基于flex/yacc的iOS热更新框架

中文介绍 | 原理介绍

A hotfix library based on flex/yacc. You can call any Objective-C class and method using DynamicOC. DynamicOC is functionally similar to JSPath, but it only needs to write native OC syntax to implement hotfix.

Features

• dynamically execute Objective-C code
• dynamically execute C function and block
• dynamically add property
• dynamically replace method
• dynamically add method
• Completed and detailed unit test
• powerful OC syntax parser based on flex/yacc
• support CGRect/CGSize/CGPoint/NSRange/UIEdgeInsets/CGAffineTransform C-struct ...

Basic Usage

dynamically execute block

NSString* text = @" /__block int result = 0;/UIView* view = [[UIView alloc]init];/void(^blk)(int value) = ^(int value){/    view.tag = value;/};/blk(1024);/return view.tag;";ASTNode* root = [ASTUtil parseString:text];ASTVariable* result = [root execute];NSAssert([result.value doubleValue] == 1024, nil);

dynamically execute C function

int echo(int value) {    return value;}NSString* text = @" /[OCCfuntionHelper defineCFunction:@/"echo/" types:@/"int, int/"]; /return echo(1024);";ASTNode* root = [ASTUtil parseString:text];ASTVariable* result = [root execute];NSAssert([result.value doubleValue] == 1024, nil);

dynamically add property

NSString* text = @" /[OCCfuntionHelper defineCFunction:@/"objc_setAssociatedObject/" types:@/"void,id,void *,id,unsigned int/"];/[OCCfuntionHelper defineCFunction:@/"objc_getAssociatedObject/" types:@/"id,id,void */"];/NSString* key = @/"key/"; /objc_setAssociatedObject(self, key, @(1024), 1);/return objc_getAssociatedObject(self, key);";ASTNode* root = [ASTUtil parseString:text];ASTVariable* result = [root execute];NSAssert([result.value doubleValue] == 1024, nil);

Supported Syntax

• if/else while do/while for
• return break continue
• i++ i-- ++i --i
• +i -i !i
• + - * / % Arithmetic operation
• >> << & | ^ Bit operation
• && || >= <= != > < Compare operation
• ?:
• __block
• array[i] dict[@""]
• @666 @() @[] @{}
• self super
• self.property
• self->_property
• most of objective-c keyword

TODO

• @available()
• [NSString stringWithFormat:"%d",value] : use [NSString stringWithFormat:"%@",@(value)] instead。
• dispatch_async / dispatch_after ...
• *stop =YES, in block
• fix bugs

Communication

• GitHub : dKingbin
• Email : [email protected]

Warnning

Purely technology sharing, DO NOT Sheld to appstore! 

License

Copyright (c) 2019 dKingbinLicensed under MIT or later

DynamicOC required features are based on or derives from projects below:

• MIT
• JSPatch
• Aspects
• OCEval

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