关于iOS修改SearchBar上Cancel文字颜色

//显示Cancel按钮

_searchBar.showsCancelButton = YES;

//设置Cancel按钮颜色

[[UIBarButtonItem appearanceWhenContainedIn:[UISearchBar class], nil] setTitleTextAttributes:[NSDictionary dictionaryWithObjectsAndKeys:[UIColor whiteColor],NSForegroundColorAttributeName,[NSValue valueWithUIOffset:UIOffsetMake(0, 1)],NSForegroundColorAttributeName,nil] forState:UIControlStateNormal];