futurice/mvvm-example-objc

Name: mvvm-example-objc

Owner: Futurice

Description: Example MVVM structure for iOS apps, written in Objective-C

Created: 2016-04-28 16:42:21.0

Updated: 2018-04-18 12:45:31.0

Pushed: 2016-05-06 14:29:51.0

Homepage: null

Size: 663

Language: Objective-C

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README

Instructions

• [ ] Make the failing test pass
• [ ] Add another view (PersonViewController) with its own view model that's initialized with a person
• [ ] Test that the PersonListViewModel creates the correct PersonViewModel
• [ ] Try fetching data from the internet instead (e.g. https://api.myjson.com/bins/nghk, or create your own JSON there)
• [ ] Add some fields to the model, e.g. an NSDate birthdate that must be formatted

Takeaway points

• Better separation between UI and state of the app
• Testing is easier due to cleaner interfaces and dependency injection

Additional material

To fetch data from a JSON backend, you can do something like this in the store:

L *url = [NSURL URLWithString:@"https://api.myjson.com/bins/nghk"];

rn [[[NSURLSession sharedSession] rac_GET:url]
map:^(RACTuple *result) {
    NSData *data = result.first;
    NSArray *peopleArray = [NSJSONSerialization JSONObjectWithData:data options:0 error:NULL];

    NSMutableArray *people = [NSMutableArray array];
    for (NSDictionary *personDict in peopleArray) {
        Person *person = [[Person alloc] initWithFirstName:personDict[@"firstName"] lastName:personDict[@"lastName"]];
        [people addObject:person];
    }

    return [people copy];
}];