@property(nonatomic,retain) UIBarButtonItem *backBarButtonItem; // Bar button item to use for the back button in the child navigation item. 通过更改自己的backBarButtonItem属性,可以更改后退到自己的back按钮的文字,请注意从A推入B,更改的是A view 的属性,不是B view 的! UIBarButtonItem的创建不需要指定其他函数
看来从版本3.3.1基本上已经支持线程句柄的传递功能.具体限制我标记了一下.(6) Is SQLite threadsafe?SQLite is threadsafe. We make this concession since many users choose to ignore the advice given in the previous paragraph. But in order to be thread-safe, SQLite must be compiled with th