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对于iOS应用程序,我将一些Objective-C代码转换为Swift。在Swift中,如何配置AutoreleasingUnsafeMutablePointer?
Objective-C的代码使用的方法与此签名:
+ (nullable NSArray<MTKMesh*>*)newMeshesFromAsset:(nonnull MDLAsset *)asset
device:(nonnull id<MTLDevice>)device
sourceMeshes:(NSArray<MDLMesh*>* __nullable * __nullable)sourceMeshes
error:(NSError * __nullable * __nullable)error;
这里是它是如何叫:
NSArray<MTKMesh *> *mtkMeshes;
NSArray<MDLMesh *> *mdlMeshes;
mtkMeshes = [MTKMesh newMeshesFromAsset:asset
device:_device
sourceMeshes:&mdlMeshes
error:&error];
我试图将其转换为斯威夫特,我想我做错了,因为方法调用总是失败。
雨燕以上版本的方法:
open class func newMeshes(from asset: MDLAsset, device: MTLDevice, sourceMeshes: AutoreleasingUnsafeMutablePointer<NSArray?>?) throws -> [MTKMesh]
我如何使用它:
do {
var myPointer: AutoreleasingUnsafeMutablePointer<NSArray?>? = nil
myPointer = AutoreleasingUnsafeMutablePointer<NSArray?>.init(&modelIOMeshList)
metalMeshList = try MTKMesh.newMeshes(from:asset, device:device, sourceMeshes: myPointer)
} catch {
fatalError("Error: Can not create Metal mesh from Model I/O asset")
}
的方法应该是填充这两个数组。它不这样做。我在这里错过了什么?