iOS Autolayout具有多个具有动态高度的视图

Question

I'm trying to achieve the following:

MyViewcontroller

• MyCustomTextField (height 50)
• MyCustomTextField (height 50)
• MyCustomTextField (height 50)

Now that is easier enough in an XIB file.

However, I want to be able call something like MyCustomTextField showError:@"an error" and this to change the height (to say 80) of the related field (animated).

Can someone describe how to do this with Autolayout? My main issue is ensuring the other 'MyCustomTextField's move down at the same time, as the height of the previous field will have increased.

Any help or pointers would be appreciated.

Answer 1

You can try the below approach;

1. Create IBOutlet's for the height constraint of each textfield(your custom textfield). You can then programmatically update the constraints constant according to the text size.
2. Apply vertical spacing constraints between the textfields. So that the textfields will move with respect to their above textfields.

Hope this helps you.

Answer 2

开始工作-我在myviewcontroller中为高度设置了约束，这是错误的，这阻止了它增加高度。