Obj c to swift converter install#
Make sure you have Node installed, and then npm install -g obj23dtiles Please use Cesium after v1.37, cause this 3d tile use glTF2.0. Node command line tool and module convert obj model file to 3D Tiles, based on obj2gltf. person.m #import "person.WARNING: THIS REPO IS NO LONGER MAINTANING, MAYBE NOT SUPPORT NEWERST CESIUM. In Obj-C, since most of our classes inherit from NSObject base class, we are most likely overriding its constructor method. Obj-C’s methods are imported to Swift this way: // Obj-C // Method signature - (UIImage *)resizedImageWithContentMode:(UIViewContentMode)contentMode bounds: (CGSize)bounds interpolationQuality: (CGInterpolationQuality)quality Assigning Default Propertyĭefault properties could be initialized within the constructor init method. Obj-C message2] // Swift obj.method() obj.method1().method2() sending a message to a delegate makes more sense than calling a method on a delegate to do something). And this analogy is also very helpful when developing iOS (i.e. However, in Obj-C-speak, it’s sending messages. Be clear that “sending a message to” and “calling a method on” mean the same thing. However, in Swift you do it just like in many other languages with dot notation. Using let should be less expensive than var, and thus should be used whenever it’s viable. Swift’s let keyword is used to define a constant (immutable) and var to define regular variables. var arr2 = arr2 = "last" // The last member of arr2 is changed to "last" Obj-C NSArray *arr = arr = // This gives compile error // Swift let arr1 = arr = "last" // This gives error because arr is constant. Unlike Obj-C, arrays in Swift (as well as dictionaries) are mutable. Also, there isn’t a NSNumber to wrap around all types of numbers or a NSDictionary to handle dictionaries with arbitrary types in Swift, but we can borrow NS- types from Obj-C since they both are interoperable. Therefore, arrays and dictionaries are strongly-typed.
Swift is more strict about types than Obj-C. Obj-C has a convention of treating (almost) everything as raw pointer to object, (thus the * and and only primitive types like integers and characters are treated as real values. Since most of Obj-C objects are treated as raw pointers, Swift handle pointers in the background so users won’t have to think about them.Ĭompare defining variables in two languages: // Obj-C NSString *aString = NSInteger aInt = 20 BOOL *aBool = YES NSNumber *aNum = NSArray *aArray = NSDictionary *aDict = // Swift let aString: String = "Odelay!" let aInt: Int = 20 let aBool: Bool = true let aNum: NSNumber = 3.14 let aArray: = let aDict: = // or do type inference let aString = "Odelay!" Swift has no * and to indicate objects and pointers. Also, most types are prepended by NS which stands for NeXTSTEP, the OS predating OS X and iOS.
For instance, you will find methods like stringByAppendingString: which you can make sense right away upon reading and other higher-level object types such as strings, arrays, dictionaries are always appended with a * and the values prepended with a to explicitly tell you that they are pointers and addresses. Obj-C seems like a prehistoric attempt to simplify C and make it more “objective,” sacrificing conciseness for verbosity and clarity in words. This is how we would print a string in Obj-C compared to Swift. And what I’ve discovered is that learning Obj-C had made learning Swift much more enjoyable. So here I am, learning Obj-C as I convert its verbose APIs to Swift’s. Swift is a new language on the horizon, and I haven’t had much luck searching for an elaborate migration guide online except from two excellent iBooks from Apple, which you can check out on iTune. Cocoa frameworks are still in Obj-C, and to develop in Swift you will need to understand the quirks and nuisances coming from Obj-C to a certain point. However, developing on iOS in it without a slight knowledge of Obj-C does not necessary. Swift does make sense on its own and is a very neat and concise language which reminds me of Go, a concise, script-like statically-typed language from Google. If any of you are excited about Apple’s new language Swift as I was and thinking it’s your new savior from Obj-C, I’ll have to say it is not that simple.
Obj c to swift converter code#
I’ve been working on an outdated iOS Objective-C code with tons of deprecated methods which isn’t working on the latest version of iOS, so I might as well rewrite most of it in Swift for the sake of learning both languages, and here’s the summary of what I’ve learned.
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