Created
November 28, 2016 22:11
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Swizzle for class method and instance method with Swift
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| func swizzleClassMethod(cls: AnyClass, oldSelector: Selector, newSelector: Selector) { | |
| let oldMethod = class_getClassMethod(cls, oldSelector) | |
| let newMethod = class_getClassMethod(cls, newSelector) | |
| method_exchangeImplementations(oldMethod, newMethod) | |
| // following code not work | |
| // if(class_addMethod(cls, oldSelector, method_getImplementation(newMethod), method_getTypeEncoding(newMethod))) { | |
| // class_replaceMethod(cls, newSelector, method_getImplementation(oldMethod), method_getTypeEncoding(oldMethod)) | |
| // } else { | |
| // method_exchangeImplementations(oldMethod, newMethod) | |
| // } | |
| } | |
| func swizzleInstanceMethod(cls: AnyClass, oldSelector: Selector, newSelector: Selector) { | |
| let oldMethod = class_getInstanceMethod(cls, oldSelector) | |
| let newMethod = class_getInstanceMethod(cls, newSelector) | |
| if(class_addMethod(cls, oldSelector, method_getImplementation(newMethod), method_getTypeEncoding(newMethod))) { | |
| class_replaceMethod(cls, newSelector, method_getImplementation(oldMethod), method_getTypeEncoding(oldMethod)) | |
| } else { | |
| method_exchangeImplementations(oldMethod, newMethod) | |
| } | |
| } |
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