我有一个带有UICollectionView
的iOS应用,它会水平呈现单元格。在每个单元格中,我添加了一个简单的标签(暂时)。这些标签显示名称,有时名称很短,很好...但....有时名称很长,因此它们被切断,因为它们无法在集合视图单元格的宽度内正确匹配。
有没有办法动态调整单元格/标签的宽度,以便正确显示名称文字?
我正在尝试使用这种方法:
-(CGSize)collectionView:(UICollectionView *)collectionView layout:(UICollectionViewLayout *)collectionViewLayout sizeForItemAtIndexPath:(NSIndexPath *)indexPath {
return CGSizeMake(106.f, 60.f);
}
但是我对上述方法有两个主要问题:
感谢您的时间,
丹
答案 0 :(得分:0)
您无法访问Label,但您可以访问用于填充标签的数据。通过它,您可以获得标签的高度和宽度:
CGRect labelRect = [text
boundingRectWithSize:CGSizeMake(MAX WIDTH OF YOUR LABEL, CGFLOAT_MAX)
options:NSStringDrawingUsesLineFragmentOrigin
attributes:@{
NSFontAttributeName : [FONT OF YOUR LABEL]
}
context:nil];
答案 1 :(得分:0)
我在TableView
做了同样的事情 - 希望你可以将这个逻辑用于collectionView
celllabelWidth - width of the Cell, you can get it from cellForItemAtIndexPath
celllabelWidth = cell.lblEvent.frame.size.width;
- (CGFloat)findHeightForText:(NSString *)text havingWidth:(CGFloat)widthValue andFont:(UIFont *)font {
CGSize size = CGSizeZero;
if (text) {
//iOS 7
CGRect frame = [text boundingRectWithSize:CGSizeMake(widthValue, CGFLOAT_MAX) options:NSStringDrawingUsesLineFragmentOrigin attributes:@{ NSFontAttributeName:font } context:nil];
size = CGSizeMake(frame.size.width, frame.size.height);
}
return size.height;
}
- (CGFloat)tableView:(UITableView *)tableView heightForRowAtIndexPath:(NSIndexPath *)indexPath
{
CGFloat heightOfRow = 86.0;
NSString *yourBlog = [[self.arrevents objectAtIndex:indexPath.row ] valueForKey:@"info"];
heightOfBlog = [self findHeightForText:yourBlog havingWidth:celllabelWidth andFont:[UIFont fontWithName:@"HelveticaNeue" size:14.0]];
heightOfRow += heightOfBlog + 10;
(long)indexPath.row,heightOfRow);
return heightOfRow;
}
希望最好:)
答案 2 :(得分:0)
我在集合视图中使用以下代码完成了同样的事情:
- (CGSize)collectionView:(UICollectionView *)collectionView layout:(UICollectionViewLayout *)collectionViewLayout sizeForItemAtIndexPath:(NSIndexPath *)indexPath {
CGSize size1 = CGSizeMake(MAX_WIDTH_OF_STRING, [self height:YOUR_STRING];
return size1;
}
-(float)height :(NSString*)string
{
UIFont *newFont = [[Util sharedUtil] fontOfType:FONT_HELVETICA_LT bold:NO size:INTERFACE_IS_PHONE?12:FONT_SIZE_LARGE_CELL];
NSDictionary *arialdict = [NSDictionary dictionaryWithObject:newFont forKey:NSFontAttributeName];
NSMutableAttributedString *message = [[NSMutableAttributedString alloc] initWithString:string attributes:arialdict];
NSAttributedString *attributedText = message;
CGRect rect = [attributedText boundingRectWithSize:(CGSize)
{INTERFACE_IS_PHONE?135:220, MAXFLOAT}
options:NSStringDrawingUsesLineFragmentOrigin
context:nil];
//you need to specify the some width, height will be calculated
CGSize requiredSize = rect.size;
return MAX(requiredSize.height,INTERFACE_IS_PHONE?20:30);
}
希望对你有所帮助。
答案 3 :(得分:0)
感谢大家的发帖,最终解决方案对我来说很有效,是你所有的解决方案和一些额外的"修补":
-(CGSize)collectionView:(UICollectionView *)collectionView layout:(UICollectionViewLayout *)collectionViewLayout sizeForItemAtIndexPath:(NSIndexPath *)indexPath {
// Get the user name and profile name strings.
NSString *user_label = [NSString stringWithFormat:@"%@", [user_data[indexPath.row] objectAtIndex:0]];
NSString *name_label = [NSString stringWithFormat:@"%@", [user_data[indexPath.row] objectAtIndex:1]];
// Calculate the contact text widths.
NSDictionary *attributes = @{NSFontAttributeName:[UIFont fontWithName:@"SFUIDisplay-Thin" size:20.0f]};
CGRect rect = [user_label boundingRectWithSize:CGSizeMake(MAXFLOAT, 60) options:NSStringDrawingUsesLineFragmentOrigin attributes:attributes context:nil];
CGRect rect_two = [name_label boundingRectWithSize:CGSizeMake(MAXFLOAT, 60) options:NSStringDrawingUsesLineFragmentOrigin attributes:attributes context:nil];
// Add the other cell objects width to
// the biggest calculated text width.
CGFloat row_width = 0;
if (rect.size.width > rect_two.size.width) {
row_width = (rect.size.width + 55);
}
else {
row_width = (rect_two.size.width + 55);
}
// Only return the generated width if
// it is bigger than the original width.
if (row_width > 106) {
return CGSizeMake(row_width, 60.f);
}
else {
return CGSizeMake(106, 60.f);
}
}