swizzling | 易学教程

Proper way of method swizzling in objective-C

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问题 Currently experimenting with method swizzling in Objective-C and I have a question. I am trying to understand the proper way to method swizzle and after researching online I stumbled upon this NSHipster post: http://nshipster.com/method-swizzling/ In the post the author has some method swizzling sample code. I am looking for someone to better explain to me what the author is doing.. In particular I am confused on the didAddMethod logic. Why is the author not just directly swapping/exchanging

Proper way of method swizzling in objective-C

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Swizzling Not Working in a framework

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问题 I'm developing an iOS framework and need to write a swizzling method (for viewDidAppear method in UIViewController). My swizzling method works perfectly in my application. But when I cut/paste my header+implementation files to my framework and launch the app, it doesn't work. I put an NSLog inside the load method but it doesn't print anything. For swizzling, I followed this tutorial: http://spin.atomicobject.com/2014/12/30/method-swizzling-objective-c/ I added my "UIViewController+Logging.h"

Can you swizzle application:didReceiveRemoteNotification:

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问题 I'm currently working on a product that needs to swizzle the AppDelegate's application:didReceiveRemoteNotification: (I don't want to call my new method in the appDelegate itself). The thing is: the swizzling simply doesn't work. I've already swizzled methods several times before with success, and this time, the replacing implementation is simply not called. I was wondering if that was because of some specificity of the appDelegate's methods, since these are called by the system, and not the

ObjC Runtime 黑魔法 — Method Swizzling

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【推荐】2019 Java 开发者跳槽指南.pdf(吐血整理) >>> 适用情境项目中大量控制器需要在载入时进行日志统计或进行类似的处理。如果直接往所有控制器中进行代码编写，会产生大量的重复的代码，降低了代码后期的可读性，不利于维护。由于所有部分的逻辑代码相同，针对这种情况，以切面编程（AOP）思想为导向，利用 Method Swizzling 能极大降低这种（日志统计）非主要逻辑代码与控制器的耦合度。 AOP概念详解（摘自百度百科）在软件业，AOP为Aspect Oriented Programming的缩写，意为：面向切面编程，通过预编译方式和运行期动态代理实现程序功能的统一维护的一种技术。AOP是OOP的延续，是软件开发中的一个热点，也是Spring框架中的一个重要内容，是函数式编程的一种衍生范型。利用AOP可以对业务逻辑的各个部分进行隔离，从而使得业务逻辑各部分之间的耦合度降低，提高程序的可重用性，同时提高了开发的效率。通过Demo来学习(MethodSwizzling_Demo) 1. 创建一个空工程，再为工程中的 ViewController类创建一个分类（Logging）。 2. 在ViewController 中重载 viewDidAppear: 方法。 - (void)viewDidAppear:(BOOL)animated { [super

How to swizzle a method of a private class

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问题 I have a private class (both declared & defined within .m) as an addition to an implementation of a different class, that happens to use that private class internally. I'd like to swizzle one of the methods of that private class. I defined a category and did the usual: +(void)load { Method original, swizzled; original = class_getInstanceMethod(objc_getClass("SomePrivateClass"), @selector(somePrivateMethod:)); swizzled = class_getInstanceMethod(self, @selector(swizzled_somePrivateMethod:));

How to call original implementation when overwriting a method with a category?

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问题 I try to figure out how things really work. So I thought when I would overwrite certain methods using categories, I would get interesting NSLogs. @implementation UIView(Learning) - (UIView *)hitTest:(CGPoint)point withEvent:(UIEvent *)event { NSLog(@"-hitTest:withEvent: event=%@", event); return [self hitTest:point withEvent:event]; } @end super and self don't work here. Is there a way to call the original implementation of -hitTest:withEvent:? What I want is an NSLog every time -hitTest

App Store - Method Swizzling Legality [closed]

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问题 Closed. This question is off-topic. It is not currently accepting answers. Want to improve this question? Update the question so it's on-topic for Stack Overflow. Closed 2 years ago . Is there any current information on wether or not method swizzling is legal/illegal on the App Store? The only data point I can find is the Three20 framework shakeup a while back, which started with this notice: Your application, xxx, currently posted to the App Store is using method_exchangeImplementations to

Swift function swizzling / runtime

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问题 Before Swift, in Objective-C I would swizzle or hook methods in a class using <objc/runtime.h> . If anyone has any info on the topic of modifying Swift's runtime and hooking functions like CydiaSubstrate and other libraries that helped in this area, please inform me. 回答1: I've succeed with method swizzling in Swift. This example shows how to hook description method on NSDictionary My implementation: extension NSDictionary { func myDescription() -> String!{ println("Description hooked") return

SIMBL with Method Swizzling

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问题 I have some great troubles overriding some functions in an external App that I use SIMBL to hook in to. In this app, there is a class - let's call it "AppClass". In this class there is a function, -(void)doSomething; I got this from class-dumping the Binary. the whole interface is defined as: @interface AppClass : NSObject { } I'm trying to override this function with jr_swizzleMethod:withMethod:error: With the lack of documentation, this is what I have come up with: #import "JRSwizzle.h"