這個是用在vs2015時爆出的問題。
解決方法是：
1.鼠標放置在解決方案中的工程名處，用鼠標右鍵點擊（右擊）。
2.選擇Qt Project Settings，在彈出的對話框中的version欄處填寫本地qt含有的版本號
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