I have a viewcontroller
in a universal
app which has 5 coloumns ( UITableview
). Initially I fetch data from CoreData
and then categorise it in 5 NSArrays
. After that I call all 5 UITableViews
to reload via following code.
[[NSOperationQueue mainQueue] addOperationWithBlock:^{
[_tvLeftMost reloadData];
}];
[[NSOperationQueue mainQueue] addOperationWithBlock:^{
[_tvLeft reloadData];
}];
[[NSOperationQueue mainQueue] addOperationWithBlock:^{
[_tvCenter reloadData];
}];
[[NSOperationQueue mainQueue] addOperationWithBlock:^{
[_tvRight reloadData];
}];
[[NSOperationQueue mainQueue] addOperationWithBlock:^{
[_tvRightMost reloadData];
}];
on both IOS7&8(iPAD3)
the data is fetched in 0.5 secs. But reload tables takes 5 secs on iOS8
and 20+ secs on iOS7
. The UITableView's
cell are not complex and only involve a local UIImage
& a UILabel
. How can I decrease rendering time on iOS7
?
Try to reload your UITableView in below way -
dispatch_async(dispatch_get_main_queue(), ^{
[self.tableView reloadData];
});
If your UITableView load image from web url , then it must be async image loading. Please check this tutorial for async image loading.
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