在滚动时，滚动表格有点不稳定和断断续续。
我能做些什么改进才能让它顺利进行？
这是我的cellForRowAtIndexPath
- (UITableViewCell *)tableView:(UITableView *)tableView cellForRowAtIndexPath:(NSIndexPath *)indexPath object:(PFObject *)object {
UITableViewCell *cellEmpty;
if ([tableView isEqual:self.categoryTableView]) {
NSString *CellIdentifierCategory = @"categoryCell";
UITableViewCell *categoryCell = [self.categoryTableView dequeueReusableCellWithIdentifier:CellIdentifierCategory];
if (categoryCell == nil) {
categoryCell = [[UITableViewCell alloc]initWithStyle:UITableViewCellStyleSubtitle reuseIdentifier:CellIdentifierCategory];
}
else{
categoryCell.textLabel.text = [_categoryTableArray objectAtIndex:indexPath.row];
return categoryCell;
}
}
if ([tableView isEqual:self.tableView]) {
if (indexPath.section == self.objects.count) {
UITableViewCell *cell = [self tableView:tableView cellForNextPageAtIndexPath:indexPath];
UILabel *loadLabel = (UILabel *)[cell viewWithTag:1];
if (!self.isLoading) {
loadLabel.text = @"The End of Space";
self.tableView.tableFooterView = nil;
}
cell.userInteractionEnabled = NO;
return cell;
}
NSString *CellIdentifier = @"PhotoCell";
InterestsCell *cell = [tableView dequeueReusableCellWithIdentifier:CellIdentifier];
if (cell == nil) {
cell = [[InterestsCell alloc]initWithStyle:UITableViewCellStyleSubtitle reuseIdentifier:CellIdentifier];
}
else{
PFUser *user = [object objectForKey:@"userTookPhoto"];
dispatch_async(dispatch_get_main_queue(), ^{
cell.companyLogo.layer.cornerRadius = cell.companyLogo.frame.size.width / 2;
cell.companyLogo.clipsToBounds = YES;
});
[cell.productImageView setUserInteractionEnabled:YES];
[cell.priceLabel setUserInteractionEnabled:YES];
UITapGestureRecognizer *tapForImage = [[UITapGestureRecognizer alloc] initWithTarget:self action:@selector(handleProductImageTap:)];
tapForImage.cancelsTouchesInView = YES;
tapForImage.numberOfTapsRequired = 1;
[cell.productImageView addGestureRecognizer:tapForImage];
UITapGestureRecognizer *tapForPrice = [[UITapGestureRecognizer alloc] initWithTarget:self action:@selector(handleProductImageTap:)];
tapForPrice.cancelsTouchesInView = YES;
tapForPrice.numberOfTapsRequired = 1;
[cell.priceLabel addGestureRecognizer:tapForPrice];
cell.productImageView.tag = indexPath.section;
cell.productImageView.file = (PFFile *)object[@"image"];
[cell.productImageView loadInBackground:^(UIImage * _Nullable image, NSError * _Nullable error) {
} progressBlock:^(int percentDone) {
NSLog(@"float value: %f",percentDone * 0.01);
dispatch_async(dispatch_get_main_queue(), ^{
[cell.progressView setProgress:percentDone * 0.01 animated:YES];
});
if (percentDone == 100) {
[cell.progressView setHidden:YES];
}
}];
dispatch_async(dispatch_get_main_queue(), ^{
cell.productTitle.text = object[@"titleOfPhoto"];
});
[cell.companyLogo setUserInteractionEnabled:YES];
UITapGestureRecognizer *tapGesture1 = [[UITapGestureRecognizer alloc] initWithTarget:self action:@selector(segueCompanyProfile)];
tapGesture1.numberOfTapsRequired = 1;
[cell.companyLogo addGestureRecognizer:tapGesture1];
if (user[@"profileImage"]) {
cell.companyLogo.file = (PFFile *)user[@"profileImage"];
[cell.companyLogo loadInBackground];
}
else{
dispatch_async(dispatch_get_main_queue(), ^{
UIImage *image = [UIImage imageNamed:@"defaultBrandLogo.png"];
cell.companyLogo.image = image;
});
}
dispatch_async(dispatch_get_main_queue(), ^{
[cell.companyLabelButton setTitle:user.username forState:UIControlStateNormal];
cell.companyLabelButton.contentHorizontalAlignment = UIControlContentHorizontalAlignmentLeft;
cell.companyLabelButton.contentEdgeInsets = UIEdgeInsetsMake(0, 0, 0, 0);
});
[cell.companyLabelButton addTarget:self action:@selector(segueCompanyProfile) forControlEvents:UIControlEventTouchUpInside];
NSNumber *price = object[@"PriceOfPhoto"];
NSNumberFormatter *numberFormatter = [[NSNumberFormatter alloc] init];
[numberFormatter setNumberStyle: NSNumberFormatterCurrencyStyle];
NSString *numberAsString = [numberFormatter stringFromNumber:price];
NSString *priceLabelText = [NSString stringWithFormat:@"%@",numberAsString];
dispatch_async(dispatch_get_main_queue(), ^{
cell.priceLabel.text = priceLabelText;
});
// UIView *line = [[UIView alloc] initWithFrame:CGRectMake(0, cell.productTitle.frame.origin.y + cell.productTitle.frame.size.height + 10, self.view.frame.size.width - 30, 2)];
// line.backgroundColor = [UIColor groupTableViewBackgroundColor];
// [cell.cardView addSubview:line];
cell.likeButtonOutlet.delegate = self;
cell.likeButtonOutlet.sectionIndex = indexPath.section;
NSArray *likesArray = object[@"likesBy"];
if (likesArray.count > 0) {
NSNumberFormatter *formatter = [[NSNumberFormatter alloc] init];
NSString *groupingSeparator = [[NSLocale currentLocale] objectForKey:NSLocaleGroupingSeparator];
[formatter setGroupingSeparator:groupingSeparator];
[formatter setGroupingSize:3];
[formatter setAlwaysShowsDecimalSeparator:NO];
[formatter setUsesGroupingSeparator:YES];
NSString *formattedString = [formatter stringFromNumber:[NSNumber numberWithFloat:likesArray.count]];
dispatch_async(dispatch_get_main_queue(), ^{
cell.likeCountLabel.text = formattedString;
});
}
else{
dispatch_async(dispatch_get_main_queue(), ^{
cell.likeCountLabel.text = nil;
});
}
if (likesArray.count > 0) {
for (NSString *likes in likesArray) {
if ([likes isEqualToString:[PFUser currentUser].objectId]) {
dispatch_async(dispatch_get_main_queue(), ^{
[cell.likeButtonOutlet setSelected:YES];
});
}
else{
dispatch_async(dispatch_get_main_queue(), ^{
[cell.likeButtonOutlet setSelected:NO];
});
}
}
}
else{
dispatch_async(dispatch_get_main_queue(), ^{
[cell.likeButtonOutlet setSelected:NO];
});
}
}
return cell;
}
return cellEmpty;
}