ここで何が起こっているのかわかりません。
各セルにいくつかのサブビューが含まれている UITableView があり、すべて正常に動作します。残念ながら、パフォーマンスは恐ろしく、スクロールは途切れ途切れです。UITableViewCell をサブクラス化してパフォーマンスを向上させることができるかもしれないと読みましたが、その方法や問題を解決する別のソリューションを実装する方法についてはわかりません。以下の tableView のデリゲート メソッドを投稿しました。
- (UITableViewCell *)tableView:(UITableView *)tableView
cellForRowAtIndexPath:(NSIndexPath *)indexPath {
static NSString *CellIdentifier = @"Cell";
UIImageView* imageView;
UILabel* ttitle;
UILabel* ttitle2;
UILabel* ttitle3;
UITableViewCell *cell = [tableView dequeueReusableCellWithIdentifier:CellIdentifier];
if (cell == nil) {
cell = [[[UITableViewCell alloc] initWithStyle:UITableViewCellStyleDefault reuseIdentifier:CellIdentifier] autorelease];
// Configure cell:
// *** This section should configure the cell to a state independent of
// whatever row or section the cell is in, since it is only executed
// once when the cell is first created.
imageView=[[UIImageView alloc]initWithFrame:CGRectMake(10.0, 11.0, 50.0, 50.0)];
[imageView setContentMode:UIViewContentModeScaleAspectFill];
imageView.layer.masksToBounds=YES;
imageView.layer.cornerRadius=5.0;
imageView.tag=1;
[cell.contentView addSubview:imageView];
ttitle = [[[UILabel alloc] initWithFrame:CGRectMake(70.0, 7.0, 200, 20)] autorelease];
ttitle.textColor= [UIColor blackColor];
ttitle.numberOfLines=1;
ttitle.tag=69;
ttitle.backgroundColor=[UIColor clearColor];
ttitle.font=[UIFont fontWithName:@"Arial Bold" size:15.0];
[cell.contentView addSubview:ttitle];
if (indexPath.row==0) {
CGSize size=[[[data objectAtIndex:indexPath.row] valueForKey:@"content"] sizeWithFont:[UIFont systemFontOfSize:14.0f] constrainedToSize:CGSizeMake(265.0f, CGFLOAT_MAX) lineBreakMode:NSLineBreakByWordWrapping];
ttitle2 = [[[UILabel alloc] initWithFrame:CGRectMake(70.0, 27.5, 200, size.height)] autorelease];
ttitle2.textColor= [UIColor darkGrayColor];
ttitle2.backgroundColor=[UIColor clearColor];
ttitle2.numberOfLines=0;
ttitle2.tag=70;
ttitle2.textAlignment = NSTextAlignmentLeft;
ttitle2.lineBreakMode=NSLineBreakByWordWrapping;
ttitle2.font=[UIFont fontWithName:@"Arial" size:14.0];
[cell.contentView addSubview:ttitle2];
ttitle3 = [[[UILabel alloc] initWithFrame:CGRectMake(70.0, ttitle2.frame.origin.y+ttitle2.frame.size.height-8.0, 210, 40)] autorelease];
ttitle3.textColor= [UIColor darkGrayColor];
ttitle3.backgroundColor=[UIColor clearColor];
ttitle3.numberOfLines=1;
ttitle3.tag=71;
ttitle3.textAlignment = NSTextAlignmentLeft;
ttitle3.lineBreakMode=NSLineBreakByWordWrapping;
ttitle3.font=[UIFont fontWithName:@"Arial" size:11.0];
[cell.contentView addSubview:ttitle3];
}
else{
CGSize size=[[[data objectAtIndex:indexPath.row] valueForKey:@"content"] sizeWithFont:[UIFont systemFontOfSize:14.0f] constrainedToSize:CGSizeMake(265.0f, CGFLOAT_MAX) lineBreakMode:NSLineBreakByWordWrapping];
ttitle2 = [[[UILabel alloc] initWithFrame:CGRectMake(70.0, 27.0, 200, size.height)] autorelease];
ttitle2.textColor= [UIColor darkGrayColor];
ttitle2.backgroundColor=[UIColor clearColor];
ttitle2.numberOfLines=0;
ttitle2.tag=70;
ttitle2.textAlignment = NSTextAlignmentLeft;
ttitle2.lineBreakMode=NSLineBreakByWordWrapping;
ttitle2.font=[UIFont fontWithName:@"Arial" size:14.0];
[cell.contentView addSubview:ttitle2];
ttitle3 = [[[UILabel alloc] initWithFrame:CGRectMake(70.0, ttitle2.frame.origin.y+ttitle2.frame.size.height-9.0, 210, 40)] autorelease];
ttitle3.textColor= [UIColor darkGrayColor];
ttitle3.backgroundColor=[UIColor clearColor];
ttitle3.numberOfLines=1;
ttitle3.tag=71;
ttitle3.textAlignment = NSTextAlignmentLeft;
ttitle3.lineBreakMode=NSLineBreakByWordWrapping;
ttitle3.font=[UIFont fontWithName:@"Arial" size:11.0];
[cell.contentView addSubview:ttitle3];
}
}
else {
imageView = (UIImageView *) [cell viewWithTag:1];
ttitle=( UILabel *) [cell viewWithTag:69];
ttitle2=( UILabel *) [cell viewWithTag:70];
ttitle3=( UILabel *) [cell viewWithTag:71];
}
//STUFFOUTSIDE
// Customize cell:
// *** This section should customize the cell depending on what row or section
// is passed in indexPath, since this is executed every time this delegate method
// is called.
imageView.image=[UIImage imageWithData:[NSData dataWithContentsOfURL:[NSURL URLWithString:[[data objectAtIndex:indexPath.row] valueForKey:@"thumbnail"]]]];
[ttitle setText:[[data objectAtIndex:indexPath.row] valueForKey:@"name"]];
[ttitle2 setText:[[data objectAtIndex:indexPath.row] valueForKey:@"content"]];
NSString* first=[[[data objectAtIndex:indexPath.row] valueForKey:@"hashtag"] stringByAppendingString:@" "];
NSString* second =[first stringByAppendingString:[[data objectAtIndex:indexPath.row] valueForKey:@"place"]];
NSString* third=[second stringByAppendingString:@" "];
NSString* fourth=[third stringByAppendingString:@"¤ "];
NSString* conversion=[[[data objectAtIndex:indexPath.row] valueForKey:@"counter"] stringValue];
NSString* fifth=[fourth stringByAppendingString:conversion];
[ttitle3 setText:fifth];
return cell;
}