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#!/usr/bin/python | |
# fix-xcode | |
# Rob Napier <[email protected]> | |
# Script to link in all your old SDKs every time you upgrade Xcode | |
# Create a directory called /SDKs (or modify source_path). | |
# Under it, put all the platform directories: | |
# MacOSX.platform iPhoneOS.platform iPhoneSimulator.platform | |
# Under those, store the SDKs: |
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#import <UIKit/UIKit.h> | |
#import <ImageIO/ImageIO.h> | |
#import <MobileCoreServices/MobileCoreServices.h> | |
static UIImage *frameImage(CGSize size, CGFloat radians) { | |
UIGraphicsBeginImageContextWithOptions(size, YES, 1); { | |
[[UIColor whiteColor] setFill]; | |
UIRectFill(CGRectInfinite); | |
CGContextRef gc = UIGraphicsGetCurrentContext(); | |
CGContextTranslateCTM(gc, size.width / 2, size.height / 2); |
Modern Cocoa development involves a lot of asynchronous programming using blocks and NSOperations. A lot of APIs are exposing blocks and they are more natural to write a lot of logic, so we'll only focus on block-based APIs.
Block-based APIs are hard to use when number of operations grows and dependencies between them become more complicated. In this paper I introduce asynchronous semantics and Promise type to Swift language (borrowing ideas from design of throw-try-catch and optionals). Functions can opt-in to become async, programmer can compose complex logic involving asynchronous operations while compiler produces necessary closures to implement that logic. This proposal does not propose new runtime model, nor "actors" or "coroutines".