使用xcode 4在iphone中动态表视图单元格高度
我有视图控制器，其中包含帖子详细信息和表视图。表格单元格是自定义的。我放了uilabel，uibutton＆amp; uitextview on cell。此表格单元格包含注释和回复帖子。因此表格单元格高度是动态的。如果评论有回复，则正确显示单元格的高度。但是如果评论没有回复，那么错误地计算表格单元格高度。我想要桌子和桌子表视图高度应根据单元格的内容动态显示。我的视图控制器包含另一个被称为“内容视图”的视图，我在其中放置了帖子详细信息＆amp;我的表视图。以下是我的图片，可以让您了解我的观点。 下图是仅了解视图。
这是我的代码
#define TABLE_CELL_HEIGHT 200.0f
#define ADD_VIEW_HEIGHT 30.0f
#define FONT_SIZE 24.0f
#define CELL_CONTENT_WIDTH 720.0f
#define CELL_CONTENT_MARGIN 50.0f
#define SectionHeight 50.0f
#define LEFT_MARGIN 25
#define RIGHT_MARGIN 25
#define TOP_MARGIN 35
#define BOTTOM_MARGIN 50
#define BOTTOM_FOOTER_MARGIN 32
#define DOC_WIDTH 768
#define DOC_HEIGHT 910
- (void)viewDidLoad
{
[super viewDidLoad];
[self createUserInterface];
[self createCommentUserInterface];
self.contentView.backgroundColor = SET_BACKGROUND_IMAGE;
self.view.backgroundColor = SET_BACKGROUND_IMAGE;
}
- (void)viewWillAppear:(BOOL)animated
{
[super viewWillAppear:animated];
[self displayCommentsForPhotoID:[post ID]];
[self.commentsTableView reloadData];
CGRect frame = self.commentsTableView.frame;
frame.size.height = TABLE_CELL_HEIGHT*[commentsArray count];
self.commentsTableView.frame = frame;
CGRect viewFrame = self.contentView.frame;
viewFrame.size.height = viewFrame.size.height + (TABLE_CELL_HEIGHT*[commentsArray count]) + ADD_VIEW_HEIGHT;
self.contentView.frame = viewFrame;
[self.scrollView addSubview:self.contentView];
self.scrollView.contentSize = self.contentView.bounds.size;
}
-(void)createCommentUserInterface {
UILabel *lblComments = [[UILabel alloc]initWithFrame:CGRectMake(20.0f, 570.0f, 150.0f, 30.0f)];
[lblComments setBackgroundColor:[UIColor clearColor]];
[lblComments setText:@"Comments"];
[self.contentView addSubview:lblComments];
UIButton *btnAddComment = [UIButton buttonWithType:UIButtonTypeRoundedRect];
[btnAddComment addTarget:self
action:@selector(btnAddCommentPressed)
forControlEvents:UIControlEventTouchDown];
[btnAddComment setBackgroundImage:[UIImage imageNamed:@"btn_addcomment.png"] forState:UIControlStateNormal];
btnAddComment.frame = CGRectMake(20.0f, 610.0f, 140.0f, 40.0f);
[self.contentView addSubview:btnAddComment];
commentsTableView = [[UITableView alloc]initWithFrame:CGRectMake(20.0f, 660.0f, 280.0f, 600.0f) style:UITableViewStylePlain];
commentsTableView.delegate = self;
commentsTableView.dataSource = self;
[self.contentView addSubview:commentsTableView];
}
#pragma mark - Table view data source
-(NSInteger)numberOfSectionsInTableView:(UITableView *)tableView
{
// Return the number of sections.
return 1;
}
-(NSInteger)tableView:(UITableView *)tableView numberOfRowsInSection:(NSInteger)section
{
return [self.commentsArray count];
}
- (UITableViewCell *)tableView:(UITableView *)tableView cellForRowAtIndexPath:(NSIndexPath *)indexPath
{
static NSString *CellIdentifier = @"Cell";
UITableViewCell *cell;
cell = [tableView dequeueReusableCellWithIdentifier:CellIdentifier];
cell = nil;
if (cell == nil) {
cell = [[[UITableViewCell alloc] initWithStyle:UITableViewCellStyleDefault reuseIdentifier:CellIdentifier] autorelease];
}
[tableView setSeparatorColor:[UIColor darkGrayColor]];
[cell setSelectionStyle:UITableViewCellSelectionStyleNone];
cell.backgroundColor = [UIColor whiteColor];
userComment = [commentsArray objectAtIndex:[indexPath row]];
UILabel *lblSubmittedBy = [[UILabel alloc]initWithFrame:CGRectMake(10.0f, 5.0f, 100.0f, 30.0f)];
[lblSubmittedBy setText:@"Submitted by"];
[cell addSubview:lblSubmittedBy];
UIButton *btnUserName = [UIButton buttonWithType:UIButtonTypeCustom];
btnUserName.frame = CGRectMake(120.0f, 5.0f, 150.0f, 30.0f);
[btnUserName setContentHorizontalAlignment:UIControlContentHorizontalAlignmentLeft];
[btnUserName setBackgroundColor:[UIColor clearColor]];
[btnUserName setTitleColor:[UIColor cyanColor] forState:UIControlStateNormal];
[btnUserName addTarget:self action:@selector(showUserProfileForUserComment:) forControlEvents:UIControlEventTouchUpInside];
[btnUserName setUserInteractionEnabled:YES];
[cell addSubview:btnUserName];
UILabel *lblOnDate = [[UILabel alloc]initWithFrame:CGRectMake(10.0f, 40.0f, 20.0f, 30.0f)];
[lblOnDate setText:@"on"];
[cell addSubview:lblOnDate];
UILabel *lblDate = [[UILabel alloc]initWithFrame:CGRectMake(35.0f, 40.0f, 200.0f, 30.0f)];
[cell addSubview:lblDate];
UITextView *txtVwComments = [[UITextView alloc]initWithFrame:CGRectMake(5.0f, 75.0f, 265.0f, 70.0f)];
txtVwComments.backgroundColor = cell.backgroundColor;
[txtVwComments setFont:[UIFont fontWithName:@"Helvetica" size:17.0f]];
[txtVwComments setEditable:NO];
[cell addSubview:txtVwComments];
[txtVwComments setText:[userComment Comment]];
CGRect frame = txtVwComments.frame;
frame.size.height = txtVwComments.contentSize.height;
CGFloat height = frame.size.height;
NSLog(@"Value of height => %f",height);
txtVwComments.frame = frame;
CGFloat ht1 = height + 20.0f + 75.0f;
UIButton *btnUpVote = [[UIButton alloc]initWithFrame:CGRectMake(10.0f, ht1 + 10.0f, 16.0f, 16.0f)];
[btnUpVote setBackgroundColor:[UIColor clearColor]];
[btnUpVote setBackgroundImage:[UIImage imageNamed:@"thumb_up.png"] forState:UIControlStateNormal];
[btnUpVote addTarget:self
action:@selector(btnUpVotePressed:)
forControlEvents:UIControlEventTouchDown];
[btnUpVote setTag:[userComment ID]];
[cell addSubview:btnUpVote];
NSLog(@"Value of ht1 => %f",ht1);
lblUpVoteCount = [[UILabel alloc]initWithFrame:CGRectMake(36.0f, ht1 , 30.0f, 30.0f)];
[lblUpVoteCount setTag:[userComment ID]];
[cell addSubview:lblUpVoteCount];
UIButton *btnDownVote = [[UIButton alloc]initWithFrame:CGRectMake(90.0f, ht1 + 10.0f , 16.0f, 16.0f)];
[btnDownVote setBackgroundColor:[UIColor clearColor]];
[btnDownVote setBackgroundImage:[UIImage imageNamed:@"thumb_down.png"] forState:UIControlStateNormal];
[btnDownVote addTarget:self
action:@selector(btnDownVotePressed:)
forControlEvents:UIControlEventTouchDown];
[btnDownVote setTag:[userComment ID]];
[cell addSubview:btnDownVote];
lblDownVoteCount = [[UILabel alloc]initWithFrame:CGRectMake(116.0f, ht1 , 40.0f, 30.0f)];
[lblDownVoteCount setTag:[userComment ID]];
[cell addSubview:lblDownVoteCount];
UIButton *btnReply = [UIButton buttonWithType:UIButtonTypeRoundedRect];
btnReply.frame = CGRectMake(180.0f, ht1, 60.0f, 30.0f);
[btnReply setBackgroundColor:[UIColor clearColor]];
[btnReply setBackgroundImage:[UIImage imageNamed:@"btn_reply.png"] forState:UIControlStateNormal];
[btnReply addTarget:self action:@selector(btnReplyPressed:) forControlEvents:UIControlEventTouchDown];
[btnReply setTag:[userComment ID]];
[cell addSubview:btnReply];
float y = ht1 + 40.0f;
for (int i=0; i < [userComment.replyArray count]; i++) {
if ([userComment.replyArray objectAtIndex:i] != nil) {
UITextView *txtVwReply = [[UITextView alloc]initWithFrame:CGRectMake(40.0f, y , 220.0,60.0f)];
[txtVwReply setUserInteractionEnabled:NO];
[txtVwReply setFont:[UIFont fontWithName:@"Helvetica" size:14.0f]];
[cell addSubview:txtVwReply];
commentReply = [userComment.replyArray objectAtIndex:i];
NSLog(@"userComment.replyArray => %@",userComment.replyArray);
NSLog(@"commReply object => %@",commentReply);
strReply = [NSString stringWithFormat:@"Submitted by %@ \n on %@\n %@",[commentReply ReplyUsername],[commentReply ReplyDateAdded],[commentReply ReplyComment]];
NSLog(@"strReply => %@",strReply);
[txtVwReply setText:strReply];
[txtVwReply release];
y = y +80;
}
}
[btnUserName setTitle:[userComment Username] forState:UIControlStateNormal];
[lblDate setText:[userComment DateAdded]];
[lblUpVoteCount setText:[NSString stringWithFormat:@"%i",[userComment UpVotes]]];
[lblDownVoteCount setText:[NSString stringWithFormat:@"%i",[userComment DownVotes]]];
[lblSubmittedBy release];
[lblOnDate release];
[lblDate release];
[txtVwComments release];
[btnUpVote release];
[lblUpVoteCount release];
[btnDownVote release];
[lblDownVoteCount release];
return cell;
}
#pragma mark - Table view delegate
-(void)tableView:(UITableView *)tableView didSelectRowAtIndexPath:(NSIndexPath *)indexPath
{
// I don't want this event
}
-(CGFloat)tableView:(UITableView *)tableView heightForRowAtIndexPath:(NSIndexPath *)indexPath
{
if ([commentsArray count]>0) {
userComment = [commentsArray objectAtIndex:indexPath.row];
NSString *strComment =userComment.Comment;
NSLog(@"strComment : - %@",strComment);
CGFloat replyHeight = 50.0f;
if([userComment.replyArray count]>0) {
for (int i=0; i < [userComment.replyArray count]; i++) {
commentReply = [userComment.replyArray objectAtIndex:i];
NSString *strCommentReply = commentReply.ReplyComment;
NSLog(@"strCommentReply => %@",strCommentReply);
[strCommentReply stringByAppendingFormat:@"\n %@",strCommentReply];
replyHeight = replyHeight + 50;
}
}
CGSize constraint = CGSizeMake(CELL_CONTENT_WIDTH - (CELL_CONTENT_MARGIN * 2), 20000.0f);
CGSize sizeComment = [strComment sizeWithFont:[UIFont systemFontOfSize:FONT_SIZE] constrainedToSize:constraint lineBreakMode:UILineBreakModeWordWrap];
CGFloat height = MAX(sizeComment.height + replyHeight, 44.0f);
NSLog(@"height %f",height);
NSLog(@"height + (CELL_CONTENT_MARGIN ) + TABLE_CELL_HEIGHT => %f",height + (CELL_CONTENT_MARGIN ) + TABLE_CELL_HEIGHT);
NSLog(@"TABLE_CELL_HEIGHT - %f",height + (CELL_CONTENT_MARGIN ) + TABLE_CELL_HEIGHT);
return height + (CELL_CONTENT_MARGIN ) + TABLE_CELL_HEIGHT;
}
NSLog(@"TABLE_CELL_HEIGHT - %f",TABLE_CELL_HEIGHT);
return TABLE_CELL_HEIGHT;
}
请指导我这个问题。谢谢
代码更新
- (UITableViewCell *)tableView:(UITableView *)tableView cellForRowAtIndexPath:(NSIndexPath *)indexPath
{
// Code for placing UI components on the cell .Same as above code
float y = ht1 + 40.0f;
for (int i=0; i < [userComment.replyArray count]; i++) {
if ([userComment.replyArray objectAtIndex:i] != nil) {
UITextView *txtVwReply = [[UITextView alloc]initWithFrame:CGRectMake(40.0f, y , 220.0,0.0f)];
[txtVwReply setUserInteractionEnabled:NO];
[txtVwReply setFont:[UIFont fontWithName:@"Helvetica" size:14.0f]];
[cell addSubview:txtVwReply];
commentReply = [userComment.replyArray objectAtIndex:i];
NSLog(@"userComment.replyArray => %@",userComment.replyArray);
NSLog(@"commReply object => %@",commentReply);
strReply = [NSString stringWithFormat:@"Submitted by %@ \n on %@\n %@",[commentReply ReplyUsername],[commentReply ReplyDateAdded],[commentReply ReplyComment]];
NSLog(@"strReply => %@",strReply);
[txtVwReply setText:strReply];
CGRect frame = txtVwReply.frame;
frame.size.height = txtVwReply.contentSize.height;
CGFloat height = frame.size.height;
NSLog(@"Value of height => %f",height);
txtVwReply.frame = frame;
y = y + 80;
[txtVwReply release];
}
}
}
- (CGFloat)tableView:(UITableView *)tableView heightForRowAtIndexPath:(NSIndexPath *)indexPath
{
if ([commentsArray count]>0) {
userComment = [commentsArray objectAtIndex:indexPath.row];
NSString *strComment =userComment.Comment;
NSLog(@"strComment : - %@",strComment);
CGFloat replyHeight = 135.0f;
if([userComment.replyArray count]>0) {
for (int i=0; i < [userComment.replyArray count]; i++) {
commentReply = [userComment.replyArray objectAtIndex:i];
NSString *strCommentReply = commentReply.ReplyComment;
NSLog(@"strCommentReply => %@",strCommentReply);
// Append all the reply & then use to determine hight
[strCommentReply stringByAppendingFormat:@"\n %@",strCommentReply];
replyHeight = replyHeight + 100.0f;
}
}
CGSize constraint = CGSizeMake(CELL_CONTENT_WIDTH - (CELL_CONTENT_MARGIN * 2), 20000.0f);
CGSize sizeComment = [strComment sizeWithFont:[UIFont systemFontOfSize:FONT_SIZE] constrainedToSize:constraint lineBreakMode:UILineBreakModeWordWrap];
CGFloat height = MAX(sizeComment.height + replyHeight + 40.0f, 44.0f);
NSLog(@"height %f",height);
NSLog(@"height + (CELL_CONTENT_MARGIN ) + TABLE_CELL_HEIGHT => %f",height + (CELL_CONTENT_MARGIN ) + TABLE_CELL_HEIGHT);
NSLog(@"TABLE_CELL_HEIGHT - %f",height + (CELL_CONTENT_MARGIN ) + TABLE_CELL_HEIGHT);
return height;
}
NSLog(@"TABLE_CELL_HEIGHT - %f",TABLE_CELL_HEIGHT);
return TABLE_CELL_HEIGHT;
}
3 个答案:
答案 0 :(得分：2)
我看不到你在哪里实现了tableview委托方法：
-(CGFloat)tableView:(UITableView *)tableView heightForRowAtIndexPath:(NSIndexPath *)indexPath
这是我想要测试你的内容并提供单元格大小的地方。
答案 1 :(得分：1)
我认为您的计算不正确。如果我正确地遵循它，我猜想只有一些回复，它恰好接近正确的大小。太多的评论，它会太小，没有评论你的单元格高度会超大。 这是因为您基本上将整体行高计算为：
50.0（replyHeight的初始值）+ commentHeight +（50.0 x replyArray.count）
如果没有回复，将是50 +评论的高度（注意永远不会少于44，所以你的MAX永远不会少回复）。然后添加常量TCM和CCH，总共300 +注释的高度。
在你的cellForRowAtIndexPath中，似乎只需135.0 +评论的高度就可以单独评论。因此，如果您没有回复，您的行数几乎是所需大小的两倍。 通过一些回复看起来正确的原因是你每次回复都使用80.0，但你只是在行高增加了50.0。它每次接近30点，然后在大约4或5次迭代中均匀。更多，它将开始太小。
我认为如果你在135.0初始化replyHeight并将replyHeight的增量更改为80而不是50.0，则计算应该更接近。因为在这个浏览器中很难遵循，所以我可能会离开。 然后从返回值中删除两个变量TABLE_CONTENT_MARGIN和TABLE_CELL_HEIGHT。 返回值135 + commentHeight +（80 x replyArray.count）应该是正确的。您不需要遍历注释，因为您没有将字符串用于我能看到的任何内容。你可能也需要那个T_C_M，但是你玩它时应该很容易看到它。
答案 2 :(得分：0)
temparray是您用于在cellForRowAtIndexPath中加载单元格的数组
(CGFloat)tableView:(UITableView *)tableView heightForRowAtIndexPath:(NSIndexPath *)indexPath
{
NSString *str = [temparray objectAtIndex:indexPath.row];
If (str. length > 50) {
return 85;
}
else {
return 60;
}
}
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