ios开发 Reflection(二)

反射机制可以获取的内容

1.获取一个 类的所有属性

#pragma -mark 获取变量列表

-(void)getVarName
{
    unsigned int numIvars; //成员变量个数
    Ivar *vars = class_copyIvarList(NSClassFromString(@"TestObject"), &numIvars);
    //Ivar *vars = class_copyIvarList([UIView class], &numIvars);
    
    NSString *key=nil;
    for(int i = 0; i < numIvars; i++) {
        
        Ivar thisIvar = vars[i];
        key = [NSString stringWithUTF8String:ivar_getName(thisIvar)];  //获取成员变量的名字
        NSLog(@"variable name :%@", key);
        key = [NSString stringWithUTF8String:ivar_getTypeEncoding(thisIvar)]; //获取成员变量的数据类型
        NSLog(@"variable type :%@", key);
    }
    free(vars);

}

2.获取一个类的所有方法：

#pragma -mark 获取方法列表

-(void)getFunName
{
     unsigned int numIvars; //成员方法个数
    Method *meth = class_copyMethodList(NSClassFromString(@"TestObject"), &numIvars);
    //Method *meth = class_copyMethodList([UIView class], &numIvars);
    
    for(int i = 0; i < numIvars; i++) {
        Method thisIvar = meth[i];
        
        SEL sel = method_getName(thisIvar);
        const char *name = sel_getName(sel);
        
        NSLog(@"zp method :%s", name);
        

    }
    free(meth);
}

3.获取变量名

#pragma -mark 根据变量属性值获取属性名

- (NSString *)nameWithInstance:(id)instance
{
    unsigned int numIvars = 0;
    NSString *key=nil;
    Ivar * ivars = class_copyIvarList([TestObject class], &numIvars);
    for(int i = 0; i < numIvars; i++) {
        Ivar thisIvar = ivars[i];
        const char *type = ivar_getTypeEncoding(thisIvar);
        NSString *stringType =  [NSString stringWithCString:type encoding:NSUTF8StringEncoding];
        if (![stringType hasPrefix:@"@"]) {
            continue;
        }
        if ((object_getIvar(tObject, thisIvar) == instance)) {
            key = [NSString stringWithUTF8String:ivar_getName(thisIvar)];
            break;
        }
    }
    free(ivars);
    
    NSLog(@"key:%@",key);
    
    return key;
    
}