エラー殴り書き

'AnyObject?' is not convertible to 'String'; did you mean to use 'as!' to force downcast?
キャストはoptionalのキャストはas!で？

Missing condition in an 'if' statement

{}と()を間違い

Could not find an overload for 'stringByAppendingFormat' that accepts the supplied arguments

Extra argument in call

引数が多い