objective-c - 从 Objective C 类调用 Swift 方法

Question

我想在 swift 类和 objective-c 类之间创建继承。

swift类创建一个人，objective c类创建一个学生(也是人)

我的敏捷人是:

import Foundation
class person {
var age: Int
var height: Float

init(){
    self.age = 22
    self.heigh =1.80
}

init(age:Int, height:Float){
    self.age=age
    self.height=height
}
}

Objective-c 的学生是:

学生.h:

#import <Foundation/Foundation.h>
#import "Praktikum2a-Swift.h"

@interface student : person

@property (nonatomic) int studentID;

-(void)setStudentID:(int)stdID;

@end

学生.m:

#import <Foundation/Foundation.h>
#import "Praktikum2a-Swift.h"
#import "student.h"

@implementation student

-(id)init{
    return [self initWithStudentID:1337];
}

-(id)initWithStudentID:(int)stdID{
    self=[super init];
    if(self){
        [self setStudentID:stdID];
    }
}

@end

和主要的:

#import <Foundation/Foundation.h>
#import "student.h"

int main(int argc, const char * argv[]) {
    @autoreleasepool {
        student *hugo = [[student alloc] init];

        [hugo setAge: 22 setHeight: 1.80];


        NSLog(@"Hello, World!");
    }
    return 0;
}

项目和包名称是 Praktikum2a

基本上我想不通，为什么我的学生不是人... =/

Answer 1

它在这个页面上说:https://developer.apple.com/library/ios/documentation/swift/conceptual/buildingcocoaapps/MixandMatch.html#//apple_ref/doc/uid/TP40014216-CH10-XID_77

Note that you cannot subclass a Swift class in Objective-C