試圖實現在Xcode 8個β6. UIActivityItemProvider從字符串參數來改變UIActivityType此方法後6 UIActivityItemProvider錯誤,現在出現此錯誤: Method cannot be an @objc override because the type of the parameter 2 cannot be represented in Ob
我的應用程序支持打印。如果用戶取消打印機選項模態視圖控制器,應用程序的某個地方崩潰在蘋果的代碼的_WebTryThreadLock(bool) ... Tried to obtain the web lock from a thread other than the main thread or the web thread. This may be a result of calling to