动态创建一堆UITextField，怎么准确获取某一个

Question

这样根据数据信息，动态创建了一堆UITextField，每一个UITextField都对应了一个UIButton。

for(i=0; i<[users count]; i++)
{
    NSString *name = [users objectAtIndex:i];
    UITextField *user = [[UITextField alloc] initWithFrame:CGRectMake(0.f, top, 200.f, 30.f)];
    user.text = name;
    user.returnKeyType = UIReturnKeyDone;
    user.keyboardType = UIKeyboardTypeDefault;

    UIButton *btn = [[UIButton alloc] initWithFrame:CGRectMake(220.f, top, 80.f, 30.f)];
    [btn addTarget:self action:@selector(clicked:) forControlEvents:UIControlEventTouchUpInside];

    [self.scroller addSubview:user];
    [self.scroller addSubview:btn];

    top = top + 40;
}

现在要通过点击某个Button，修改对应的UITextField的值
之前都是把UITextField做成全局变量的，现在动态创建不能全局了，怎么办？

Answer 1

创建时

for(i=0; i<[users count]; i++)
{
    NSString *name = [users objectAtIndex:i];
    UITextField *user = [[UITextField alloc] initWithFrame:CGRectMake(0.f, top, 200.f, 30.f)];

    //注意这句
    user.tag = i;
    //注意上面这句
    user.text = name;
    user.returnKeyType = UIReturnKeyDone;
    user.keyboardType = UIKeyboardTypeDefault;

    UIButton *btn = [[UIButton alloc] initWithFrame:CGRectMake(220.f, top, 80.f, 30.f)];
    [btn addTarget:self action:@selector(clicked:) forControlEvents:UIControlEventTouchUpInside];

    [self.scroller addSubview:user];
    [self.scroller addSubview:btn];

    top = top + 40;
}

获取时

UITextField *user = [self.scroller viewWithTag:i];

另建议将user命名为userTextField