unsigned int count;
    Method *methods = class_copyMethodList([UITextView class], &count);
    for (int i = 0; i < count; i++) {
        Method method = methods[i];
        SEL selector = method_getName(method);
        NSString *name = NSStringFromSelector(selector);
        NSLog(@"method_getName:%@",name);
    }
    
    unsigned int numIvars;
    Ivar *vars = class_copyIvarList([UITextView class], &numIvars);
    NSString *key=nil;
    for(int i = 0; i < numIvars; i++) {
        
        Ivar thisIvar = vars[i];
        key = [NSString stringWithUTF8String:ivar_getName(thisIvar)];
        NSLog(@"variable_name :%@", key);
    }
    free(vars);