我有UITableView因为我有自定义单元格。自定义单元格包含一些标签。标签文本可以是动态的，具体取决于Json。现在我想根据标签的内容高度来制作单元格的高度，所以我使用了方法heightForRowAtINdexPath。现在我得到了这样的单元格。
if(!self.customCell)
{
self.customCell = [self.table_view dequeueReusableCellWithIdentifier:@"homeCell"];
}
标签可以是多行的，具体取决于数据。如果我在cellForRowAtiNdexPath中编写heightForRowAtIndexPath的相同代码，那么我会获得更多高度。但如果我不写相同的代码然后我的标签高度减少了。
截至目前，我已经为heightForRowAtIndexPath编写了以下代码。
- (CGFloat)tableView:(UITableView *)tableView heightForRowAtIndexPath:(NSIndexPath *)indexPath
{
CGFloat height;
float like_height,c_one_height,c_two_height,c_three_height,tv_height,header_height,operations_height,img_like_icon_height,img_comment_icon_height,header_margin=5,tv_container_margin=5,operations_margin=5,like_top_margin=11,first_comment=10,second_comment=5,third_comment=5;
//define variables here
if(!self.customCell)
{
self.customCell = [self.table_view dequeueReusableCellWithIdentifier:@"homeCell"];
}
Post *user_post=[arr_post objectAtIndex:indexPath.row];
int like_count=[user_post.like_count intValue];
float comment_count=[user_post.comment_count intValue];
if (self.customCell.beizer_image != nil)
{
NSLog(@"inside cell beizer");
[self.customCell.beizer_image removeFromSuperview];
self.customCell.beizer_image=nil;
self.customCell.tv_post.textContainer.exclusionPaths=NULL;
self.customCell.beizer_path=nil;
}
[self.customCell setSelectionStyle:UITableViewCellSelectionStyleNone];
self.customCell.tv_post.text=user_post.post_description;
self.customCell.tv_post.font = [UIFont fontWithName:user_post.font_family size:[user_post.font_size floatValue]];
[self.customCell.tv_post setTextColor:[self colorFromHexString:user_post.font_color]];
if([user_post.post_image isEqualToString:@"none"] && [user_post.post_video isEqualToString:@"none"])
{
NSLog(@"NOT INSIDE THE CONDITION");
}
else
{
NSLog(@"INSIDE BEIZER PATH CONDITION");
self.customCell.beizer_path = [UIBezierPath bezierPathWithRect:CGRectMake(5, 5, 100, 100)];
self.customCell.tv_post.textContainer.exclusionPaths = @[self.customCell.beizer_path];
self.customCell.beizer_image =[[UIImageView alloc]initWithFrame:CGRectMake(5, 5, 100, 100)];
if(![user_post.post_image isEqualToString:@"none"])
{
[self.customCell.beizer_image setImageWithURL:[NSURL URLWithString:[IMAGE_BASE_URL stringByAppendingString:user_post.post_image]]placeholderImage:[UIImage imageNamed:@"post_placeholder.png"]];
}
if(![user_post.post_video isEqualToString:@"none"])
{
[self.customCell.beizer_image setImageWithURL:[NSURL URLWithString:[IMAGE_BASE_URL stringByAppendingString:user_post.post_video_thumbnail]]placeholderImage:[UIImage imageNamed:@"post_placeholder.png"]];
}
[self.customCell.tv_post addSubview:self.customCell.beizer_image];
}
//make textview height dynamic
self.customCell.tv_post.scrollEnabled=NO;
if([user_post.post_image isEqualToString:@"none"] && [user_post.post_video isEqualToString:@"none"])
{
CGFloat fixedWidth = self.customCell.tv_post.frame.size.width;
CGSize newSize = [self.customCell.tv_post sizeThatFits:CGSizeMake(fixedWidth, MAXFLOAT)];
CGRect newFrame = self.customCell.tv_post.frame;
newFrame.size = CGSizeMake(fmaxf(newSize.width, fixedWidth), newSize.height);
self.customCell.tv_post.frame = newFrame;
self.customCell.tv_height.constant=self.customCell.tv_post.frame.size.height;
[self.customCell.view_tvContainer layoutIfNeeded];
}
else
{
CGFloat fixedWidth = self.customCell.tv_post.frame.size.width;
CGSize newSize = [self.customCell.tv_post sizeThatFits:CGSizeMake(fixedWidth, MAXFLOAT)];
CGRect newFrame = self.customCell.tv_post.frame;
newFrame.size = CGSizeMake(fmaxf(newSize.width, fixedWidth),fmax(self.customCell.beizer_image.frame.size.height+10,newSize.height));
self.customCell.tv_post.frame = newFrame;
self.customCell.tv_height.constant=self.customCell.tv_post.frame.size.height;
[self.customCell.view_tvContainer layoutIfNeeded];
}
// self.customCell.f_comment_top.constant=-2100;
// [self.customCell layoutIfNeeded];
if(like_count>0)
{
like_height=self.customCell.label_like_count.frame.size.height;
}
else
{
like_height=0;
img_like_icon_height=0;
}
if(comment_count<=0)
{
c_one_height=0;
c_two_height=0;
c_three_height=0;
img_comment_icon_height=0;
}
else if(comment_count==1)
{
if(like_count<=0)
{
self.view.translatesAutoresizingMaskIntoConstraints = NO;
self.customCell.f_comment_top.constant=-21;
[self.customCell layoutIfNeeded];
}
c_one_height=self.customCell.first_comment.frame.size.height;
c_two_height=0;
c_three_height=0;
}
else if(comment_count==2)
{
if(like_count<=0)
{
self.view.translatesAutoresizingMaskIntoConstraints = NO;
self.customCell.f_comment_top.constant=-21;
[self.customCell layoutIfNeeded];
}
c_one_height=self.customCell.first_comment.frame.size.height;
c_two_height=self.customCell.second_cmment.frame.size.height+15;
c_three_height=0;
}
else if(comment_count==3)
{
if(like_count<=0)
{
// self.customCell.f_comment_top.constant=1020;
// [self.customCell.first_comment layoutIfNeeded];
}
else
{
}
c_one_height=self.customCell.first_comment.frame.size.height;
c_two_height=self.customCell.second_cmment.frame.size.height;
c_three_height=self.customCell.third_comment.frame.size.height+15;
}
tv_height=self.customCell.view_tvContainer.frame.size.height;
header_height=self.customCell.header_view_height.frame.size.height;
operations_height=self.customCell.view_operations_height.frame.size.height;
height = like_height+c_one_height+c_two_height+c_three_height+tv_height+operations_height+header_height;
CGFloat margin_height=header_margin+operations_margin+tv_container_margin+like_top_margin+first_comment+second_comment+third_comment+img_comment_icon_height+img_like_icon_height;
NSLog(@"like label height is %f",like_height);
NSLog(@"first comment height is %f",c_one_height);
NSLog(@"second comment height is %f",c_two_height);
NSLog(@"third comment height is %f",c_three_height);
NSLog(@"all margin height is %f",margin_height);
NSLog(@"height is %f",height);
// Padding of 1 point (cell separator)
height=height+margin_height;
CGFloat separatorHeight = 1;
return height;
}
我已经看到很多例子，其中写道，为了配置单元格，cellForRowAtIndexPath的代码写在heightForRowAtIndexPath中。
cellForRowAtIndexPath的代码
heightForRowAtIndexPath？答案 0 :(得分：0)
为什么我需要在heightForRowAtIndexPath中重复cellForRowAtIndexPath的代码？
因为heightForRowAtIndexPath将始终在cellForRowAtIndexPath之前被调用。因此，要计算heightForRowAtIndexPath中的高度，您需要在heightForRowAtIndexPath中创建该单元格。
使用autolayout进行动态高度计算的最佳方法： - 您可以参考以下Link来执行相同操作。
答案 1 :(得分：0)
您无需在entire中cellForRowAtIndexPath中配置已声明的heightForRowAtIndexPath单元格。
这是用于特定功能的两种方法。
cellForRowAtIndexPath是一种DataSource方法，用于在tableview中配置您的单元格。
heightForRowAtIndexPath是一种Delegate方法，用于根据您计划在{{1}中显示的内容计算tableviewcell或row的高度}}
例如，如果您使用cellForRowAtIndexPath配置单元格（无论标签数量多少）并在UILabel中为标签指定一些文字，则在cellForRowAtIndexPath中，获取已分配给标签的文本，计算标签的高度并将标签的高度赋予单元格。这将创建根据标签高度高度的单元格。
例如，在heightForRowAtIndexPath，
cellForRowAtIndexPath .....//your cell configuration code above//.....
UILabel *lbl_myText = [[UILabel alloc]initWithFrame:CGRectZero];
[lbl_myText setLineBreakMode:NSLineBreakByWordWrapping];
lbl_myText.minimumScaleFactor = FONT_SIZE;
[lbl_myText setNumberOfLines:0];
lbl_myText.textAlignment = NSTextAlignmentRight;
[lbl_myText setFont:[UIFont systemFontOfSize:FONT_SIZE]];
NSString *text = [arr_text objectAtIndex:indexPath.row];
CGSize constraint = CGSizeMake(Your_MAX_LabelWidth, Your_MAX_LabelHeight);
NSMutableParagraphStyle *paragraphStyle = [[NSMutableParagraphStyle alloc] init];
paragraphStyle.lineBreakMode = NSLineBreakByWordWrapping;
CGRect textRect = [text boundingRectWithSize:constraint
options:NSStringDrawingUsesLineFragmentOrigin
attributes:@{NSFontAttributeName:[UIFont systemFontOfSize:FONT_SIZE], NSParagraphStyleAttributeName: paragraphStyle.copy}
context:nil];
size = textRect.size;
[lbl_myText setText:text];
float widthIs = [lbl_myText.text
boundingRectWithSize:constraint
options:NSStringDrawingUsesLineFragmentOrigin
attributes:@{ NSFontAttributeName:lbl_myText.font }
context:nil]
.size.width;
[lbl_myText setFrame:CGRectMake(X_co,Y_co,widthIs,size.height)];
中的：
heightForRowAtIndexPath