-[NSString containsString:] although very convenient is only available in iOS 8 or OS X 10.10.
If you maintain support for iOS 7, you should use -[NSString rangeOfString:]
if ([string containsString:substring]) {}
can be replaced by :
if ([string rangeOfString:substring].location != NSNotFound) {}
-[NSString containsString:] although very convenient is only available in iOS 8 or OS X 10.10. If you maintain support for iOS 7, you should use -[NSString rangeOfString:]
if ([string containsString:substring]) {}
can be replaced by :
if ([string rangeOfString:substring].location != NSNotFound) {}