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ASTableView batch API and context object

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This commit is contained in:
Ryan Nystrom
2015-02-04 11:44:17 -08:00
parent caf168a6a5
commit 09ade3dd00
6 changed files with 258 additions and 9 deletions
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55
examples/Kittens/Sample/ViewController.m
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@@ -17,8 +17,10 @@
#import "BlurbNode.h"
#import "KittenNode.h"
static const NSInteger kLitterSize = 200;
static const NSInteger kLitterSize = 20;
static const NSInteger kLitterBatchSize = 10;
static const NSInteger kMaxLitterSize = 100;
@interface ViewController () <ASTableViewDataSource, ASTableViewDelegate>
{
@@ -52,17 +54,23 @@ static const NSInteger kLitterSize = 200;
_tableView.asyncDelegate = self;
// populate our "data source" with some random kittens
NSMutableArray *kittenDataSource = [NSMutableArray arrayWithCapacity:kLitterSize];
_kittenDataSource = [self createLitterWithSize:kLitterSize];;
return self;
}
- (NSArray *)createLitterWithSize:(NSInteger)litterSize
{
NSMutableArray *kittens = [NSMutableArray arrayWithCapacity:litterSize];
for (NSInteger i = 0; i < kLitterSize; i++) {
u_int32_t deltaX = arc4random_uniform(10) - 5;
u_int32_t deltaY = arc4random_uniform(10) - 5;
CGSize size = CGSizeMake(350 + 2 * deltaX, 350 + 4 * deltaY);
[kittenDataSource addObject:[NSValue valueWithCGSize:size]];
[kittens addObject:[NSValue valueWithCGSize:size]];
}
_kittenDataSource = kittenDataSource;
return self;
return kittens;
}
- (void)setKittenDataSource:(NSArray *)kittenDataSource {
@@ -117,12 +125,43 @@ static const NSInteger kLitterSize = 200;
return NO;
}
- (void)tableViewLockDataSource:(ASTableView *)tableView {
- (void)tableViewLockDataSource:(ASTableView *)tableView
{
self.dataSourceLocked = YES;
}
- (void)tableViewUnlockDataSource:(ASTableView *)tableView {
- (void)tableViewUnlockDataSource:(ASTableView *)tableView
{
self.dataSourceLocked = NO;
}
- (BOOL)shouldBatchFetchForTableView:(UITableView *)tableView
{
return _kittenDataSource.count < kMaxLitterSize;
}
- (void)tableView:(UITableView *)tableView beginBatchFetchingWithContext:(ASBatchContext *)context
{
NSLog(@"adding kitties");
dispatch_async(dispatch_get_global_queue(DISPATCH_QUEUE_PRIORITY_DEFAULT, 0), ^{
sleep(1);
dispatch_async(dispatch_get_main_queue(), ^{
NSArray *moarKittens = [self createLitterWithSize:kLitterBatchSize];
NSMutableArray *indexPaths = [[NSMutableArray alloc] init];
NSInteger existingKittens = _kittenDataSource.count;
for (NSInteger i = 0; i < moarKittens.count; i++) {
[indexPaths addObject:[NSIndexPath indexPathForRow:existingKittens + i inSection:0]];
}
_kittenDataSource = [_kittenDataSource arrayByAddingObjectsFromArray:moarKittens];
[tableView insertRowsAtIndexPaths:indexPaths withRowAnimation:UITableViewRowAnimationFade];
[context completeBatchFetching:YES];
NSLog(@"kittens added");
});
});
}
@end