after collectionview adds a cell, but closes the APP, what do you want to do with the data source when you open the cell, and find that it has not been added?
after collectionview adds a cell, but closes the APP, what do you want to do with the data source when you open the cell, and find that it has not been added?
Please describe it in detail and attach the detailed code
for example, if a button becomes unavailable after it is clicked, it can not be clicked until the next day, so the button can only be clicked once a day, such as check-in, so how to update the status of the button at zero? ...
CAShapeLayer plus UIBezierPath draws an oblique line. You can t click on it. Ask the boss for advice ...