如何从视图中获取所有按钮？

Question

我尝试从

UIView

获取所有按钮。我尝试了这段代码，但它不起作用。

for (UIView *subview in self.view.subviews)
{
    if ([subview isKindOfClass:[UIButton class]]
    {
        NSLog(@"found a button!");
        subview.layer.borderWidth = 1.0f;
        subview.layer.borderColor = [[UIColor whiteColor] CGColor];
        [subview.layer setCornerRadius: subview.frame.size.width/2.0f];
        NSLog(@"button.tag = %ld", (long)subview.tag);
    }
}

请帮忙。

Answer 1

使用此代码：

- (void)getAllButtonFromView:(UIView*)view {
    for (UIView* subview in view.subviews) {

        if (subview.subviews.count > 0) {
            [self getAllButtonFromView:subview];
        }        
        else if ([subview isKindOfClass:[UIButton class]]) {

            NSLog(@"found a button!");
            subview.layer.borderWidth = 1.0f;
            subview.layer.borderColor = [[UIColor whiteColor] CGColor];
            [subview.layer setCornerRadius: subview.frame.size.width/2.0f];
            NSLog(@"button.tag = %ld", (long)subview.tag);
        }
    }
}

问题可能是您的按钮没有直接添加到您的视图中，事实上它们被添加到视图的子视图中。因此，只需检查 view.subviews 中的子视图中的视图是否具有包含 UIButton 的子视图即可。

Answer 2

迅捷解决方案4.0+

func getAllButtonFromViewRecursion(view: UIView)  {

    for insideView in view.subviews {
        if insideView.subviews.count > 0 {
            getAllButtonFromView(view: insideView)
        }
        else if (insideView.isKind(of: UIButton)) {
            insideView.layer.borderWidth = 1.0
            insideView.layer.borderColor = UIColor.white.cgColor
            insideView.layer.cornerRadius = 2.0
        }
    }
}

目标C解决方案

- (void)getAllButtonFromViewWithRecursion:(UIView*)view {

    for (UIView* insideView in view.subviews) {

        if (insideView.subviews.count > 0) {
            [self getAllButtonFromView:insideView];
        }        
        else if ([insideView isKindOfClass:[UIButton class]]) {

            NSLog(@"found a button!");
            insideView.layer.borderWidth = 1.0f;
            insideView.layer.borderColor = [[UIColor whiteColor] CGColor];
            [insideView.layer setCornerRadius: subview.frame.size.width/2.0f];
            NSLog(@"button.tag = %ld", (long)subview.tag);
        }
     }
  }

Answer 3

环球银行金融电信协会5.2

for subview in self.view.subviews {
    if subview is UIButton {
        let button = subview as! UIButton
        // do smth with a button
        button.setBackgroundImage(nil, for: .normal)
        button.isUserInteractionEnabled = true
    }
}

Answer 4

Swift 5。我有 25 个按钮。 1 行 3 个按钮。所有按钮都有不同的尺寸。 1 个 stackView 中的 3 个按钮和 1 个堆栈中的所有行。如何获取所有带有标签的按钮。也许有人帮忙。

for allSubview in self.buttonsStackView.subviews {
    for subview in allSubview.subviews {
        if subview is UIButton {
            switch subview.tag {
            case 100...125:
                subview.layer.cornerRadius = 20
                subview.layer.borderWidth = 1
                subview.layer.borderColor = UIColor.white.withAlphaComponent(0.3).cgColor
            default:
                break
            }
        }
    }
}