这个是因为发送消息的对象已经被dealloc了,然后再次发送[release]请求就不行了.所以可以retain或者alloc对象 if (self.buttonsList) { for (int index = 0; index < 9; index ++) { UIButton *button = [[UIButton alloc]init]; button.backgroundColor =…
本文转载至 http://blog.sina.com.cn/s/blog_a843a8850101ds8j.html (一).关于nil http://cocoadevcentral.com/d/learn_objectivec/ Calling Methods on Nil In Objective-C, the nil object is the functional equivalent to the NULLpointer in many other languages. The d…
Introduction: Building modern HTTP/RESTful/RPC services has become very easy with the new ASP.NET Web API framework. Using ASP.NET Web API framework, you can create HTTP services which can be accessed from browsers, machines, mobile devices a…
Check SMTP Server Availability for ORA-29278 or ORA-29279 errors using UTL_SMTP to Send Email. (文档 ID 604763.1) 转到底部 修改时间:2014-5-13类型:PROBLEM 为此文档评级 通过电子邮件发送此文档的链接 在新窗口中打开文档 In this Document Symptoms Cause Solution References APPLIES TO: PL/S…
Appendix B. Error Codes and MessagesTable of Contents B.1. Server Error Codes and MessagesB.2. Client Error Codes and MessagesThis appendix lists the errors that may appear when you call MySQL from any host language. The first list displays server er…
