QT錯誤之——collect2:ld returned 1 exit status
通過自己的錯誤積累和網上的相關資料，簡單的總結了一下出現這種錯誤常見的情況：
1.編譯成功的例子在後臺執行，有時一閃而過，如果再次build ，則會提示上述錯誤。
解決方法：開啟工作管理員，找到相應的exe程式，關閉即可； 或者直接關閉QtCreator。
2.沒有編譯成功的情況下，最常見情況是程式本身需要include的標頭檔案被遺漏了
解決方法：細心查詢基類所用的標頭檔案，include之後即可。
3..h檔案中相關的槽函式在cpp檔案中沒有定義
解決方法：查詢遺漏的槽函式，根據需要，具體的定義。
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