objective-c - @property overrides setter and getter methods

Question

Why can’t I access the _ attribute when I rewrite the getter and setter methods at the same time? How can I rewrite the getter and setter methods at the same time? Please help me!

Answer 1

This will indeed prompt an error, you need to add a line:

@synthesize city = _city;

Answer 2

After encapsulation, attributes can only be accessed through the encapsulation method. Change _city to self.city. I don’t know if that’s right