message sent to deallocated instance

此應用程序是由一個後臺線程修改佈局的發動機，從而致使發動機的腐敗和怪異的崩潰 ios 轉自：http://translate.baiducontent.com/transpage?query=http%3A%2F%2Fstackoverflow.com%2Fquestions%2F31951704%2Fthis-application-is-modifying-the-autolayout-eng

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