.screenData.jsonVars:@"rssItemAudioNumberOfLoops":@"0"], @"audioNumberOfLoops",
nil];
//set the dictionary for the dynamic screen
[theDynamicScreenObjectToLoad setJsonVars:dict];
//BT_viewControllerManager will launch the next screen
[BT_viewControllerManager handleTapToLoadScreen:[self screenData]:thisMenuItem:theDynamicScreenObjectToLoad];
//clean up
[theDynamicScreenObjectToLoad release];
theDynamicScreenObjectToLoad = nil;
}
如果需要更多代码，我很乐意分享。
先谢谢了
附加信息 OKI 将在此处显示 configurecell 方法。也许有人看到我错过了什么
-(void)configureCell{
//appDelegate
ironmaiden_appDelegate *appDelegate = (ironmaiden_appDelegate *)[[UIApplication sharedApplication] delegate];
/*
cell design comes from rootApp.rootTheme OR from parentScreen's JSON data if over-ridden
Scenarios:
a) Title NO Description.
In this case, the row-height is used for the label the text is centered.
b) Title + Description.
In this case, the "listTitleHeight" is used and the the difference between this and
the row-height becomes the height of the description label
IMPORTANT: The image with be center in the image box. This means if the image is larger than
the row height it will not look right. Scaling images in lists is memory intensive so we do
not do it. This means you should only use icons / images that are "smaller than the row height"
*/
//default values
int rowHeight = 50;
int titleHeight = 50;
int descriptionHeight = 0;
int iconSize = 50;
int iconLeft = 0;
int iconPadding = 0;
int iconRadius = 0;
int titleFontSize = 20;
int descriptionFontSize = 20;
UIColor *titleFontColor = [UIColor blackColor];
UIColor *descriptionFontColor = [UIColor blackColor];
NSString *iconName = @"";
NSString *iconURL = @"";
NSString *iconScale = @"center";
NSString *applyShinyEffect = @"0";
NSString *rowSelectionStyle = @"arrow";
NSString *useWhiteIcons = @"0";
NSString *rowAccessoryType = @"";
NSString *titleText = @"";
NSString *descriptionText = @"";
////////////////////////////////////////////////////////////////////////
//properties not related to the device's size
//listTitle / description
titleText = [BT_strings getJsonPropertyValue:theMenuItemData.jsonVars:@"titleText":@""];
titleText = [BT_strings cleanUpCharacterData:titleText];
titleText = [BT_strings stripHTMLFromString:titleText];
descriptionText = [BT_strings getJsonPropertyValue:theMenuItemData.jsonVars:@"descriptionText":@""];
descriptionText = [BT_strings cleanUpCharacterData:descriptionText];
descriptionText = [BT_strings stripHTMLFromString:descriptionText];
titleFontColor = [BT_color getColorFromHexString:[BT_strings getStyleValueForScreen:theParentMenuScreenData:@"listTitleFontColor":@"#000000"]];
descriptionFontColor = [BT_color getColorFromHexString:[BT_strings getStyleValueForScreen:theParentMenuScreenData:@"listDescriptionFontColor":@"#000000"]];
rowSelectionStyle = [BT_strings getStyleValueForScreen:theParentMenuScreenData:@"listRowSelectionStyle":@"blue"];
iconScale = [BT_strings getStyleValueForScreen:theParentMenuScreenData:@"listIconScale":@"center"];
applyShinyEffect = [BT_strings getStyleValueForScreen:theParentMenuScreenData:@"listIconApplyShinyEffect":@"0"];
//icon name, radius, use rounded corners?
iconName = [BT_strings getJsonPropertyValue:theMenuItemData.jsonVars:@"iconName":@""];
iconURL = [BT_strings getJsonPropertyValue:theMenuItemData.jsonVars:@"iconURL":@""];
iconRadius = [[BT_strings getStyleValueForScreen:theParentMenuScreenData:@"listIconCornerRadius":@"0"] intValue];
useWhiteIcons = [BT_strings getStyleValueForScreen:theParentMenuScreenData:@"listUseWhiteIcons":@"0"];
//row accessory type
rowAccessoryType = [BT_strings getJsonPropertyValue:theMenuItemData.jsonVars:@"rowAccessoryType":@"arrow"];
//if the global theme or the parent screen use a "round" list type, button left changes so it's not against the edge
NSString *parentListStyle = [BT_strings getStyleValueForScreen:theParentMenuScreenData:@"listStyle":@"plain"];
if([parentListStyle isEqualToString:@"round"]){
iconLeft = -5;
iconPadding = 7;
}
//center image or scale image? When using icons that are smaller than the row height it's best to center
//when using images (usually from a URL) that are larger than the row height, use scale
if([iconScale isEqualToString:@"scale"]){
cellImageView.contentMode = UIViewContentModeScaleAspectFill;
}
//if we have an iconURL, and no iconName, figure out a name to use...
if(iconName.length < 3 && iconURL.length > 3){
iconName = [BT_strings getFileNameFromURL:iconURL];
}
////////////////////////////////////////////////////////////////////////
//properties related to the device's size
//height and size depends on device type
if([appDelegate.rootApp.rootDevice isIPad]){
//user large device settings
rowHeight = [[BT_strings getStyleValueForScreen:theParentMenuScreenData:@"listRowHeightLargeDevice":@"50"] intValue];
titleHeight = [[BT_strings getStyleValueForScreen:theParentMenuScreenData:@"listTitleHeightLargeDevice":@"30"] intValue];
titleFontSize = [[BT_strings getStyleValueForScreen:theParentMenuScreenData:@"listTitleFontSizeLargeDevice":@"20"] intValue];
descriptionFontSize = [[BT_strings getStyleValueForScreen:theParentMenuScreenData:@"listDescriptionFontSizeLargeDevice":@"15"] intValue];
iconSize = [[BT_strings getStyleValueForScreen:theParentMenuScreenData:@"listIconSizeLargeDevice":@"50"] intValue];
}else{
//user small device settings
rowHeight = [[BT_strings getStyleValueForScreen:theParentMenuScreenData:@"listRowHeightSmallDevice":@"50"] intValue];
titleHeight = [[BT_strings getStyleValueForScreen:theParentMenuScreenData:@"listTitleHeightSmallDevice":@"30"] intValue];
titleFontSize = [[BT_strings getStyleValueForScreen:theParentMenuScreenData:@"listTitleFontSizeSmallDevice":@"20"] intValue];
descriptionFontSize = [[BT_strings getStyleValueForScreen:theParentMenuScreenData:@"listDescriptionFontSizeSmallDevice":@"15"] intValue];
iconSize = [[BT_strings getStyleValueForScreen:theParentMenuScreenData:@"listIconSizeSmallDevice":@"50"] intValue];
}
//figure out heights
if(titleHeight > rowHeight){
titleHeight = rowHeight;
}
if([descriptionText length] > 0){
descriptionHeight = (rowHeight - titleHeight);
}else{
titleHeight = rowHeight;
}
//this is bound to happen! Users will enter a rowHeight that is the same as the titleHeight and
//provide a description. In this case, it won't work because the title will cover the description.
//ignore their settings in the case so they can see what they did and force them to adjust.
if(titleHeight == rowHeight && [descriptionText length] > 0){
titleHeight = (rowHeight / 2);
descriptionHeight = (rowHeight / 2);
}
//label size / position depend on whether or not we have an icon.
if([iconName length] > 1){
//are we using the white versions of icons?
if([useWhiteIcons isEqualToString:@"1"]){
iconName = [BT_imageTools getWhiteIconName:iconName];
}
//set the imageName and imageURL in the BT_item so it can find the icon, image, whatever
[self.theMenuItemData setImageName:iconName];
[self.theMenuItemData setImageURL:iconURL];
//frame for image / shine, etc
CGRect boxFrame = CGRectMake((iconLeft + iconPadding), 0, rowHeight, rowHeight);
CGRect imageFrame = CGRectMake((iconLeft + iconPadding) + 3, rowHeight / 2 - (iconSize / 2), iconSize, iconSize);
//set image frames
[imageBox setFrame:boxFrame];
[cellImageView setFrame:imageFrame];
[glossyMaskView setFrame:imageFrame];
[imageLoadingView setFrame:imageFrame];
//remove glossy mask if we don't want it
if([applyShinyEffect isEqualToString:@"0"]){
[glossyMaskView removeFromSuperview];
}
//round corners? Apply shadow?
if(iconRadius > 0){
cellImageView = [BT_viewUtilities applyRoundedCornersToImageView:cellImageView:iconRadius];
}
//text
int labelLeft = (iconSize + iconPadding + 8);
int labelWidth = self.contentView.frame.size.width - iconSize - iconPadding;
[titleLabel setFrame:CGRectMake(labelLeft, 0, labelWidth, titleHeight)];
[descriptionLabel setFrame:CGRectMake(labelLeft, titleHeight - 5, labelWidth, descriptionHeight)];
//show the image
[self showImage];
}else{
//remove image frames
[cellImageView removeFromSuperview];
[glossyMaskView removeFromSuperview];
[imageLoadingView removeFromSuperview];
//text
int labelLeft = 10 + iconPadding;
int labelWidth = self.contentView.frame.size.width - 25;
[titleLabel setFrame:CGRectMake(labelLeft, 0, labelWidth, titleHeight)];
[descriptionLabel setFrame:CGRectMake(labelLeft, titleHeight - 5, labelWidth, descriptionHeight)];
}
//set title
[titleLabel setTextColor:titleFontColor];
[titleLabel setFont:[UIFont boldSystemFontOfSize:titleFontSize]];
[titleLabel setText:titleText];
[titleLabel setOpaque:FALSE];
//set description
[descriptionLabel setTextColor:descriptionFontColor];
[descriptionLabel setFont:[UIFont systemFontOfSize:descriptionFontSize]];
[descriptionLabel setText:descriptionText];
[descriptionLabel setOpaque:FALSE];
//cell selection style: Blue, Gray, None
if([rowSelectionStyle rangeOfString:@"blue" options:NSCaseInsensitiveSearch].location != NSNotFound){
[self setSelectionStyle:UITableViewCellSelectionStyleBlue];
}
if([rowSelectionStyle rangeOfString:@"gray" options:NSCaseInsensitiveSearch].location != NSNotFound){
[self setSelectionStyle:UITableViewCellSelectionStyleGray];
}
if([rowSelectionStyle rangeOfString:@"none" options:NSCaseInsensitiveSearch].location != NSNotFound){
[self setSelectionStyle:UITableViewCellSelectionStyleNone];
}
//chevron indicator: DisclosureButton, DetailDisclosureButton, Checkmark, None
if([rowAccessoryType rangeOfString:@"arrow" options:NSCaseInsensitiveSearch].location != NSNotFound){
[self setAccessoryType: UITableViewCellAccessoryDisclosureIndicator];
}
if([rowAccessoryType rangeOfString:@"details" options:NSCaseInsensitiveSearch].location != NSNotFound){
[self setAccessoryType: UITableViewCellAccessoryDetailDisclosureButton];
}
if([rowAccessoryType rangeOfString:@"checkmark" options:NSCaseInsensitiveSearch].location != NSNotFound){
[self setAccessoryType: UITableViewCellAccessoryCheckmark];
}
if([rowAccessoryType rangeOfString:@"none" options:NSCaseInsensitiveSearch].location != NSNotFound){
[self setAccessoryType: UITableViewCellAccessoryNone];
}
}