[英]UITableViewCell error loading UIWebView
如您所见,有一个错误。 我在每个UITableViewCell上加载一个UIWebView。 问题在于,当它加载大量数据时,UITableViewCell会消失,而当我滚动文本覆盖本身时,UITableViewCell会消失。
也许UITableViewCell的最大高度是多少?
这是另一个错误?
我能做什么?
编辑:这是viewController代码,用于管理API响应并将每个“帖子”存储为UIWebView,这将加载到主视图和UITableViewCell contentView中。 现在的问题是:哪里是大型网页视图的问题? 码? 最大高度? 记忆?
#import "TopicViewController.h"
#import "HTMLController.h"
NSString *_topicID;
@implementation TopicViewController
@synthesize heightForView = _heightForView;
@synthesize tableView = _tableView;
@synthesize htmlController = _htmlController;
@synthesize pageCounter = _pageCounter;
+ (void)setTopicID:(NSString *)topicID {
_topicID = topicID;
}
- (id)initWithNibName:(NSString *)nibNameOrNil bundle:(NSBundle *)nibBundleOrNil
{
self = [super initWithNibName:nibNameOrNil bundle:nibBundleOrNil];
if (self) {
}
return self;
}
- (void)didReceiveMemoryWarning
{
[super didReceiveMemoryWarning];
}
#pragma mark - View lifecycle
- (void)viewDidLoad
{
[super viewDidLoad];
self.heightForView = [[NSMutableDictionary alloc] init];
self.htmlController = [[HTMLController alloc] init];
[self.htmlController requestTopicWithID:_topicID];
NSInteger viewTag = 117;
for (NSString *html in self.htmlController.postsContent) {
NSString *formattedHTML = [NSString stringWithFormat:@"<div style='overflow: hidden; max-width: device-width;'>%@</div>", html];
NSLog(@"%@", formattedHTML);
UIWebView *content = [[UIWebView alloc] initWithFrame:CGRectMake(0, 0, 300, 1)];
content.tag = viewTag;
content.alpha = 0;
content.opaque = NO;
content.backgroundColor = [UIColor clearColor];
content.scrollView.scrollEnabled = NO;
content.scalesPageToFit = NO;
content.delegate = self;
[self.view addSubview:content];
[content loadHTMLString:formattedHTML baseURL:[NSURL URLWithString:@"http://www.elotrolado.net"]];
NSLog(@"loading wv %i", viewTag);
viewTag++;
}
}
- (void)viewDidUnload
{
[super viewDidUnload];
}
- (BOOL)shouldAutorotateToInterfaceOrientation:(UIInterfaceOrientation)interfaceOrientation
{
return (interfaceOrientation == UIInterfaceOrientationPortrait);
}
#pragma mark - TableViewDelegate & DataSource
- (NSInteger)numberOfSectionsInTableView:(UITableView *)tableView {
return [self.heightForView count]>0 ? [self.heightForView count] : 0;
}
- (NSString *)tableView:(UITableView *)tableView titleForHeaderInSection:(NSInteger)section {
return nil;
}
- (NSInteger)tableView:(UITableView *)tableView numberOfRowsInSection:(NSInteger)section {
return 1;
}
- (CGFloat)tableView:(UITableView *)tableView heightForRowAtIndexPath:(NSIndexPath *)indexPath {
return [self.heightForView count]>0 ? [[self.heightForView objectForKey:[NSString stringWithFormat:@"%i", indexPath.section+117]] floatValue]+20.0 : 0;
}
- (UITableViewCell *)tableView:(UITableView *)tableView cellForRowAtIndexPath:(NSIndexPath *)indexPath {
NSString *cellIdentifier = [NSString stringWithFormat:@"%i", indexPath.section];
UITableViewCell *cell = [tableView dequeueReusableCellWithIdentifier:cellIdentifier];
if (!cell) {
cell = [[UITableViewCell alloc] initWithStyle:UITableViewCellStyleDefault reuseIdentifier:cellIdentifier];
UIView *content = [self.view viewWithTag:(indexPath.section+117)];
content.alpha = 1;
[cell.contentView addSubview:content];
}
return cell;
}
- (void)webViewDidFinishLoad:(UIWebView *)webView {
CGRect frame = webView.frame;
frame.size = [webView sizeThatFits:CGSizeZero];
frame.size.width = 300;
webView.frame = frame;
[self.heightForView setObject:[NSString stringWithFormat:@"%f", frame.size.height] forKey:[NSString stringWithFormat:@"%i", webView.tag]];
if ([self.heightForView count]==[self.htmlController.postsContent count]) {
NSLog(@"All wv loaded");
[self.tableView reloadData];
} else NSLog(@"wv %i loaded", webView.tag);
}
@end
此代码适用于大多数webView,但不适用于大型webView
我在这里找到了答案(tableView:heightForRowAtIndexPaths:文档)
重要由于底层的实现细节,您不应返回大于2009的值。
所以我的解决方案:
CGFloat height = 0;
if ([self.heightForView count]>0) {
if (([[self.heightForView objectForKey:[NSString stringWithFormat:@"%i", indexPath.section+117]] floatValue]+20.0)>2009) {
height = 2009;
UIWebView *content = (UIWebView *)[self.view viewWithTag:(indexPath.section+117)];
content.scrollView.scrollEnabled = YES;
} else height = [[self.heightForView objectForKey:[NSString stringWithFormat:@"%i", indexPath.section+117]] floatValue]+20.0;
}
return height;
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