ios 基于标题文本高度的 UITableView 部分的页眉/页脚高度
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原文地址: http://stackoverflow.com/questions/21085627/
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Header/Footer height of a UITableView section based on title text height
提问by DBoyer
I am wondering if its possible to make the height header/footer for a section of a UITableView be equal to the height of the header/footer title text. Any tips would be great!
我想知道是否有可能使 UITableView 一部分的高度页眉/页脚等于页眉/页脚标题文本的高度。任何提示都会很棒！
Note: some sections of my TableView may not have a header/footer and in that case would just have the padding between sections since the "headerTitleHeight/footerTitleHeight" would be zero in this case.
注意：我的 TableView 的某些部分可能没有页眉/页脚，在这种情况下，部分之间只会有填充，因为在这种情况下“headerTitleHeight/footerTitleHeight”将为零。
-(CGFloat)tableView:(UITableView *)tableView heightForHeaderInSection:(NSInteger)section {
return headerTitleHeight + padding;
}
-(CGFloat)tableView:(UITableView *)tableView heightForFooterInSection:(NSInteger)section {
return footerTitleHeight + padding;
}
回答by Xeieshan
-(CGFloat)tableView:(UITableView *)tableView heightForHeaderInSection:(NSInteger)section
{
NSString *myHeader = [sectionsArray objectAtIndex:section];
CGSize maxSize = CGSizeMake(320, 999999.0);
int height = 0;
NSDictionary *attributesDictionary = [NSDictionary dictionaryWithObjectsAndKeys:
font, NSFontAttributeName,
nil];
if (IS_IOS_6) //Macro i made for if iOS 6
{
CGSize size = [myHeader sizeWithFont:[UIFont fontWithName:@"HelveticaNeue-Bold" size:(15)]
constrainedToSize:maxSize
lineBreakMode:NSLineBreakByWordWrapping];
height = size.height;
}
else // IOS 7 , Attributes
{
CGRect frame = [myHeader boundingRectWithSize:maxSize
options:NSStringDrawingUsesLineFragmentOrigin
attributes:attributesDictionary
context:nil];
height = frame.size.height;
}
return height+5;
}
回答by guywithmazda
You can just
你可以
return UITableViewAutomaticDimension;
EDIT: Oops, ignore the following, see comments below.
编辑：哎呀，忽略以下内容，请参阅下面的评论。
or
或者
return UITableViewAutomaticDimension + padding;
回答by Markicevic
You can you automatic dimensions but you have to have estimated size. It works for Footer and Header the same way.
你可以自动尺寸，但你必须有估计的尺寸。它以相同的方式适用于页脚和页眉。
func tableView(_ tableView: UITableView, estimatedHeightForFooterInSection section: Int) -> CGFloat {
return 300
}
func tableView(_ tableView: UITableView, heightForFooterInSection section: Int) -> CGFloat {
return UITableViewAutomaticDimension
}
回答by NANNAV
Calculate size of text and add padding height
计算文本大小并添加填充高度
-(CGFloat)tableView:(UITableView *)tableView heightForHeaderInSection:(NSInteger)section
{
CGFloat headerTitleHeight = [jobTitleString sizeWithFont:[UIFont fontWithName:@"OpenSans-Light" size:20.0f] constrainedToSize:CGSizeMake(width,9999)].height;
return headerTitleHeight + padding;
}
回答by Phan Van Linh
In viewDidLoad, heightForFooterInSectionand heightForHeaderInSection
在viewDidLoad,heightForFooterInSection和heightForHeaderInSection
- (void)viewDidLoad {
[super viewDidLoad];
self.tableView.estimatedSectionFooterHeight = 50; // for footer
self.tableView.estimatedSectionHeaderHeight = 50; // for header
}
- (CGFloat)tableView:(UITableView *)tableView heightForFooterInSection:(NSInteger)section{
return UITableViewAutomaticDimension;
}
- (CGFloat)tableView:(UITableView *)tableView heightForHeaderInSection:(NSInteger)section{
return UITableViewAutomaticDimension;
}
In Footer/Header xib file
- Add BOTH constraint top and bottomto ContainerViewfor your UILabel
- Add UILabel constraint height then change UILabel constraint height from Equal-> Greater than or Equals
- Finaly change UILabel line to 0
在页脚/头XIB文件
-添加BOTH约束顶部和底部，以ContainerView你的UILabel
-添加的UILabel约束高度然后从改变的UILabel约束高度Equal- > Greater than or Equals
- Finaly变化的UILabel线0
回答by Praveen S
You could use boundingRectWithSizemethod to get the height required to draw the particular NSString for the header/footer and then return the values in the UITableView delegate methods. For sections without header footer, you have to code to just return the padding.
您可以使用boundingRectWithSize方法获取为页眉/页脚绘制特定 NSString 所需的高度，然后返回 UITableView 委托方法中的值。对于没有页眉页脚的部分，您必须编码以仅返回填充。
回答by RAJA
You can try the below..
你可以试试下面的..
CGSize constraint = CGSizeMake(<header/footer width>, <max header/footer height>);
CGSize size;
if([[[UIDevice currentDevice] systemVersion] floatValue] >= 7.0)
{
NSRange range = NSMakeRange(0, [<string> length]);
NSDictionary *attributes = [<string> attributesAtIndex:0 effectiveRange:&range];
CGSize boundingBox = [<string> boundingRectWithSize:constraint options: NSStringDrawingUsesLineFragmentOrigin attributes:attributes context:nil].size;
size = CGSizeMake(ceil(boundingBox.width), ceil(boundingBox.height));
}
else
{
size = [<string> sizeWithFont:descriptionLabel.font constrainedToSize:constraint lineBreakMode:descriptionLabel.lineBreakMode];
}
return size.height + padding;
or
或者
CGSize maximumLabelSize = CGSizeMake(<header/footer width>, <max header/footer height>);
CGSize expectedSize = [<string label> sizeThatFits:maximumLabelSize];
return expectedSize.height + padding;
