ios – 如何在目标c中覆盖超类中的私有方法和属性

使用来自 cocoapods的库,我想覆盖一些私有方法而不会弄乱库.

ClassInLibrary.h

@interface ClassInLibrary : UIView     
- (void)publicMethod;
@end

ClassInLibrary.m

@interface ClassInLibrary ()   
@property BOOL privateBoolean;   
@end   
@implementation ClassInLibrary  
- (void)privateMethod {
    ...
}
- (void)publicMethod {
    ...
    self.privateBoolean = YES;
    [self privateMethod];
}    
@end

我想要做的是创建一个ClassInLibrary的子类并覆盖publicMethod.但是,由于aBoolean和privateMethod不可见,有没有办法覆盖publicMethod,因为我需要使用它们？

Subclass.m

@interface Subclass ()    
@end    
@implementation Subclass
- (void)publicMethod {
    ...
    self.privateBoolean = NO; // cAnnot access
    [self privateMethod]; // cAnnot access
}   
@end

编辑：

我同意@Anoop Vaidya,调用私有API不是一个好主意.真实案例是公共方法中的硬编码字符串,我想修改它.

Superclass.m

- (void)publicMethod {
    ...
    [self privateMethod];
    ...
    NSString *String = @"a String";
    [self doSomeThingWithTheString]; // private
    ...
}

我不能使用[super publicMethod],因为它会再次调用privateMethod.
可能有更好,更安全的方法来实现这一目标吗？

SEL SELEctor = NSSELEctorFromString(@"privateMethod");
    if ([a respondsToSELEctor:SELEctor]) {
        NSLog(@"yes privateMethod exists");
#pragma clang diagnostic push
#pragma clang diagnostic ignored "-Warc-performSELEctor-leaks"
        [self performSELEctor:SELEctor];
#pragma clang diagnostic pop
    }