I would recommend to debug and find which constraint is **"the one you don't want"**. Suppose you have following issue:
![enter image description here][1]
**Always the problem is how to find following Constraints and Views.**
**There are two solutions how to do this:**
1. **DEBUG VIEW HIERARCHY** *(Do not recommend this way)*
Since you know where to find unexpected constraints (PBOUserWorkDayHeaderView) there is a way to do this fairly well. Let's find `UIView` and `NSLayoutConstraint` in red rectangles. Since we know their **id in memory** it is quite easy.
- Stop app using **Debug View Hierarchy**:
![enter image description here][2]
- Find the proper UIView:
![enter image description here][3]
- The next is to find NSLayoutConstraint we care about:
![enter image description here][4]
As you can see, the memory pointers are the same. So we know what is going on now. Additionally you can find `NSLayoutConstraint` in view hierarchy. Since it is selected in View, it selected in Navigator also.
![enter image description here][5]
If you need you may also print it on console using address pointer:
(lldb) po 0x17dce920
<UIView: 0x17dce920; frame = (10 30; 300 24.5); autoresize = RM+BM; layer = <CALayer: 0x17dce9b0>>
You can do the same for every constraint the debugger will point to you:-) Now you decide what to do with this.
2. **PRINT IT BETTER** *(I really recommend this way, this is of Xcode 7)*
- set unique identifier for every constraint in your view:
[![enter image description here][6]][6]
- create simple extension for `NSLayoutConstraint`:
**SWIFT**:
extension NSLayoutConstraint {
override public var description: String {
let id = identifier ?? ""
return "id: \(id), constant: \(constant)" //you may print whatever you want here
}
}
**OBJECTIVE-C**
@interface NSLayoutConstraint (Description)
@end
@implementation NSLayoutConstraint (Description)
-(NSString *)description {
return [NSString stringWithFormat:@"id: %@, constant: %f", self.identifier, self.constant];
}
@end
- build it once again, and now you have more readable output for you:
[![enter image description here][7]][7]
- once you got your `id` you can simple tap it in your **Find Navigator**:
[![enter image description here][8]][8]
- and quickly find it:
[![enter image description here][9]][9]
**HOW TO SIMPLE FIX THAT CASE?**
- try to change **priority** to `999` for broken constraint.
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