I'm trying to add a left and right NSLayoutConstraint to a view programmatically. Here is my code:
我正在尝试以编程方式向视图添加左右NSLayoutConstraint。这是我的代码:
[self.mainView addConstraints:[NSLayoutConstraint constraintsWithVisualFormat:@"H:|-2.5-[_otherView]-2.5-|" options:0 metrics:nil views:NSDictionaryOfVariableBindings(self.otherView)]];
I get the following error when I run the app:
运行应用程序时出现以下错误:
Terminating app due to uncaught exception 'NSInvalidArgumentException', reason: 'Unable to parse constraint format:
_otherView is not a key in the views dictionary.
1 个解决方案
#1
Your argument to NSDictionaryOfVariableBindings should be _otherView.
你对NSDictionaryOfVariableBindings的论证应该是_otherView。
It needs to be an exact string match to the way you refer to it in the constraint visual format.
它必须与您在约束可视格式中引用它的方式完全匹配。
#1
Your argument to NSDictionaryOfVariableBindings should be _otherView.
你对NSDictionaryOfVariableBindings的论证应该是_otherView。
It needs to be an exact string match to the way you refer to it in the constraint visual format.
它必须与您在约束可视格式中引用它的方式完全匹配。