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Unbalanced calls to Begin/end appearance transitio

Source: Internet
Author: User
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unbalanced calls to Begin/end appearance transition for ....

When the two view controllers are pushed almost simultaneously to the current navigation controller stack, or if the pop has two different view controllers at the same time, an indeterminate result occurs. So we should make sure that there is only one operation on the same navigation controller stack at the same time, even if the current view controller is being animated, it should not go to push or pop a new view controller. So finally we put the data request of the Web activity into the viewdidappear, and did some processing, so the problem solved.


Unbalanced calls to Begin/end appearance transitio

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