正确定义UITableViewCell大小调整的约束

Question

我目前正面临这个问题，我需要定义动态高度UITableViewCell。

红线对应于可调整大小的视图（将垂直增长），蓝色标签有3个约束：上面每个立即红色视图两个（＆gt; = 8），另一个具有170，优先级高于superview。

绿色的那个对superview（5）有一个底部约束

当我尝试运行我的代码时，它给了我这个：

Unable to simultaneously satisfy constraints.
Probably at least one of the constraints in the following list is one you don't want. Try this: (1) look at each constraint and try to figure out which you don't expect; (2) find the code that added the unwanted constraint or constraints and fix it. (Note: If you're seeing NSAutoresizingMaskLayoutConstraints that you don't understand, refer to the documentation for the UIView property translatesAutoresizingMaskIntoConstraints) 
(
 "<NSLayoutConstraint:0x19d65bb0 V:[UIView:0x19d9a9a0(5)]>",
 "<NSLayoutConstraint:0x19d667d0 V:[UILabel:0x19de4180(19)]>",
 "<NSLayoutConstraint:0x19d5ba70 V:[UILabel:0x19d61870(19)]>",
 "<NSLayoutConstraint:0x19d36df0 V:[UILabel:0x19d36e80(19)]>",
 "<NSLayoutConstraint:0x19d35d30 V:[UIView:0x19d36130(0)]>",
 "<NSLayoutConstraint:0x19e7b310 V:|-(5)-[UILabel:0x19d6b520]   (Names: '|':UITableViewCellContentView:0x19d97580 )>",
 "<NSLayoutConstraint:0x17d0b060 V:[UILabel:0x19d6b520]-(5)-[UIView:0x19d9a9a0]>",
 "<NSLayoutConstraint:0x17d0a480 V:[UIView:0x19d9a9a0]-(8)-[UILabel:0x19de4180]>",
 "<NSLayoutConstraint:0x17d0c920 V:[UILabel:0x19de4180]-(8)-[UILabel:0x19d61870]>",
 "<NSLayoutConstraint:0x17d0a100 V:[UILabel:0x19d61870]-(8)-[UIView:0x19d839e0]>",
 "<NSLayoutConstraint:0x17d11ad0 V:[UIView:0x19d839e0]-(8)-[UILabel:0x19d36e80]>",
 "<NSLayoutConstraint:0x19e742a0 V:[UILabel:0x19d36e80]-(8)-[UILabel:0x19d36770]>",
 "<NSLayoutConstraint:0x19ed84a0 V:[UILabel:0x19d36770]-(8)-[UIView:0x19d36130]>",
 "<NSLayoutConstraint:0x19e76410 V:[UIView:0x19d36130]-(>=8)-[UILabel:0x19d35560]>",
 "<NSLayoutConstraint:0x19ed8af0 V:[UILabel:0x19d35560]-(8)-[UITextView:0x1832ba00]>",
 "<NSLayoutConstraint:0x19e7abf0 V:[UITextView:0x1832ba00]-(8)-[UILabel:0x19e7d890]>",
 "<NSLayoutConstraint:0x19e83d90 V:[UILabel:0x19e7d890]-(8)-[UITextView:0x18a95e00]>",
 "<NSLayoutConstraint:0x19e7b520 V:[UITextView:0x18a95e00]-(5)-|   (Names: '|':UITableViewCellContentView:0x19d97580 )>",
 "<NSAutoresizingMaskLayoutConstraint:0x19d46fc0 h=--& v=--& V:[UITableViewCellContentView:0x19d97580(0)]>"
)

Will attempt to recover by breaking constraint 
<NSLayoutConstraint:0x19d36df0 V:[UILabel:0x19d36e80(19)]>

Break on objc_exception_throw to catch this in the debugger.
The methods in the UIConstraintBasedLayoutDebugging category on UIView listed in <UIKit/UIView.h> may also be helpful.

所以，问题是： 实现这个目标的正确方法是什么？

Answer 1

您使用storyboard，如果是，请转到Editor->Resolve Auto Layout Issues->Clear All Constraints In ........ Controller，然后Add Missing Constraints In ...... Controller

它将帮助您解决破坏视图之间的矛盾的问题