ios - 旋转时自定义 UIView 调整大小

Question

我知道有几个类似的问题，但我仍然没有找到合适的解决方案。我刚刚创建了一个带有自定义视图的测试项目：

@interface CustomView : UIView

//..

- (id)initWithFrame:(CGRect)frame
{
    self = [super initWithFrame:frame];
    if (self) {
        [self setBackgroundColor:[UIColor redColor]];

    }
    return self;
}

和视图控制器：

- (void)viewDidLoad
{
    [super viewDidLoad];

    CustomView *cv = [(CustomView *) [CustomView alloc] initWithFrame:self.view.frame];
    [self.view addSubview: cv];
}

在横向模式下，我们可以看到：

如何解决？我知道layoutSubviews，但1.在旋转时不会调用它；2.我如何在这里调整视图的大小？

Answer 1

尝试设置 autoresizingMask。

CustomView *cv = [(CustomView *) [CustomView alloc] initWithFrame:self.view.frame];
cv.autoresizingMask = UIViewAutoresizingFlexibleLeftMargin | UIViewAutoresizingFlexibleRightMargin | UIViewAutoresizingFlexibleWidth | UIViewAutoresizingFlexibleTopMargin | UIViewAutoresizingFlexibleHeight | UIViewAutoresizingFlexibleBottomMargin;
[self.view addSubview: cv];

您还可以查看自动布局

https://developer.apple.com/library/ios/recipes/xcode_help-interface_builder/articles/UnderstandingAutolayout.html

问候，