UITableView imageView重用其他單元格的圖像

Question

我需要製作一個UITableView，其中發佈了不同數量的圖像，例如Facebook或Twitter或WeChat朋友。返回動態細胞高度和排列圖像取決於它們的數量。

它應該看起來像這樣

我做動態小區高度圖像：

在HomeTableViewCell.m

使視圖高度自動佈局約束包含後的圖像作爲財產

@property (weak, nonatomic) IBOutlet NSLayoutConstraint *height; 

和它的常數設置爲不同的值，以使細胞動力高度

self.height.constant = imageArray.count > 3 ? 260.0 : imageArray.count == 0 ? 0.0 : 130.0; 

，也爲文本做高度：

- (CGFloat)tableView:(UITableView *)tableView heightForRowAtIndexPath:(NSIndexPath *)indexPath { 
return UITableViewAutomaticDimension; 

}

- (CGFloat)tableView:(UITableView *)tableView estimatedHeightForRowAtIndexPath:(NSIndexPath *)indexPath { 
    HomeTableViewCell *cell = [tableView dequeueReusableCellWithIdentifier:cellIdentifier]; 
    return 130 + cell.height.constant; 
} 

完成後，它的工作原理以及同爲第一張圖片，然後我通過SDWebImage框架加載圖像，我創建了imageCollection中的最大6張圖像

@property (strong, nonatomic) IBOutletCollection(UIImageView) NSArray *imageViewCollection; 

- (void)loadCellDataWithInfo: (SharedUserInfo *)info { 

self.userInfo = info; 
[self.avatarImageView sd_setImageWithURL:[NSURL URLWithString:info.profileImageUrlStr] placeholderImage:[UIImage imageNamed:@"penguinMe"]]; 

self.avatarImageView.layer.cornerRadius = self.avatarImageView.frame.size.width/2.0; 
self.name.text = info.fullName; 
self.username.text = info.userName; 
self.text.text = [info.postDic objectForKey:@"text"]; 
self.likeLabel.text = [NSString stringWithFormat:@"%li", [[info.postDic objectForKey:@"likesCount"]integerValue]]; 
self.commentLabel.text = [NSString stringWithFormat:@"%li", [[info.postDic objectForKey:@"commentsCount"]integerValue]]; 
self.elapsed.text = [info.postDic objectForKey:@"elapsed"]; 

NSArray *imageArray = [info.postDic objectForKey:@"images"]; 

[self loadImagesWithURLStr:imageArray]; 

self.height.constant = imageArray.count > 3 ? 260.0 : imageArray.count == 0 ? 0.0 : 130.0; 

} 

- (void)loadImagesWithURLStr: (NSArray *)urlStrArray { 

switch (urlStrArray.count) { 
    case 0: 
     break; 
    case 4: 
     for (int index = 0; index < urlStrArray.count; index++) { 
      if (index >= 2) { 
       [self.imageViewCollection[index + 1] sd_setImageWithURL:[NSURL URLWithString:urlStrArray[index]]]; 
      } else { 
       [self.imageViewCollection[index] sd_setImageWithURL:[NSURL URLWithString:urlStrArray[index]]]; 
      } 
     } 
     break; 

    default: 
     for (int index = 0; index < urlStrArray.count; index++) { 
      [self.imageViewCollection[index] sd_setImageWithURL:[NSURL URLWithString:urlStrArray[index]]]; 
     } 
     break; 
} 
} 

現在我遇到的問題，有沒有圖像的一些細胞會加載從別的反覆地方一些圖像，似乎只有無任何後期的圖像單元將遇到這樣的問題

細胞確實有圖像效果好，這取決於包含不同數量的圖像URL的圖像數組字符串

最後我所有的重用代碼和單元部分代碼

- (UITableViewCell *)tableView:(UITableView *)tableView cellForRowAtIndexPath:(NSIndexPath *)indexPath { 
HomeTableViewCell *cell = [tableView dequeueReusableCellWithIdentifier:cellIdentifier]; 

[cell loadCellDataWithInfo:self.followingArray[indexPath.row]]; 

return cell; 
} 

- (void)loadCellDataWithInfo: (SharedUserInfo *)info { 

self.userInfo = info; 
[self.avatarImageView sd_setImageWithURL:[NSURL URLWithString:info.profileImageUrlStr] placeholderImage:[UIImage imageNamed:@"penguinMe"]]; 

self.avatarImageView.layer.cornerRadius = self.avatarImageView.frame.size.width/2.0; 
self.name.text = info.fullName; 
self.username.text = info.userName; 
self.text.text = [info.postDic objectForKey:@"text"]; 
self.likeLabel.text = [NSString stringWithFormat:@"%li", [[info.postDic objectForKey:@"likesCount"]integerValue]]; 
self.commentLabel.text = [NSString stringWithFormat:@"%li", [[info.postDic objectForKey:@"commentsCount"]integerValue]]; 
self.elapsed.text = [info.postDic objectForKey:@"elapsed"]; 

NSArray *imageArray = [info.postDic objectForKey:@"images"]; 

[self loadImagesWithURLStr:imageArray]; 

self.height.constant = imageArray.count > 3 ? 260.0 : imageArray.count == 0 ? 0.0 : 130.0; 

} 

所以首先，它與重用imageViewCollection的問題，有什麼建議？讚賞。

Answer 1

您必須使用兩個不同的單元reuseIdentifier。具有圖像的單元（例如cell2）和單元的一個標識符（例如cell1）不具有圖像。所以你必須採取兩個不同的UITableViewCell。

代碼將會像下面：

- (UITableViewCell *)tableView:(UITableView *)tableView cellForRowAtIndexPath:(NSIndexPath *)indexPath { 
if(imagesArr.count == 0) 
{ 
cellIdentifier = @"cell1"; 
} 
else{ 
cellIdentifier = @"cell2"; 
} 
HomeTableViewCell *cell = [tableView dequeueReusableCellWithIdentifier:cellIdentifier]; 


[cell loadCellDataWithInfo:self.followingArray[indexPath.row]]; 

    return cell; 
}