方法Swizzling实现未发生

Question

我正在努力学习swizzling的概念。

尽管我已经添加了method_exchangeImplementations，但这些方法仍然没有得到充分利用。你知道我哪里错了吗？

#import <objc/runtime.h>
@interface POCViewController ()
- (void)addSwizzle;
- (void)originalMethod;
- (void)swizzledMethod;
@end
@implementation POCViewController
- (void)viewDidLoad
{
    [super viewDidLoad];
// Do any additional setup after loading the view, typically from a nib.
    //Add swizzle
    [self addSwizzle];
    //Call the original method
    [self originalMethod];
}
- (void)addSwizzle
{
    Method original, swizz;
    original = class_getClassMethod([self class], @selector(originalMethod));
    swizz = class_getClassMethod([self class], @selector(swizzledMethod));
    method_exchangeImplementations(original, swizz);
}
- (void)originalMethod
{
    NSLog(@"Inside original method");
}
- (void)swizzledMethod
{
    NSLog(@"Inside swizzled method");
    [self swizzledMethod];
}

Answer 1

如果使用class_getClassMethod来获得实例方法的实现，则应该使用class_getInstanceMethod。

method_exchangeImplementations仍然以相同的方式使用