iOS 修改原生弹出框

Objective-C

开发过程中，一般需要用到弹出框提醒用户，使用系统自带的AlertController最方便快捷，但有时候往往需要自定义其中的某些样式。如图:

1.png

我们可以通过递归的方式找到alertview然后进行自定义

    //递归找到title
    UIView *messageParentView = [self getParentViewOfTitleAndMessageFromView:alert.view];
    if (messageParentView && messageParentView.subviews.count > 1) {
        DLog(@"%@",messageParentView.subviews);
    }

- (UIView *)getParentViewOfTitleAndMessageFromView:(UIView *)view {
    for (UIView *subView in view.subviews) {
        if ([subView isKindOfClass:[UILabel class]]) {
            return view;
        }else{
            UIView *resultV = [self getParentViewOfTitleAndMessageFromView:subView];
            if (resultV) return resultV;
        }
    }
    return nil;
}

通过打印的subviews

[
>,
>,
>,
>
]

找到前2个Label分别是title和message。

文章终于有人看了看到评论有疑问补个swift版的

swift

道理都是通的

 if let view = self.getParentViewOfTitleAndMessageFromView(view: alertC.view) {
            print(view.subviews)
        }

func getParentViewOfTitleAndMessageFromView(view:UIView) -> UIView? {
        for item in view.subviews {
            if item.isKind(of: UILabel.self) {//如果subview包含label直接返回
                return view
            }else{//继续遍历 找到包含label的view
                if let resultView = self.getParentViewOfTitleAndMessageFromView(view: item) {
                    return resultView
                }
            }
        }
        return nil
    }

通过打印的subviews

[>,
 >,
 >, 
 >]

找到前2个Label分别是title和message。