轉貼：
http://gibuloto.com/blog/uitableviewcell-auto-height/
動態調整 UITableViewCell 的高度假設有一個這樣的 custom UITableViewCell：
因為評論的內容可能有好幾行，高度不一定，所以要做以下的處理：
in CommentCell.m
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
#import "CommentCell.h"
@implementation CommentCell
@synthesize avatarImageView , userNameLabel , timeLabel , commentTextLabel ;
@synthesize comment , delegate ;
- ( void ) awakeFromNib
{
[ super awakeFromNib ];
}
#pragma mark - UI
- ( void ) fillInfo
{
// ...
// 評論
NSString * content = [ comment objectForKey: @"content" ];
double labelHeight = [ self getCellHeight ];
self . commentTextLabel . numberOfLines = 0 ; // 默認值只有 1 行
self . commentTextLabel . text = content ;
self . commentTextLabel . frame = CGRectMake ( self . commentTextLabel . frame . origin . x ,
self . commentTextLabel . frame . origin . y ,
self . commentTextLabel . frame . size . width ,
labelHeight );
}
- ( float ) getCellHeight
{
NSString * content = [ self . comment objectForKey: @"content" ];
double commentTextLabelWidth = self . commentTextLabel . frame . size . width ; // 必須給定一個固定的寬度，才能計算可變的高度
CGSize constraint = CGSizeMake ( commentTextLabelWidth , CGFLOAT_MAX );
CGSize size = [ content sizeWithFont: self . commentTextLabel . font
constrainedToSize: constraint
lineBreakMode: UILineBreakModeWordWrap ];
double minCommentTextLabelHeight = 22.0 ;
CGFloat height = MAX ( size . height , minCommentTextLabelHeight );
return height ;
}
@end
in CommentViewController.m
1
2
3
4
5
6
7
8
9
10
11
12
13
14
#pragma mark - UITableView
- ( CGFloat ) tableView: ( UITableView * ) tableView heightForRowAtIndexPath: ( NSIndexPath * ) indexPath
{
if ( self . comments . count > 0 ) {
CommentCell * testCommentCell = [[ CommentCell alloc ] init ];
testCommentCell . comment = [ self . comments objectAtIndex: indexPath . row ];
return 68 + [ testCommentCell getCellHeight ] + 10 ;
}
else {
return 100 ;
}
}
沒有留言:
張貼留言