当我尝试使用自动布局添加所有视图时,出现以下消息:
CRASH Unable to install constraint on view.
Does the constraint reference something from outside the subtree of the view?
That's illegal.
constraint:<NSLayoutConstraint:0x756b510 UIPickerView:0x756f220.top ==
LoginView:0x75e9d30.top + 106> view:<LoginView: 0x75e9d30;
frame = (0 15; 320 430); autoresize = RM+BM; layer = <CALayer: 0x75e9dc0>>
有人有想法吗?