IOS 中runtime使用方法整理

2024-02-26 13:42:03 62

IOS中runtime使用方法整理

做iOS的朋友都知道或听说runtime,这个东西很像java的反射机制,但功能远胜于java的反射。通过runtime我们可以动态的向一个类中添加属性、成员变量、方法，以及对其进行读写访问。

新建两个类ClassOne和ClassTwo

#import

@interfaceClassOne:NSObject{
NSString*_publicVar1;
NSString*_publicVar2;
}

@property(nonatomic,copy)NSString*publicProperty1;
@property(nonatomic,copy)NSString*publicProperty2;

-(void)testClassOneWithArg1:(NSString*)arg1;
@end


#import"ClassOne.h"

@interfaceClassOne()
@property(nonatomic,copy)NSString*privateProperty1;
@property(nonatomic,copy)NSString*privateProperty2;

@end

@implementationClassOne{
NSString*_privateVar1;
NSString*_privateVar2;
}

-(void)testClassOneWithArg1:(NSString*)arg1{
NSLog(@"thisisCalssOne,arg1:%@",arg1);
}

-(void)testClassOneWithArg1:(NSString*)arg1arg2:arg2{
NSLog(@"thisisCalssOne,arg1:%@arg2:%@",arg1,arg2);
}
@end

#import

@interfaceClassTwo:NSObject
-(void)testClassTwoWithArg1:(NSString*)arg1arg2:(NSString*)arg2;
@end


#import"ClassTwo.h"

@implementationClassTwo
-(void)testClassTwoWithArg1:(NSString*)arg1arg2:(NSString*)arg2{
NSLog(@"thisisClassTwoarg1:%@,arg2:%@",arg1,arg2);
}
@end

1.拷贝对象

ClassOne*one=[ClassOnenew];
idonec1=object_copy(one,sizeof(one));

2.给类添加方法

ClassOne*one=[ClassOnenew];
class_addMethod([ClassOneclass],@selector(testClassOneWithArg1:arg2:arg3:),(IMP)testClassOne,"i@:@@@");
[onetestClassOneWithArg1:@"arg1"arg2:@"arg2"arg3:@"arg3"];

//方法对应的C函数
inttestClassOne(idself,SEL_cmd,NSString*arg1,NSString*arg2,NSString*arg3){
NSLog(@"thisisatestfunctionaddtoClassOneasamethadwitharg1:%@arg2:%@andarg3:%@",arg1,arg2,arg3);
return10;
}

3.添加属性（方式一）

//属性类型
objc_property_attribute_ttype={"T","@\"NSString\""};
//访问类型
objc_property_attribute_townership={"C",""};
//对应成员变量名称
objc_property_attribute_tbackingivar={"V","_testPropertyName"};
objc_property_attribute_tattrs[]={type,ownership,backingivar};
class_addProperty([ClassOneclass],"testPropertyName",attrs,3);
class_addMethod([ClassOneclass],@selector(testPropertyName),(IMP)testPropertyNameGetter,"@:@@");
class_addMethod([ClassOneclass],@selector(setTestPropertyName:),(IMP)testPropertyNameSetter,"v:@@@");


//属性对应的Getter方法
NSString*testPropertyNameGetter(idself,SEL_cmd){
Ivarivar=class_getInstanceVariable([ClassOneclass],"_testPropertyName");
returnobject_getIvar(self,ivar);
}

//属性对应的Setter方法
voidtestPropertyNameSetter(idself,SEL_cmd,NSString*testPropertyNameValue){
Ivarivar=class_getInstanceVariable([ClassOneclass],"_testPropertyName");
object_setIvar(self,ivar,testPropertyNameValue);
}

4.添加属性（方式2）

ClassOne*one=[ClassOnenew];
objc_setAssociatedObject(one,"objTag",@"value",OBJC_ASSOCIATION_COPY);
NSString*value=objc_getAssociatedObject(one,"objTag");
NSLog(@"通过Associate设置:%@",value);

5.获取类的名称

ClassOne*one=[ClassOnenew];
constchar*className=object_getClassName(one);
NSLog(@"className:%@",[NSStringstringWithUTF8String:className]);

6.获取一个类的所有方法

UIntcount;
Method*methods=class_copyMethodList([ClassOneclass],&count);
for(inti=0;i
7.获取一个类的所有属性
uintpropertyCount;
objc_property_t*ps=class_copyPropertyList([ClassOneclass],&propertyCount);
for(uinti=0;i
8.获取类的所有成员变量
uintivarCount;
Ivar*ivars=class_copyIvarList([ClassOneclass],&ivarCount);
for(uinti=0;i
9.获得成员变量类型
uintivarCount;
Ivar*ivars=class_copyIvarList([ClassOneclass],&ivarCount);
for(uinti=0;i
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IOS 中runtime使用方法整理

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