過去10時間クラッシュをデバッグしようとしていて、最後に、次のコードに簡略化しました。
NSError *error = nil;
NSData *data = [NSData dataWithContentsOfFile:[[NSBundle mainBundle] pathForResource:@"payload" ofType:@"txt"]];
id obj = [NSJSONSerialization JSONObjectWithData:data options:NSJSONReadingMutableContainers error:&error];
NSZombieEnabledを使用すると、3行目(解析が行われる場所)でアプリがクラッシュし、次のログが記録されます。
*** -[CFString retain]: message sent to deallocated instance 0x758afa0
内容は次のpayload.txt
とおりです。
[
{
"created_at":"2013-02-15T23:46:02-05:00",
"description":"Take out the Big Gun sounded simple enough, except the Strogg were waiting. You, and a few marines like you, are the lucky ones. You've made it down in one piece and are still able to contact the fleet. The Gravity Well, the Strogg's newest weapon in its arsenal against mankind, is operational. With the fleet around Stroggos, 5% of ground forces surviving, and that number dwindling by the second, your orders have changed: free your comrades. Destroy the Gravity Well.Minimum: A 100% Windows XP/Vista-compatible computer system",
"developer":"id Software",
"external_id":"2340",
"id":745,
"image":"http://cdn.steampowered.com/v/gfx/apps/2340/header_292x136.jpg",
"is_subscribed":0,
"link":"http://store.steampowered.com/app/2340/",
"price":"4.99",
"seller_id":2,
"thumb":"http://media.steampowered.com/steamcommunity/public/images/apps/2340/5bd6e22ffdf72fdfb5ce2092fa50150de5fbb56f.jpg",
"title":"Quake II: Ground Zero",
"updated_at":"2013-02-15T23:46:02-05:00",
"is_subscribed":0
},
{
"created_at":"2013-02-15T23:45:59-05:00",
"description":"Rage through 32 single player levels and 6 deathmatch levels of sheer terror and fully immersive sound and lighting. Arm yourself against the cannibalistic Ogre, fiendish Vore and indestructible Schambler using lethal nails, fierce Thunderbolts and abominable Rocket and Grenade Launchers.Minimum: A 100% Windows XP/Vista-compatible computer system",
"developer":"id Software",
"external_id":"2310",
"id":742,
"image":"http://cdn.steampowered.com/v/gfx/apps/2310/header_292x136.jpg",
"is_subscribed":0,
"link":"http://store.steampowered.com/app/2310/",
"price":"9.99",
"seller_id":2,
"thumb":"http://media.steampowered.com/steamcommunity/public/images/apps/2310/e5bdf8dc7759c573fe525d45b69011f6a173a984.jpg",
"title":"Quake",
"updated_at":"2013-02-15T23:45:59-05:00",
"is_subscribed":0
}
]
これは、2つの辞書の配列にすぎません。このクラッシュの原因/このJSONの何が問題になっているのかわかりません。
UPDATE配列の最初のオブジェクトを削除"is_subscribed":0
すると、クラッシュが解消されます。