IOS constraint conflict How to solve _ios

iOS constraint conflicts generally fall into two categories: Margin constraint conflicts or dimension collisions, which can often be modified by modifying the constraint precedence of one of the controls, using the content hugging/content Compression resistance, The prerequisite for use is to determine the size of its control, which is generally used after the AutoLayout is successfully constrained.

To set the maximum priority, you can ensure that another constraint is changed when a constraint conflict occurs, as long as the control priority is set higher than the other.

-(void) Setcontenthuggingpriority: (uilayoutpriority) Priority foraxis: (uilayoutconstraintaxis) axis Ns_available_ IOS (6_0);

In the same way, you can set the control's minimum precedence.

-(void) Setcontentcompressionresistancepriority: (uilayoutpriority) Priority foraxis: (uilayoutconstraintaxis) axis Ns_available_ios (6_0);

* Intrinsic Content size: intrinsic size, controls such as UIView have their own intrinsic size.

Also attached:

Otherwise, the 6/6plus is inaccurate 
self.label.preferredMaxLayoutWidth = screen_width-40;

The above is a small set to introduce the iOS constraints of the solution to the conflict, I hope to help you, if you have any questions please give me a message, small series will promptly reply to everyone. Here also thank you very much for the cloud Habitat Community website support!