Core Image Wrapper URL Playground Problems about functional-swift HOT 7 CLOSED

In 6.1 as tested, it appears to be a playground bug.

Add an assert(image != nil) after you declare your image constant and it will not throw an exception.

I.e. a passing unit test:

func testCIImageOfSunflower() {
    let url = NSURL(string: "http://tinyurl.com/m74sldb")
    let image = CIImage(contentsOfURL: url)
    XCTAssertNotNil(image)
}

You can also observe the image by setting a breakpoint on XCTAssertNotNil(image) and Quick Look image in the debugger you'll see the sunflower.

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Seeing the same error in Xcode 6.1.1. image is nil and adding the assert just produces a failed assertion.

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I can't get this working. Have you reported to Apple so that they can fix the bug?

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Yes, this is only a problem in playgrounds. It worked for a while in OS X playgrounds, but not anymore... It works as expected in real projects though. We've filed a radar.

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Bad publicity as it is the chapter you offer for free download !
You should add a warning to avoid losing potential customers.

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@pierrem Yeah, you're totally right about this. We've added a warning in the sample playground now.

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You could include a project running, like this:
https://github.com/carlosypunto/iOS-Funtional-Wrapping-Core-Image-Sample

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