Examples

Creating a deferred object and returning its promise

KSDeferred *deferred = [KSDeferred defer];
return deferred.promise;

Adding callback to the promise

[promise then:^id(id value) {
    .. do something ..
    return value;
  } error:^id(NSError *e) {
    .. handle error ..
    return e;
}];

Chaining promises

KSPromise *chained = [promise then:^id(id value) {
    return value;
} error:^id(NSError *e) {
    return e;
}];

[chained then:^id(id value) {
    # value is value returned from first promise
} error:^id(NSError *e) {
    # error is error returned from first promise
}];

Resolving a promise

[deferred resolveWithValue:@"VALUE"];

Rejecting a promise

NSError *someError;
[deferred rejectWithError:someError];

Author

Kurtis Seebaldt, Pivotal Labs

toddlee/deferred

Examples

Creating a deferred object and returning its promise

Adding callback to the promise

Chaining promises

Resolving a promise

Rejecting a promise

Author