Question

有几次，我需要堆叠视图哪个高度有望改变。

我对此https://github.com/damienromito/UIView-AutoYPositioning

进行了编码

stack dynamic views http://romito.fr/public/images/UIView+AutoYPositioning.jpg

但我认为NSLayoutConstraint的最佳解决方案。有人知道吗？

修改

使用autolayout以编程方式解决方案：

UIView *one = [[UIView alloc]init];
one.backgroundColor = [UIColor redColor];
one.translatesAutoresizingMaskIntoConstraints = NO;
[self.view addSubview:one];

UIView *two = [[UIView alloc]init];
two.backgroundColor = [UIColor blueColor];
two.translatesAutoresizingMaskIntoConstraints = NO;
[self.view addSubview:two];

UIView *three = [[UIView alloc]init];
three.backgroundColor = [UIColor yellowColor];
three.translatesAutoresizingMaskIntoConstraints = NO;
[self.view addSubview:three];

NSDictionary *metrics = @{@"height":@50.0};
NSDictionary *views = NSDictionaryOfVariableBindings(one,two,three);

[self.view addConstraints:[NSLayoutConstraint
                           constraintsWithVisualFormat:@"|-[one]-|"
                           options: 0
                           metrics:metrics
                           views:views]];


[self.view addConstraints:[NSLayoutConstraint
                           constraintsWithVisualFormat:@"V:|-[one]-[two(300)]-[three(100)]-|"
                           options:NSLayoutFormatAlignAllLeft | NSLayoutFormatAlignAllRight
                           metrics:metrics
                           views:views]];

请参阅本教程（http://commandshift.co.uk/blog/2013/01/31/visual-format-language-for-autolayout/）作为解释

Answer 1

以下是一些关于自动布局的教程。 Raywenderlinch-1，Raywenderlinch-2，

Answer 2

使用autolayout以编程方式解决方案：

UIView *one = [[UIView alloc]init];
one.backgroundColor = [UIColor redColor];
one.translatesAutoresizingMaskIntoConstraints = NO;
[self.view addSubview:one];

UIView *two = [[UIView alloc]init];
two.backgroundColor = [UIColor blueColor];
two.translatesAutoresizingMaskIntoConstraints = NO;
[self.view addSubview:two];

UIView *three = [[UIView alloc]init];
three.backgroundColor = [UIColor yellowColor];
three.translatesAutoresizingMaskIntoConstraints = NO;
[self.view addSubview:three];

NSDictionary *metrics = @{@"height":@50.0};
NSDictionary *views = NSDictionaryOfVariableBindings(one,two,three);

[self.view addConstraints:[NSLayoutConstraint
                           constraintsWithVisualFormat:@"|-[one]-|"
                           options: 0
                           metrics:metrics
                           views:views]];


[self.view addConstraints:[NSLayoutConstraint
                           constraintsWithVisualFormat:@"V:|-[one]-[two(300)]-[three(100)]-|"
                           options:NSLayoutFormatAlignAllLeft | NSLayoutFormatAlignAllRight
                           metrics:metrics
                           views:views]];

请参阅本教程（http://commandshift.co.uk/blog/2013/01/31/visual-format-language-for-autolayout/）作为解释

为了帮助我，我为UIView开发了一个类别：https://github.com/damienromito/UIView-UpdateAutoLayoutConstraints（能够隐藏/显示自动布局视图）

如何确保使用Autolayout清洁堆叠多个动态UIView

2 个答案: