在xcode中，当我打开。xib文件中文本字段的十进制键盘选项时，我运行应用程序，我收到这个错误:
Jun 13 01:22:38 Nicholas-Gibsons-iPhone Quick Utilities[1009] <Error>:
CGContextSetFillColorWithColor: invalid context 0x0. This is a serious error. This
application, or a library it uses, is using an invalid context and is thereby
contributing to an overall degradation of system stability and reliability. This notice is
a courtesy: please fix this problem. It will become a fatal error in an upcoming update.
如果你知道这到底是什么意思，你会有很大的帮助!非常感谢!
尝试以下操作:
textField.keyboardType = UIKeyboardTypeDecimalPad;
检查您是否在任何地方使用上下文 -如果是，则在任何地方重新命名它。