这期内容当中小编将会给大家带来有关runtime如何在IOS 中使用，文章内容丰富且以专业的角度为大家分析和叙述，阅读完这篇文章希望大家可以有所收获。
新建两个类ClassOne和ClassTwo
#import@interface ClassOne : NSObject{ NSString *_publicVar1; NSString *_publicVar2; } @property(nonatomic,copy) NSString *publicProperty1; @property(nonatomic,copy) NSString *publicProperty2; - (void) testClassOneWithArg1:(NSString *)arg1; @end #import "ClassOne.h" @interface ClassOne() @property(nonatomic,copy) NSString *privateProperty1; @property(nonatomic,copy) NSString *privateProperty2; @end @implementation ClassOne{ NSString *_privateVar1; NSString *_privateVar2; } - (void)testClassOneWithArg1:(NSString *)arg1{ NSLog(@"this is CalssOne, arg1:%@",arg1); } - (void)testClassOneWithArg1:(NSString *)arg1 arg2:arg2{ NSLog(@"this is CalssOne, arg1:%@ arg2:%@",arg1,arg2); } @end
#import@interface ClassTwo : NSObject - (void) testClassTwoWithArg1:(NSString *)arg1 arg2:(NSString *)arg2; @end #import "ClassTwo.h" @implementation ClassTwo - (void)testClassTwoWithArg1:(NSString *)arg1 arg2:(NSString *)arg2{ NSLog(@"this is ClassTwo arg1:%@,arg2:%@",arg1,arg2); } @end
1.拷贝对象
ClassOne *one = [ClassOne new]; id onec1 = object_copy(one,sizeof(one));
2.给类添加方法
ClassOne *one = [ClassOne new];
class_addMethod([ClassOne class], @selector(testClassOneWithArg1:arg2:arg3:), (IMP)testClassOne , "i@:@@@");
[one testClassOneWithArg1:@"arg1" arg2:@"arg2" arg3:@"arg3"];
//方法对应的C函数
int testClassOne(id self,SEL _cmd, NSString *arg1,NSString *arg2,NSString *arg3){
NSLog(@"this is a test function add to ClassOne as a methad with arg1:%@ arg2:%@ and arg3:%@",arg1,arg2,arg3);
return 10;
}3.添加属性（方式一）
//属性类型
objc_property_attribute_t type = { "T", "@\"NSString\"" };
//访问类型
objc_property_attribute_t ownership = { "C", "" };
//对应成员变量名称
objc_property_attribute_t backingivar = { "V", "_testPropertyName" };
objc_property_attribute_t attrs[] = { type, ownership, backingivar };
class_addProperty([ClassOne class], "testPropertyName", attrs, 3);
class_addMethod([ClassOne class], @selector(testPropertyName), (IMP)testPropertyNameGetter , "@:@@");
class_addMethod([ClassOne class], @selector(setTestPropertyName:), (IMP)testPropertyNameSetter, "v:@@@");
//属性对应的Getter方法
NSString* testPropertyNameGetter(id self,SEL _cmd){
Ivar ivar = class_getInstanceVariable([ClassOne class], "_testPropertyName");
return object_getIvar(self, ivar);
}
//属性对应的Setter方法
void testPropertyNameSetter(id self,SEL _cmd,NSString *testPropertyNameValue){
Ivar ivar = class_getInstanceVariable([ClassOne class], "_testPropertyName");
object_setIvar(self, ivar, testPropertyNameValue);
}4.添加属性（方式2）
ClassOne *one = [ClassOne new]; 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 = [ClassOne new]; const char *className = object_getClassName(one); NSLog(@"className:%@",[NSString stringWithUTF8String:className]);
6.获取一个类的所有方法
UInt count;
Method *methods = class_copyMethodList([ClassOne class], &count);
for (int i = 0; i < count; i++) {
Method method = methods[i];
SEL sel = method_getName(method);
NSLog(@"方法名:%@",NSStringFromSelector(sel));
}7.获取一个类的所有属性
uint propertyCount;
objc_property_t *ps = class_copyPropertyList([ClassOne class], &propertyCount);
for (uint i = 0; i < propertyCount; i++) {
objc_property_t property = ps[i];
const char *propertyName = property_getName(property);
const char *propertyAttributes = property_getAttributes(property);
NSLog(@"propertyName:%@",[NSString stringWithUTF8String:propertyName]);
NSLog(@"propertyAttributes:%@",[NSString stringWithUTF8String:propertyAttributes]);
}8.获取类的所有成员变量
uint ivarCount;
Ivar *ivars = class_copyIvarList([ClassOne class], &ivarCount);
for (uint i = 0; i < ivarCount; i++) {
Ivar ivar = ivars[i];
const char *ivarName = ivar_getName(ivar);
NSLog(@"ivarName:%@",[NSString stringWithUTF8String:ivarName]);
}9.获得成员变量类型
uint ivarCount;
Ivar *ivars = class_copyIvarList([ClassOne class], &ivarCount);
for (uint i = 0; i < ivarCount; i++) {
Ivar ivar = ivars[i];
const char *ivarName = ivar_getName(ivar);
const char *type = ivar_getTypeEncoding(ivar);
NSLog(@"ivarName=%@,type=%@",[NSString stringWithUTF8String:ivarName],[NSString stringWithUTF8String:type]);
}上述就是小编为大家分享的runtime如何在IOS 中使用了，如果刚好有类似的疑惑，不妨参照上述分析进行理解。如果想知道更多相关知识，欢迎关注创新互联网站建设公司行业资讯频道。
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