iOS检测UIButton索引动态

Question

因此，基本上我在进行API调用以检索慈善机构列表。 然后，将所有这些放置在数组中并动态设置UIButtons。

然后，我允许用户选择慈善机构并显示带有该索引数据的视图。

我的循环在这里；

for (int i = 0; i < [self.imageArray count]; i++) {

    NSDictionary *listRoles = [self.imageArray objectAtIndex:i];

    NSString *charityName = [listRoles objectForKey:@"name"];
    NSString *charityDescription = [listRoles objectForKey:@"description"];
    NSString *charityImage = [listRoles objectForKey:@"image"];

    UIImage *pImage=[UIImage imageWithData:[NSData dataWithContentsOfURL:[NSURL URLWithString:charityImage]]];;

    UIButton *button = [[UIButton alloc] initWithFrame:frame];
    [button addTarget:self action:@selector(buttonClicked:) forControlEvents:UIControlEventTouchUpInside];
    [button setImage:pImage forState:UIControlStateNormal];
    [button setTag:i];
    [self.scrollView addSubview:button];

然后，我有了一个单击的方法；

- (void)buttonClicked:(UIButton*)button
{
    UIStoryboard *storyboard = [UIStoryboard storyboardWithName:@"Main" bundle: nil];
    CharityProfileViewController *cpvc = [storyboard instantiateViewControllerWithIdentifier:@"CharityProfile"];
    [self presentViewController:cpvc animated:YES completion:nil];
}

我如何检索索引，我知道我可以为UIButton设置随机标签，但是我怎么仍会知道哪一个呢？

Answer 1

您可以将button的标记值设置为

[button setTag:i+1];

然后在按钮动作

- (void)buttonClicked:(UIButton*)button
{
     NSLog(@"Button Tag : %d",button.tag);

    NSLog(@"Selected Index Object : %@",[self.imageArray objectAtIndex:button.tag-1]);
}

Answer 2

您可以通过button.tag检索按钮的标记，也可以将按钮添加到数组中，然后在buttonClicked:方法中使用[buttonsArray indexOfObject:button]