试图实现在Xcode 8个β6. UIActivityItemProvider从字符串参数来改变UIActivityType此方法后6 UIActivityItemProvider错误,现在出现此错误: Method cannot be an @objc override because the type of the parameter 2 cannot be represented in Ob
我的应用程序支持打印。如果用户取消打印机选项模态视图控制器,应用程序的某个地方崩溃在苹果的代码的_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