iOS 9：以编程方式进行安全区域布局，并删除视图中的侧边空间

如何在我的应用程序中为iPhone 5S和iOS 9.3.5添加安全区域布局。 我的代码是这样的

if (@available(iOS 11, *))
    {
        loginView = [[LoginView alloc] initWithFrame:self.view.safeAreaLayoutGuide.layoutFrame];
        [self.view addSubview:loginView];
        loginView.translatesAutoresizingMaskIntoConstraints = NO;

        UILayoutGuide * guide = self.view.safeAreaLayoutGuide;
        [loginView.leadingAnchor constraintEqualToAnchor:guide.leadingAnchor].active = YES;
        [loginView.trailingAnchor constraintEqualToAnchor:guide.trailingAnchor].active = YES;
        [loginView.topAnchor constraintEqualToAnchor:guide.topAnchor].active = YES;
        [loginView.bottomAnchor constraintEqualToAnchor:guide.bottomAnchor].active = YES;
    }
    else
    {
        loginView = [[LoginView alloc] initWithFrame:self.view.layoutMarginsGuide.layoutFrame];
        [self.view addSubview:loginView];
        loginView.translatesAutoresizingMaskIntoConstraints = NO;

        UILayoutGuide *margins = self.view.layoutMarginsGuide;
        [viloginViewew.leadingAnchor constraintEqualToAnchor:margins.leadingAnchor].active = YES;
        [loginView.trailingAnchor constraintEqualToAnchor:margins.trailingAnchor].active = YES;
        [loginView.topAnchor constraintEqualToAnchor:self.topLayoutGuide.bottomAnchor].active = YES;
        [loginView.bottomAnchor constraintEqualToAnchor:self.bottomLayoutGuide.topAnchor].active = YES;

    }

我试图在我的设备中运行，但安全区域布局显示左右两侧有一些空间。我想删除该空间，使其显示全宽

而且我从layoutMarginsGuide中得到的高度太长，所以它被隐藏在视线之外。如何获得正确的布局边缘高度指南

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我是否实现了错误的代码？我该怎么办？

iPhone 5s对我来说很管用。它覆盖了所有的空间。将其用于11以下的iOS

[self.view addConstraints:@[
    [NSLayoutConstraint constraintWithItem:loginView
                                 attribute:NSLayoutAttributeBottom
                                 relatedBy:NSLayoutRelationEqual
                                    toItem:self.bottomLayoutGuide
                                 attribute:NSLayoutAttributeBottom
                                multiplier:1
                                  constant:0],
    [NSLayoutConstraint constraintWithItem:loginView
                                 attribute:NSLayoutAttributeTop
                                 relatedBy:NSLayoutRelationEqual
                                    toItem:self.bottomLayoutGuide
                                 attribute:NSLayoutAttributeTop
                                multiplier:1
                                  constant:0],
    [NSLayoutConstraint constraintWithItem:loginView
                                 attribute:NSLayoutAttributeLeading
                                 relatedBy:NSLayoutRelationEqual
                                    toItem:self.view
                                 attribute:NSLayoutAttributeLeading
                                multiplier:1
                                  constant:0],
    [NSLayoutConstraint constraintWithItem:loginView
                                 attribute:NSLayoutAttributeTrailing
                                 relatedBy:NSLayoutRelationEqual
                                    toItem:self.view
                                 attribute:NSLayoutAttributeTrailing
                                multiplier:1
                                  constant:0]
                            ]]

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只需删除self.view.layoutMarginsGuide to self.view我收到这样的警告：“无法同时满足约束。下面列表中可能至少有一个约束是您不想要的。”看起来视图确实满了，没有左、右空间，但也没有顶部空间。我的俯视图是落后时间，电池状态现在。我希望我的顶视图不在落后时间，电池状态。将顶部常量设置为20，第二个约束，状态栏将可见