iphone - Detect UISearchBar focus on the text field

Question

Is there a way to detect if a user has click on the searchbar textfield and the keyboard has appear ?

Answer 1

从文档中，

• searchBarTextDidBeginEditing:
• searchBarCancelButtonClicked:

Answer 2

如果您正在实现 UISearchBarDelegate，则应调用的第一个方法是：

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

这是类参考：

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

Answer 3

Your searchbar delegate should receive a searchBarTextDidBeginEditing: message.