主要是在 UISearchDisplayDelegate中更改；

- (void)searchDisplayControllerWillBeginSearch:(UISearchDisplayController *)controller{    [_searchBar setShowsCancelButton:YES animated:NO];    if (kiOS7) {        for (UIView *subView in [[_searchBar.subviews objectAtIndex:0] subviews]){            if([subView isKindOfClass:[UIButton class]]){                [(UIButton*)subView setTitle:@"取消" forState:UIControlStateNormal];            }        }    }    else    {        for (UIView *subView in _searchBar.subviews){            if([subView isKindOfClass:[UIButton class]]){                [(UIButton*)subView setTitle:@"取消" forState:UIControlStateNormal];            }        }    }        }

以上代码是ios7 下 和ios 7 之前的两个版本设置

 

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