Raise NSError in RubyMotion

Question

I write an application which is basically just client to http API. I am trying to reuse code from Redis Search sample (DataParser and JsonParser), but when error occurs during the API call, RubyMotion is not able to raise that error. It tries to raise first error in error pointer, which is of NSError and raise expects Exception ancestor.

Is there some new way how to treat HTTP errors in RubyMotion projects?

I am not using BW::HTTP since I found it was deprecated.

Received error:

data_parser.rb:7:in `parse:': exception class/object expected (TypeError)

One of codes failing this way:

class DataParser
  def self.parse(url)
    error_ptr = Pointer.new(:object)
    data = NSData.alloc.initWithContentsOfURL(NSURL.URLWithString(url), options:NSDataReadingUncached, error:error_ptr)
    unless data
      NSLog error_ptr[0].inspect
      raise error_ptr[0]
    end
    data
  end
end

score 0 · Answer 1 · answered Jul 31 '16 at 22:40

0

Highly recommended to use AFMotion: https://github.com/clayallsopp/afmotion

answered Jul 31 '16 at 22:40

arashb31

473
6
12

Thank you for recommendation. Unfortunately when I follow the guide ( https://github.com/clayallsopp/AFMotion#install ) to install AFMotion I get an error (Unable to find a specification for `AFMotion`). What do you do differently than how it is in the guide? – Mailo Světel Aug 01 '16 at 22:01
try: gem install afmotion or add it to your Gemfile – arashb31 Aug 02 '16 at 23:20
That's what the guide says and as I mentioned, the guide does not work for me – Mailo Světel Aug 03 '16 at 18:24
Now it works, so I guess some server was just down, ty – Mailo Světel Aug 09 '16 at 20:34

Raise NSError in RubyMotion

1 Answers1