检测UISearchBar焦点在文本字段上

Question

有没有办法检测用户是否点击了搜索栏文本字段并且键盘出现了？

Answer 1

从文档中,

• searchBarTextDidBeginEditing:
• searchBarCancelButtonClicked:

Answer 2

如果要实现UISearchBarDelegate,应该调用的第一个方法是:

- (BOOL)searchBarShouldBeginEditing:(UISearchBar *)searchBar {  
    //do stuff
    return YES;  
}  

这是课程参考:

http://developer.apple.com/iphone/library/documentation/UIKit/Reference/UISearchBarDelegate_Protocol/Reference/Reference.html#//apple_ref/occ/intfm/UISearchBarDelegate/searchBarShouldBeginEditing:

Answer 3

您的搜索栏委托应该收到一条 searchBarTextDidBeginEditing: 消息。