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Jonathan Lehr


Jonathan is an expert in Objective-C and Swift programming, with well over a decade's experience with Apple's Cocoa frameworks, including hands-on software development on NEXTSTEP, OpenStep, OS X, and iOS. Jonathan has trained hundreds of iOS developers, and he's the author of several books and over a dozen courses on related topics.


Jonathan's classes have garnered rave reviews from organizations such as Apple, Wells Fargo, NASA, Verisign, eBay, Lockheed Martin, and IBM. He's also a sought-after speaker at user group meetings and conferences.


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