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过去 10 个小时一直在尝试调试崩溃，最后，我将其简化为以下代码：

NSError *error = nil;
NSData *data = [NSData dataWithContentsOfFile:[[NSBundle mainBundle] pathForResource:@"payload" ofType:@"txt"]];
id obj = [NSJSONSerialization JSONObjectWithData:data options:NSJSONReadingMutableContainers error:&error];

使用 NSZombieEnabled，这会使应用程序在第三行（解析发生的位置）崩溃并记录：

*** -[CFString retain]: message sent to deallocated instance 0x758afa0

的内容payload.txt是：

[
   {
      "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
   }
]

它只是一个包含 2 个字典的数组。我不确定是什么导致了这个崩溃/这个 JSON 有什么问题。

更新删除"is_subscribed":0数组中的第一个对象可以消除崩溃。

4

2 回答 2

3

看起来 Apple 在他们的课程中处理此类情况的错误处理方面做得不好，因为你得到了崩溃而不是正常的 nil 结果和错误变量填充。您的 json 数据和简约代码是 Apple 通常需要的正确错误报告。通过以下链接报告错误 - https://developer.apple.com/bugreporter/不要忘记在 zip 中附加项目作为它崩溃的证明。

于 2013-02-16T23:15:12.343 回答
1

我遇到了这个问题，对我来说，问题是 JSON 中的重复键。我的密钥被命名为不同的 - 不是像你的情况那样的“is_subscribed”，而是“food_nutrients”。我敢打赌，iOS 6 会在任何重复的键上崩溃，而两者之间还有另一个键——而不仅仅是一些评论所暗示的“is_subscribed”键。

我已经确认任何名称的重复键都是问题所在。相关：https ://stackoverflow.com/a/21148319/2030

于 2014-01-15T21:08:15.713 回答