问题描述
自定义一个tableview，但是主控制器中实现之后，没有加载cell，打断点，发现cellForRowAtIndexPath:(NSIndexPath *)indexPath方法没有进入，就是没有被调用。下面是自定义UITableView的代码：.h文件
#import <UIKit/UIKit.h>#import 'GCProductModel.h'@interface RecommendComView : UITableView@property(nonatomic,strong) NSMutableArray *productsArr;@property (nonatomic,strong) UIButton *unfoldBtn;-(void) setButtonUnFoldStatus;-(void)setButtonFoldStatus;@end #import 'RecommendComView.h'.m文件#import 'UIColor+DecColor.h'#define DEVICE_WIDTH [UIScreen mainScreen].bounds.size.width#define DEVICE_HEIGHT [UIScreen mainScreen].bounds.size.heightstatic const CGFloat viewHeight = 44.0f;static const CGFloat navigationHeight = 64.0f;@interface RecommendComView()@property (nonatomic,strong) UILabel *desLbl;@property (nonatomic,strong) UIView *headerView;@end@implementation RecommendComView-(instancetype)initWithFrame:(CGRect)frame style:(UITableViewStyle)style{ if(self=[super initWithFrame:frame style:style]) {_unfoldBtn = [[UIButton alloc]init];_desLbl = [[UILabel alloc] init];//设置btn[self setButtonUnFoldStatus];//设置label_desLbl.font = [UIFont fontWithName:@'PingFangSC-Regular' size:13.0f];_desLbl.textColor = [UIColor decColorWithRed:46 green:46 blue:46 alpha:1];[self setFrame:CGRectMake(0, navigationHeight, DEVICE_WIDTH, viewHeight*4)];//设置headerview_headerView = [[UIView alloc]initWithFrame:CGRectMake(0,0, DEVICE_WIDTH, viewHeight)];UIBlurEffect * blurEffect = [UIBlurEffect effectWithStyle:UIBlurEffectStyleLight];// 毛玻璃视图UIVisualEffectView * effectView = [[UIVisualEffectView alloc] initWithEffect:blurEffect];effectView.backgroundColor = [UIColor decColorWithRed:252 green:252 blue:252 alpha:0.08f];//添加到要有毛玻璃特效的控件中effectView.frame = self.bounds;[self addSubview:effectView];//设置底层透明度self.backgroundColor = [UIColor decColorWithRed:255 green:255 blue:255 alpha:0.85];self.scrollEnabled = NO;self.tableHeaderView = _headerView; } return self;}-(void) layoutSubviews{ //设置button的Frame [_unfoldBtn setFrame:CGRectMake(DEVICE_WIDTH-15-26, 15.5, 26, 13)]; [self.headerView addSubview:_unfoldBtn]; [self.headerView addSubview:_desLbl];}#pragma mark - setButtonStatus-(void) setButtonUnFoldStatus{ [_unfoldBtn setTitle:@'展开' forState:UIControlStateNormal]; _unfoldBtn.titleLabel.font = [UIFont fontWithName:@'PingFangSC-Regular' size:13.0f]; [_unfoldBtn setTitleColor:[UIColor decColorWithRed:255 green:100 blue:100 alpha:1] forState:UIControlStateNormal];}-(void)setButtonFoldStatus{ [_unfoldBtn setTitle:@'收起' forState:UIControlStateNormal]; _unfoldBtn.titleLabel.font = [UIFont fontWithName:@'PingFangSC-Regular' size:13.0f]; [_unfoldBtn setTitleColor:[UIColor decColorWithRed:255 green:100 blue:100 alpha:1] forState:UIControlStateNormal];}-(void) setProductsArr:(NSMutableArray *)productsArr{ _productsArr = productsArr; _desLbl.text = [NSString stringWithFormat:@'共有%lu件商品' ,(unsigned long)_productsArr.count]; [_desLbl sizeToFit];//设置商品图标 if(_productsArr.count<3) {for(int i = 0;i<_productsArr.count;i++){ GCProductModel *product = _productsArr[i]; UIImageView *imgView = [[UIImageView alloc]initWithFrame:CGRectMake(15+36*i, 6, 32, 32)]; imgView.image = [UIImage imageNamed:product.coverImg]; imgView.backgroundColor = [UIColor redColor]; [_headerView addSubview:imgView];}[_desLbl setFrame:CGRectMake(15+36*_productsArr.count+4, 15.5, _desLbl.frame.size.width, _desLbl.frame.size.height)]; }else {for(int i = 0;i<3;i++){ GCProductModel *product = _productsArr[i]; UIImageView *imgView = [[UIImageView alloc]initWithFrame:CGRectMake(15+36*i, 6, 32, 32)]; imgView.image = [UIImage imageNamed:product.coverImg]; imgView.backgroundColor = [UIColor redColor]; [_headerView addSubview:imgView];}[_desLbl setFrame:CGRectMake(15+36*3+4, 15.5, _desLbl.frame.size.width, _desLbl.frame.size.height)]; }}@end自定义cell
#import 'CombProductCell.h'#import 'UIColor+DecColor.h'#define DEVICE_WIDTH [UIScreen mainScreen].bounds.size.width#define DEVICE_HEIGHT [UIScreen mainScreen].bounds.size.heightstatic const CGFloat ImgLength = 32.0f;@interface CombProductCell()@property (nonatomic,strong) UIImageView *imgView;@property (nonatomic,strong) UILabel *lbl;@end@implementation CombProductCell-(instancetype) initWithStyle:(UITableViewCellStyle)style reuseIdentifier:(NSString *)reuseIdentifier{ if(self = [super initWithStyle:style reuseIdentifier:reuseIdentifier]) {_imgView = [[UIImageView alloc]init];_lbl = [[UILabel alloc]init];_lbl.textColor = [UIColor decColorWithRed:46 green:464 blue:46 alpha:1];_lbl.font = [UIFont fontWithName:@'PingFangSC-Regular' size:16.0f];_lbl.textAlignment = NSTextAlignmentLeft;[self addSubview:_imgView];[self addSubview:_lbl];//[self setFrame:CGRectMake(0, 0, DEVICE_WIDTH, 44)]; } return self;}- (void) layoutSubviews{ [_imgView setFrame:CGRectMake(15, 6, ImgLength, ImgLength)]; [_lbl setFrame:CGRectMake(55,13,DEVICE_WIDTH-55-19.5,16)];}主控制器-(void) createRecommendComView{ /*商品组合View组合直接放在ViewController中，位置就在NavigationBar下面，但是在mainScrollView中流出了空白位置 */ //_recommendComView = [[RecommendComView alloc]initWithFrame:CGRectMake(0, NAVIBAR_HEIGHT, DEVICE_WIDTH, TOPBAR_HEIGHT)]; _recommendComView = [[RecommendComView alloc] initWithFrame:CGRectMake(0, NAVIBAR_HEIGHT, DEVICE_WIDTH, TOPBAR_HEIGHT+CELL_HEIGHT*3) style:UITableViewStylePlain]; [self setCombsProductData]; //设置组合_recommendComView页面的tableview的代理 _recommendComView.delegate = self; _recommendComView.dataSource= self; [_recommendComView reloadData]; //添加点击事件 [_recommendComView.unfoldBtn addTarget:self action:@selector(clickedUnFoldCombProductViewBtn) forControlEvents:UIControlEventTouchUpInside]; _foldFlag = TRUE; [self.view addSubview:_recommendComView]; [_recommendComView registerClass:[CombProductCell class] forCellReuseIdentifier:KEY_RECOMMEND_CELL_TABLEVIEW_IDENTIFIER];} #pragma mark:tableView代理和DataSource- (UITableViewCell *)tableView:(UITableView *)tableView cellForRowAtIndexPath:(NSIndexPath *)indexPath{ CombProductCell *cell = [tableView dequeueReusableCellWithIdentifier:KEY_RECOMMEND_CELL_TABLEVIEW_IDENTIFIER]; if(cell==nil) {cell = [[CombProductCell alloc] initWithStyle:UITableViewCellStyleDefault reuseIdentifier:KEY_RECOMMEND_CELL_TABLEVIEW_IDENTIFIER]; } cell.product = _combProuctsArr[indexPath.row]; return cell;}-(CGFloat) tableView:(UITableView *)tableView heightForRowAtIndexPath:(NSIndexPath *)indexPath{ return CELL_HEIGHT;}-(NSInteger) numberOfSectionsInTableView:(UITableView *)tableView{ return 1;}-(NSInteger) tableView:(UITableView *)tableView numberOfRowsInSection:(NSInteger)section{ return _combProuctsArr.count; //return 3;}
问题解答
回答1：发现，在自定义tableview的时候，重写了layoutsubviews,所以导致dataSource方法没有被执行，注释掉layoutsubviews的方法，就可以执行了，但是不知道为什么？解决方法除了注释还有什么？
回答2：重写了layoutsubviews 的时候没调用父类的layoutsubviews吧 [super layoutsubviews]
