如何对指定实例使用swizzling方法？

#import <objc/runtime.h>

@interface MyClass (Swizzling)
@end

@implementation MyClass (Swizzling)

+ (void)load {
    static dispatch_once_t onceToken;
    dispatch_once(&onceToken, ^{
        Class class = [self class];
        
        SEL originalSelector = @selector(originalMethod);
        SEL swizzledSelector = @selector(swizzledMethod);
        
        Method originalMethod = class_getInstanceMethod(class, originalSelector);
        Method swizzledMethod = class_getInstanceMethod(class, swizzledSelector);
        
        BOOL didAddMethod = class_addMethod(class, originalSelector, method_getImplementation(swizzledMethod), method_getTypeEncoding(swizzledMethod));
        
        if (didAddMethod) {
            class_replaceMethod(class, swizzledSelector, method_getImplementation(originalMethod), method_getTypeEncoding(originalMethod));
        } else {
            method_exchangeImplementations(originalMethod, swizzledMethod);
        }
    });
}

- (void)originalMethod {
    // 原始方法的实现
    NSLog(@"Original Method");
}

- (void)swizzledMethod {
    // 自定义方法的实现
    NSLog(@"Swizzled Method");
}

@end