Mac ABRecord setValue forProperty错误

Question

当我像这样使用AddressBook时：

ABAddressBook *ab = [ABAddressBook addressBook];  
ABPerson *person = [[ABPerson alloc]init];  
[person setValue:lastName forProperty:kABLastNameProperty];  
[ab addRecord:person];  
[ab save];

我收到错误：

`Terminating app due to uncaught exception 'NSInvalidArgumentException',reason: '-[__NSCFString count]: unrecognized selector sent to instance 0x1001448a0'`

setValue:forProperty是做什么的

Answer 1

看起来问题出在

-[__NSCFString count]

setValue:forProperty设置属性的值。看起来问题可能出在您试图设置的lastName对象上。