我遇到了AppDelegate缺失的问题。

创建一个最小值解决了这个问题:

import UIKit

@UIApplicationMain
final class AppDelegate: UIResponder,UIApplicationDelegate {
}

我正在使用Xcode 6 GM，我遇到了同样的问题。 我所做的是去构建设置->构建选项(你可以搜索“编译器”)， 然后将“Compiler for C/ c++ /Objective-C”的选项改为默认编译器。

我也有类似的问题。显然我已经包含了信息。Plist从外部项目文件夹。这将导致相同的错误，在每次构建之后都会显示出来(除了我在清理项目后运行它之后)。

为了解决这个问题，我只需要包含信息。从项目文件夹Plist。

我的解决方案是:

在你的终端输入: 打开~ /图书馆/开发/ CoreSimulator /设备/ 删除适当的文件夹 再次编译，它应该工作

产品->清洁(命令shift K)为我修复了它

None of the provided answers worked for me. In my case, I finally fixed the error by updating the target architectures in Build Settings/Architectures/Valid Architectures to $(ARCHS_STANDARD), as arm64 was missing. This was not prohibiting the project to build, although a warning was issued recommending updating the valid architectures, but the "app could not be opened" error was shown at run time. I surmise this error is rather generic and not always linked with a permission issue, but may be displayed when the generated app package is invalid.