OCRunner

Execute Objective-C code Dynamically.

Run Demo

You should use 'git clone --recursive'.

git clone --recursive https://github.com/SilverFruity/OCRunner.git

git clone https://github.com/SilverFruity/OCRunner.git
cd OCRunner
git submodule update --init --recursive

The unit tests of OCRunner.framework has move to OCRunnerDemo。

Feature

Execute Objective-C code Dynamically。
Unit test coverage is 86%。
Support link system Non-inline C function by using Global C function declaration syntax in script。
Support structure declaration syntax in script. You can freely use structures in scripts。
Support enum declaration syntax.
Support typedef.
Support call multiple arguments function and method.
Support pointer operators : '&' and '*'.
Support Protocol.
Optinal libffi.a or build-in customized arm64 abi (modified from libffi)

Default using libffi.a.
- Do not use libffi.a: you should remove the reference of 'libffi' folder from project.
- Use libffi.a: add the libffi folder to project.
Not support pre-compile, C array declaration syntax.

Recommend: start eating from the unit test.

Example

NSString * source =
@"@protocol Protocol1 <NSObject>"
@"@property (nonatomic,copy)NSString *name;"
@"-(NSUInteger)getAge;"
@"-(void)setAge:(NSUInteger)age;"
@"@end"
@"@protocol Protocol2 <Protocol1>"
@"- (void)sleep;"
@"@end"
@"@interface TestObject : NSObject <Protocol2>"
@"@property (nonatomic,copy)NSString *name;"
@"@end"
@"@implementation TestObject"
@"- (NSUInteger)getAge{"
@"    return 100;"
@"}"
@"-(void)setAge:(NSUInteger)age{"
@"}"
@"- (void)sleep{"
@"}"
@"@end";
[ORInterpreter excute:source];
Class testClass = NSClassFromString(@"TestObject");
NSAssert([testClass conformsToProtocol:NSProtocolFromString(@"Protocol1")]);
NSAssert([testClass conformsToProtocol:NSProtocolFromString(@"Protocol2")]);
id object = [[testClass alloc] init];
NSAssert([object conformsToProtocol:NSProtocolFromString(@"Protocol1")]);
NSAssert([object conformsToProtocol:NSProtocolFromString(@"Protocol2")]);

Cocoapods

pod 'OCRunner'      #for all architectures, include libffi.a
pod 'OCRunnerArm64' #only for arm64 or amr64e, no libffi.a

What's the difference of Objective-C

Not support pre-compile

Such as #define, #if etc.

The problems of hot fix Class

Problem 1:if Class1 have five method (a,b,c,d,e) and several properties, if i only want to hot fix 'a' method, how can i do it ? anwser: you only need to imp the 'a' method in scripts.

Fix Existed Class

The shortest way:

@implementation ORTestReplaceClass
- (int)otherMethod{
    return 10;
}
- (int)test{
    return [self otherMethod];
}
@end

If want to add properties (not support add ivars), you should:

@interface ORTestReplaceClass : NSObject
@property (assign, nonatomic) NSInteger num;
@end
@implementation ORTestReplaceClass
- (int)otherMethod{
    return 10;
}
- (int)test{
    return [self otherMethod];
}
@end

Create new Class

In this situation, ORTestReplaceClass inherit NSObjece.

@implementation ORTestReplaceClass
- (int)otherMethod{
    return 10;
}
- (int)test{
    return [self otherMethod];
}
@end

if you want to add ivar, property or customized superClass，you should imp @interface.

Notice: ivar must be used in new Class.

@interface ORTestReplaceClass : NSObject
{
  int _testValue;
  id _testObject;
}
@property (assign, nonatomic) NSInteger num;
@end
@implementation ORTestReplaceClass
{
  int _impivar;
}
- (int)otherMethod{
    return 10;
}
- (int)test{
    return [self otherMethod];
}
@end

Support Category Syntax

@implementation Demo
- (instancetype)initWithBaseUrl:(NSURL *)baseUrl{ }
- (NSString *)method2:(void(^)(NSString *name))callback{ }
@end
@implementation Demo (Category)
- (NSString *)method3:(void(^)(NSString *name))callback{ }
@end

About Enum Syntax

Not surpport NS_ENUM和NS_OPTION.

You should use C syntax.

//typedef NS_OPTIONS(NSUInteger, UIControlEvents) {}
//convert to this
typedef enum: NSUInteger {

}UIControlEvents;

About Struct Syntax

The referenced structure must be declared in advance.

// CGPoint must be in front of CGRect
struct CGPoint { 
    CGFloat x;
    CGFloat y;
};
// CGSize must be in front of CGRect
struct CGSize { 
    CGFloat width;
    CGFloat height;
};
struct CGSize { 
    CGPoint point;
    CGSize size; 
};

constant, type, struct, enum, global function.

constant、struct、enum

Way 1:

// Need write those code in Application files
// Struct
ORStructDeclareTable *table = [ORStructDeclareTable shareInstance];
[table addStructDeclare:[ORStructDeclare structDecalre:@encode(CGPoint) keys:@[@"x",@"y"]]];
// Constant
[MFScopeChain.topScope setValue:[MFValue valueWithLongLong:DISPATCH_QUEUE_PRIORITY_HIGH] withIndentifier:@"DISPATCH_QUEUE_PRIORITY_HIGH"];

// Enum is similar to Constant
[MFScopeChain.topScope setValue:[MFValue valueWithULongLong:UIControlEventTouchDragInside] withIndentifier:@"UIControlEventTouchDragInside"];

Way 2:

// Need write those code in Scripts
typedef struct CGPoint { 
    CGFloat x;
    CGFloat y;
} CGPointss;
typedef enum: NSUInteger{
    UIControlEventTouchDown = 1 <<  0,
    UIControlEventTouchDownRepeat = 1 <<  1,
    UIControlEventTouchDragInside = 1 <<  2,
    UIControlEventAllTouchEvents = 0x00000FFF,
}UIControlEvents;
// it will add four types: CGPoint, CGPointss, UIControlEvents
// add four constants: UIControlEventTouchDown UIControlEventTouchDownRepeat UIControlEventTouchDragInside UIControlEventAllTouchEvents

Add new type

// use it in Scripts
typedef NSInteger dispatch_once_t;

// problem code:
typedef long long IntegerType;
typedef IntegerType dispatch_once_t;

Global Function

Pre-compile function:

[MFScopeChain.topScope setValue:[MFValue valueWithBlock:^void(dispatch_queue_t queue, void (^block)(void)) {
		dispatch_async(queue, ^{
			block();
		});
	}] withIndentifier:@"dispatch_async"]

Non-inline function:

// add this in Scripts
void NSLog(NSString *format, ...);

Inline function

For example: dispatch_get_main_queue

Way 1

// the code in Application files
[MFScopeChain.topScope setValue:[MFValue valueWithBlock:^id() {
 		return dispatch_get_main_queue();
}]withIndentifier:@"dispatch_get_main_queue"];

Way 2

// write in script. OCRunner will auto print it in console on the debug mode.
dispatch_queue_main_t dispatch_get_main_queue(void);
// the code in Application files
[ORSystemFunctionTable reg:@"dispatch_get_main_queue" pointer:&dispatch_get_main_queue];

(CGRectMake etc.) Inline function、Custom function

// write in script
CGRect CGRectMake(CGFloat x, CGFloat y, CGFloat width, CGFloat height)
{
  CGRect rect;
  rect.origin.x = x; rect.origin.y = y;
  rect.size.width = width; rect.size.height = height;
  return rect;
}

About #import

#import can be omitted.

Not Support

int a[x]
typeof
@optional
@encode
@synchronized
@try
@catch
@available
@protocol
@autoreleasepool
@dynamic
@synthesize
IBOutlet
IBAction
IBInspectable

Thanks for

Mango
libffi
Procedure Call Standard for the ARM 64-bit Architecture.

lctank / OCRunner