如何将此代码从Swift转换为Objective C

Question

private var distance: Double {
    return fabs(max - min)
}

如何用Objective C语言定义此变量。

Answer 1

在您的.m文件中：

@interface MyClass ()
@property (nonatomic, assign, readonly) double distance;
@end

@implementation MyClass

-(double)distance {
    return fabs(max - min);
}

@end