Rewrite Async by Objective-C.
For support of iOS 7 and OS X 10.9 check out Async.legacy.OC.
Async sugar looks like this:
Async.background(^{
NSLog(@"A: This is run on the background");
}).main(^{
NSLog(@"B: This is run on the , after the previous block");
});Instead of the familiar syntax for GCD:
dispatch_async(dispatch_get_global_queue(DISPATCH_QUEUE_PRIORITY_BACKGROUND, 0), ^{
NSLog(@"A: This is run on the background");
dispatch_async(dispatch_get_main_queue(), ^{
NSLog(@"B: This is run on the , after the previous block");
});
});Supports the modern queue classes:
Async.main (^{})
Async.userInteractive (^{})
Async.userInitiated (^{})
Async.utility (^{})
Async.background (^{})Chain as many blocks as you want:
Async.userInitiated (^{
// 1
}).main (^{
// 2
}).background (^{
// 3
}).main (^{
// 4
})Instend of `dispatch_after
// After
CGFloat seconds = .5;
NSLog(@"---------------");
Async.after(seconds).main(^{
NSLog(@"Is called after 0.5 seconds");
}).after(.4).background(^{
NSLog(@"At least 0.4 seconds after previous block, and 0.5 after Async code is called");
});Cancel blocks
// Cancel blocks not yet dispatched
AsyncBlock block1 = Async.background(^{
// Heavy work
for (NSUInteger i=0; i < 1000; i++) {
NSLog(@"A %zd",i);
}
});
AsyncBlock block2 = block1.background(^{
NSLog(@"B - shouldn't be reached, since cancelled");
});
Async.main(^{
[block1 cancel];
[block2 cancel];
});