Modern development is highly asynchronous: isn’t it about time we had tools that made programming asynchronously powerful, easy and delightful?

UIApplication.sharedApplication().networkActivityIndicatorVisible = true

when(fetchImage(), getLocation()).then { image, location in
    self.imageView.image = image;
    self.label.text = "Buy your cat a house in \(location)"
}.finally {
    UIApplication.sharedApplication().networkActivityIndicatorVisible = false
}.catch { error in
    UIAlertView(…).show()
}

• Check out the complete, comprehensive PromiseKit documentation.
• Read the API documentation.
• Integrate promises into your existing projects.

use_frameworks!

pod "PromiseKit", "~> 2.0"

github "mxcl/PromiseKit" ~> 2.0

Coming soon!

Please Note If you want a standalone download because you don’t want to learn CocoaPods or Carthage then may we ask you to reconsider? If you choose to use third-party libraries you should also choose to install bug fix releases, some of the fixes can be very important! Using a dependency manager takes the headache out of staying up-to-date.

Neither CocoaPods or Carthage will install iOS frameworks for deployment targets below iOS 8. PromiseKit 2 is an iOS framework. If you need previous iOS versions then you need to do one of:

1. pod "PromiseKit", "~> 1.5" †‡
2. Manually compile all the PromiseKit sources into your app target.
3. Download our pre-built static framework (coming soon!)

† There is no Swift support with PromiseKit 1.x installed via CocoaPods.

‡ PromiseKit 1.x will work as far back as iOS 5 if required.

PromiseKit is hundreds of hours of work almost completely by just me: Max Howell. I thoroughly enjoyed making PromiseKit, but nevertheless if you have found it useful then your bitcoin will give me a warm fuzzy feeling from my head right down to my toes: 1JDbV5zuym3jFw4kBCc5Z758maUD8e4dKR.

Copyright 2015 Max Howell [email protected]

Permission is hereby granted, free of charge, to any person obtaining a copy of this software and associated documentation files (the "Software"), to deal in the Software without restriction, including without limitation the rights to use, copy, modify, merge, publish, distribute, sublicense, and/or sell copies of the Software, and to permit persons to whom the Software is furnished to do so, subject to the following conditions:

The above copyright notice and this permission notice shall be included in all copies or substantial portions of the Software.

THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.