iOS: Log all keys and values from a NSDictionary

ios_logAllKeys.m

-(void)logAllKeys:(NSDictionary *)userInfo
{
    NSArray *allKeys = [userInfo allKeys];
    for (NSString *key in allKeys) {
        id value = [userInfo valueForKey:key];
        NSString *valueString = @"";
        
        if ([value isKindOfClass:[NSString class]])
            valueString = (NSString *)value;
        else if ([value isKindOfClass:[NSNumber class]])
            valueString = [(NSNumber *)value stringValue];
        
        NSLog(@"    %@: %@", key, valueString);
    }
}