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rhoboro/file0.m

Last active September 12, 2015 14:35
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UITableViewから渡されるindexPathをそのままキーにしてはいけない ref: http://qiita.com/rhoboro/items/89e3d1cfe9395effa88d
Raw
file0.m
- (NSInteger)numberOfSectionsInTableView:(UITableView *)tableView {
return 1;
}
- (NSInteger)tableView:(UITableView *)tableView numberOfRowsInSection:(NSInteger)section {
return [self.items count];
}
- (CGFloat)tableView:(UITableView *)tableView estimatedHeightForRowAtIndexPath:(NSIndexPath *)indexPath {
if (![self.heightDic objectForKey:indexPath]) {
// indexPathをキーにしてセルの高さをキャッシュに保存
NSLog(@"S: %ld, R: %ld に30.0をセット", indexPath.section, indexPath.row);
[self.heightDic setObject:@30 forKey:indexPath];
return 30.0f;
}
return 44.0f;
}
- (CGFloat)tableView:(UITableView *)tableView heightForRowAtIndexPath:(NSIndexPath *)indexPath {
return 30.0f;
}
- (UITableViewCell *)tableView:(UITableView *)tableView cellForRowAtIndexPath:(NSIndexPath *)indexPath {
UITableViewCell *cell = [tableView dequeueReusableCellWithIdentifier:@"Cell"];
if (cell == nil) {
[tableView registerClass:[UITableViewCell class] forCellReuseIdentifier:@"Cell"];
cell = [tableView dequeueReusableCellWithIdentifier:@"Cell"];
}
// indexPathをキーにして、キャッシュが取り出せるか否かを確認
if ([self.heightDic objectForKey:indexPath]) {
NSLog(@"S: %ld, R: %ld はキャッシュあり", indexPath.section, indexPath.row);
cell.textLabel.text = @"キャッシュあり";
} else {
NSLog(@"S: %ld, R: %ld はキャッシュなし", indexPath.section, indexPath.row);
cell.textLabel.text = @"キャッシュなし";
}
return cell;
}
Raw
file1.txt
2015-09-12 02:34:17.689 IndexPathBehavior[66159:607] S: 0, R: 0 に30.0をセット
2015-09-12 02:34:17.689 IndexPathBehavior[66159:607] S: 0, R: 1 に30.0をセット
2015-09-12 02:34:17.690 IndexPathBehavior[66159:607] S: 0, R: 2 に30.0をセット
2015-09-12 02:34:17.690 IndexPathBehavior[66159:607] S: 0, R: 3 に30.0をセット
2015-09-12 02:34:17.690 IndexPathBehavior[66159:607] S: 0, R: 4 に30.0をセット
2015-09-12 02:34:17.691 IndexPathBehavior[66159:607] S: 0, R: 5 に30.0をセット
2015-09-12 02:34:17.691 IndexPathBehavior[66159:607] S: 0, R: 6 に30.0をセット
2015-09-12 02:34:17.691 IndexPathBehavior[66159:607] S: 0, R: 7 に30.0をセット
2015-09-12 02:34:17.692 IndexPathBehavior[66159:607] S: 0, R: 8 に30.0をセット
2015-09-12 02:34:17.692 IndexPathBehavior[66159:607] S: 0, R: 9 に30.0をセット
2015-09-12 02:34:17.692 IndexPathBehavior[66159:607] S: 0, R: 10 に30.0をセット
2015-09-12 02:34:17.692 IndexPathBehavior[66159:607] S: 0, R: 11 に30.0をセット
2015-09-12 02:34:17.693 IndexPathBehavior[66159:607] S: 0, R: 12 に30.0をセット
2015-09-12 02:34:17.693 IndexPathBehavior[66159:607] S: 0, R: 13 に30.0をセット
2015-09-12 02:34:17.693 IndexPathBehavior[66159:607] S: 0, R: 14 に30.0をセット
2015-09-12 02:34:17.694 IndexPathBehavior[66159:607] S: 0, R: 15 に30.0をセット
2015-09-12 02:34:17.694 IndexPathBehavior[66159:607] S: 0, R: 16 に30.0をセット
2015-09-12 02:34:17.694 IndexPathBehavior[66159:607] S: 0, R: 17 に30.0をセット
2015-09-12 02:34:17.695 IndexPathBehavior[66159:607] S: 0, R: 18 に30.0をセット
2015-09-12 02:34:17.695 IndexPathBehavior[66159:607] S: 0, R: 19 に30.0をセット
2015-09-12 02:34:17.695 IndexPathBehavior[66159:607] S: 0, R: 20 に30.0をセット
2015-09-12 02:34:17.696 IndexPathBehavior[66159:607] S: 0, R: 21 に30.0をセット
2015-09-12 02:34:17.696 IndexPathBehavior[66159:607] S: 0, R: 22 に30.0をセット
2015-09-12 02:34:17.696 IndexPathBehavior[66159:607] S: 0, R: 23 に30.0をセット
2015-09-12 02:34:17.697 IndexPathBehavior[66159:607] S: 0, R: 24 に30.0をセット
2015-09-12 02:34:17.697 IndexPathBehavior[66159:607] S: 0, R: 25 に30.0をセット
2015-09-12 02:34:17.704 IndexPathBehavior[66159:607] S: 0, R: 26 に30.0をセット
2015-09-12 02:34:17.704 IndexPathBehavior[66159:607] S: 0, R: 27 に30.0をセット
2015-09-12 02:34:17.705 IndexPathBehavior[66159:607] S: 0, R: 28 に30.0をセット
2015-09-12 02:34:17.705 IndexPathBehavior[66159:607] S: 0, R: 29 に30.0をセット
2015-09-12 02:34:17.706 IndexPathBehavior[66159:607] S: 0, R: 0 はキャッシュあり
2015-09-12 02:34:17.707 IndexPathBehavior[66159:607] S: 0, R: 1 はキャッシュあり
2015-09-12 02:34:17.708 IndexPathBehavior[66159:607] S: 0, R: 2 はキャッシュあり
2015-09-12 02:34:17.709 IndexPathBehavior[66159:607] S: 0, R: 3 はキャッシュあり
2015-09-12 02:34:17.709 IndexPathBehavior[66159:607] S: 0, R: 4 はキャッシュあり
2015-09-12 02:34:17.709 IndexPathBehavior[66159:607] S: 0, R: 5 はキャッシュあり
2015-09-12 02:34:17.710 IndexPathBehavior[66159:607] S: 0, R: 6 はキャッシュあり
2015-09-12 02:34:17.710 IndexPathBehavior[66159:607] S: 0, R: 7 はキャッシュあり
2015-09-12 02:34:17.725 IndexPathBehavior[66159:607] S: 0, R: 8 はキャッシュあり
2015-09-12 02:34:17.727 IndexPathBehavior[66159:607] S: 0, R: 9 はキャッシュあり
2015-09-12 02:34:17.728 IndexPathBehavior[66159:607] S: 0, R: 10 はキャッシュあり
2015-09-12 02:34:17.729 IndexPathBehavior[66159:607] S: 0, R: 11 はキャッシュあり
2015-09-12 02:34:17.730 IndexPathBehavior[66159:607] S: 0, R: 12 はキャッシュあり
2015-09-12 02:34:17.731 IndexPathBehavior[66159:607] S: 0, R: 13 はキャッシュあり
2015-09-12 02:34:17.732 IndexPathBehavior[66159:607] S: 0, R: 14 はキャッシュあり
2015-09-12 02:34:17.733 IndexPathBehavior[66159:607] S: 0, R: 15 はキャッシュあり
2015-09-12 02:34:21.369 IndexPathBehavior[66159:607] S: 0, R: 16 はキャッシュあり
2015-09-12 02:34:21.538 IndexPathBehavior[66159:607] S: 0, R: 17 はキャッシュあり
2015-09-12 02:34:21.779 IndexPathBehavior[66159:607] S: 0, R: 18 はキャッシュあり
2015-09-12 02:34:22.138 IndexPathBehavior[66159:607] S: 0, R: 19 はキャッシュあり
2015-09-12 02:34:22.154 IndexPathBehavior[66159:607] S: 0, R: 20 はキャッシュなし
2015-09-12 02:34:22.171 IndexPathBehavior[66159:607] S: 0, R: 21 はキャッシュなし
2015-09-12 02:34:22.188 IndexPathBehavior[66159:607] S: 0, R: 22 はキャッシュなし
2015-09-12 02:34:22.237 IndexPathBehavior[66159:607] S: 0, R: 23 はキャッシュなし
2015-09-12 02:34:22.505 IndexPathBehavior[66159:607] S: 0, R: 24 はキャッシュなし
2015-09-12 02:34:22.573 IndexPathBehavior[66159:607] S: 0, R: 25 はキャッシュなし
2015-09-12 02:34:22.641 IndexPathBehavior[66159:607] S: 0, R: 26 はキャッシュなし
2015-09-12 02:34:23.428 IndexPathBehavior[66159:607] S: 0, R: 27 はキャッシュなし
2015-09-12 02:34:23.554 IndexPathBehavior[66159:607] S: 0, R: 28 はキャッシュなし
2015-09-12 02:34:23.687 IndexPathBehavior[66159:607] S: 0, R: 29 はキャッシュなし
Raw
file2.m
// 受け取ったindexPathと同じ位置を指すNSIndexPathを作成
NSIndexPath *key = [NSIndexPath indexPathForRow:indexPath.row inSection:indexPath.section];
Raw
file3.diff
- (CGFloat)tableView:(UITableView *)tableView estimatedHeightForRowAtIndexPath:(NSIndexPath *)indexPath {
if (![self.heightDic objectForKey:indexPath]) {
NSLog(@"S: %ld, R: %ld に30.0をセット", indexPath.section, indexPath.row);
- [self.heightDic setObject:@30 forKey:indexPath];
+ [self.heightDic setObject:@30 forKey:[indexPath copy]];
return 30.0f;
}
return 44.0f;
}
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