自适应高度的表格UICollectionView
1.设置预估高度:flowLayout.estimatedItemSize = CGSizeMake((SCREEN_WIDTH-0*2), (50));//UICollectionViewFlowLayoutAutomaticSize;// 自适应 不设置预估高度表格显示不出来）；
2.不设置表格高度；
3.表格设置为自适应高度（核心代码）。
contentL.preferredMaxLayoutWidth = SCREEN_WIDTH-BaseSize(13)*8; [contentL mas_makeConstraints:^(MASConstraintMaker *make) { make.top.mas_equalTo(BaseSize(13)); make.left.mas_equalTo(noIndexLab.mas_right).offset(BaseSize(3)); make.right.mas_equalTo(-BaseSize(13)); make.bottom.mas_equalTo(-BaseSize(5)); }]; -(UICollectionViewLayoutAttributes*)preferredLayoutAttributesFittingAttributes:(UICollectionViewLayoutAttributes*)layoutAttributes { [self setNeedsLayout]; [self layoutIfNeeded]; CGSize size = [self.contentView systemLayoutSizeFittingSize: layoutAttributes.size]; CGRect cellFrame = layoutAttributes.frame; cellFrame.size.height= size.height; layoutAttributes.frame= cellFrame; return layoutAttributes; }
具体实现：表格代码
#import <UIKit/UIKit.h> #import "QuestSelectCell.h" #import "QuestDetailModel.h" NS_ASSUME_NONNULL_BEGIN @interface QuestSelectCell : UICollectionViewCell @property (weak, nonatomic) UILabel *noIndexLab, *contentLab; @property (weak, nonatomic) UIButton *markBtn; @property (nonatomic,strong) QuestOptionModel *optionModel ; @property (nonatomic,copy) void (^seletBlock)(void) ; @end
#import "QuestSelectCell.h" @implementation QuestSelectCell - (instancetype)initWithFrame:(CGRect)frame { if (self = [super initWithFrame:frame]) { UIButton * btn = [UIButton buttonWithImage:@"round_normal" select:@"round_select"]; [self.contentView addSubview:btn]; [btn addTarget:self action:@selector(btnClick) forControlEvents:UIControlEventTouchUpInside]; [btn mas_makeConstraints:^(MASConstraintMaker *make) { make.top.left.mas_equalTo(BaseSize(13)); make.width.height.mas_equalTo(BaseSize(19.2)); }]; self.markBtn = btn; UILabel *noIndexLab = [UILabel labelWithText:@"A." font:SystemFontOfSize(15) textColor:TextBlackColor]; [self.contentView addSubview:noIndexLab]; [noIndexLab mas_makeConstraints:^(MASConstraintMaker *make) { make.top.mas_equalTo(BaseSize(13)); make.left.mas_equalTo(BaseSize(49)); make.height.width.mas_equalTo(BaseSize(18)); }]; self.noIndexLab = noIndexLab; UILabel *contentL = [UILabel labelWithText:@"内容" font:SystemFontOfSize(15) textColor:TextBlackColor]; contentL.numberOfLines = 0; contentL.preferredMaxLayoutWidth = SCREEN_WIDTH-BaseSize(13)*8; [self.contentView addSubview:contentL]; [contentL mas_makeConstraints:^(MASConstraintMaker *make) { make.top.mas_equalTo(BaseSize(13)); make.left.mas_equalTo(noIndexLab.mas_right).offset(BaseSize(3)); make.right.mas_equalTo(-BaseSize(13)); make.bottom.mas_equalTo(-BaseSize(5)); }]; self.contentLab = contentL; } return self; } - (void)setOptionModel:(QuestOptionModel *)optionModel { _optionModel = optionModel; [self.markBtn setSelected:optionModel.isSelect]; [self.markBtn setImage:optionModel.QType==1?[UIImage imageNamed:@"round_normal"]:[UIImage imageNamed:@"square_normal"] forState:UIControlStateNormal]; [self.markBtn setImage:optionModel.QType==1?[UIImage imageNamed:@"round_select"]:[UIImage imageNamed:@"square_select"] forState:UIControlStateSelected]; self.noIndexLab.text = [NSString stringWithFormat:@"%@.",optionModel.OptionVal] ; [self.contentLab setText:optionModel.OptionTxt]; } - (void)btnClick { if (self.seletBlock) { self.seletBlock(); } } -(UICollectionViewLayoutAttributes*)preferredLayoutAttributesFittingAttributes:(UICollectionViewLayoutAttributes*)layoutAttributes { [self setNeedsLayout]; [self layoutIfNeeded]; CGSize size = [self.contentView systemLayoutSizeFittingSize: layoutAttributes.size]; CGRect cellFrame = layoutAttributes.frame; cellFrame.size.height= size.height; layoutAttributes.frame= cellFrame; return layoutAttributes; } @end
UICollectionView构造类：
- (UICollectionView *)collectionView { if(!_collectionView) { //创建布局 UICollectionViewFlowLayout *flowLayout = [[UICollectionViewFlowLayout alloc]init]; flowLayout.estimatedItemSize = CGSizeMake((SCREEN_WIDTH-0*2), (50));//UICollectionViewFlowLayoutAutomaticSize;// 自适应 //创建CollectionView _collectionView = [[UICollectionView alloc]initWithFrame:CGRectMake(0, 0, kUIScreenWidth, FULL_HEIGHT -(kStatusBarHeight+ TABBAR_HEIGHT+18+5.0+40)) collectionViewLayout:flowLayout]; _collectionView.dataSource = self; _collectionView.delegate = self; _collectionView.showsHorizontalScrollIndicator = NO; _collectionView.showsVerticalScrollIndicator = YES; _collectionView.alwaysBounceVertical = NO; if (@available(iOS 11.0, *)) { _collectionView.contentInsetAdjustmentBehavior = UIScrollViewContentInsetAdjustmentNever; } _collectionView.backgroundColor = [UIColor clearColor];//RGBA(246, 246, 246, 1);//BGColorHex(F9F9F9); [_collectionView registerClass:[UICollectionReusableView class] forSupplementaryViewOfKind:UICollectionElementKindSectionFooter withReuseIdentifier:@"lineFootView"]; // [_collectionView registerClass:[UICollectionViewCell class] forCellWithReuseIdentifier:NSStringFromClass([UICollectionViewCell class])]; [_collectionView registerClass:[FHSchemeCell class] forCellWithReuseIdentifier:NSStringFromClass([FHSchemeCell class])]; [_collectionView registerClass:[FHImageTextCell class] forCellWithReuseIdentifier:NSStringFromClass([FHImageTextCell class])]; // [_collectionView registerClass:[BGCommonDescribeInputCell class] forCellWithReuseIdentifier:NSStringFromClass([BGCommonDescribeInputCell class])]; // [_collectionView registerClass:[DYAddressDescribeInputCell class] forCellWithReuseIdentifier:NSStringFromClass([DYAddressDescribeInputCell class])]; [_collectionView registerClass:[UICollectionReusableView class] forSupplementaryViewOfKind:UICollectionElementKindSectionHeader withReuseIdentifier:@"collectionHeadView"]; // //定义每个UICollectionView 的大小 // flowLayout.itemSize = CGSizeMake((kUIScreenWidth -COMMON_EDGE_DISTANCE*2) , 310); // //定义每个UICollectionView 横向的间距 // flowLayout.minimumLineSpacing = 10; // //定义每个UICollectionView 纵向的间距 // flowLayout.minimumInteritemSpacing = 10; //定义每个UICollectionView 的边距距 // flowLayout.sectionInset = UIEdgeInsetsMake(5, 5, 5, 5);//上左下 @weakify(self); [self.collectionView addImmediatelyRefreshHandler:^{ @strongify(self); // self.firstExcuteHome_personalCommand = NO; [self headerRefresh]; } completeHandler:^{ @strongify(self); }]; [self.collectionView addBITPullToLoadMoreWithActionHandler:^{ @strongify(self); // self.firstExcuteHome_personalCommand = NO; [self footerRefresh]; }]; self.collectionView.showsBITPullToLoadMore = NO; } return _collectionView; }
不要实现表格高度：
//- (CGSize)collectionView:(UICollectionView *)collectionView layout:(UICollectionViewLayout*)collectionViewLayout sizeForItemAtIndexPath:(NSIndexPath *)indexPath { UICollectionViewFlowLayout *layout = [[UICollectionViewFlowLayout alloc]init]; collectionViewLayout.estimatedItemSize = UICollectionViewFlowLayoutAutomaticSize;// 自适应 return UICollectionViewFlowLayoutAutomaticSize; if(indexPath.row < 3) { return CGSizeMake(kUIScreenWidth, 45); } // //}
实现自适应高度和宽度见《使用Masonry实现控件(包括UITableView)根据内容进行宽度自适应和高度自适应》和《使用SDAutoLayout实现控件根据内容进行宽度自适应和高度自适应》。
