Detect UISearchBar focus on the text field

问题

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

回答1:

From the docs,

• searchBarTextDidBeginEditing:
• searchBarCancelButtonClicked:

回答2:

If you are implementing UISearchBarDelegate, the first method that should be called is:

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

Here's the class reference:

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

回答3:

Your searchbar delegate should receive a searchBarTextDidBeginEditing: message.

来源：https://stackoverflow.com/questions/2095909/detect-uisearchbar-focus-on-the-text-field