iOS Mutable集合“古怪”问题备忘

for
(car_info *car in [DataManagerdefaultManager].xyscData.cart.currentOrder.selectItems)
{

[[NSNotificationCenter
defaultCenter]
postNotificationName:kNotifDidSelectCar

object:car];

}

在自定义通知中，对这个selectItems集合进行了修改，元素只有一个还好，多了就报错了，类似这个：

Terminating app due to uncaught exception 'NSGenericException',
reason: '*** Collection <__NSCFDictionary: 0x597b3d0> was
mutated while being enumerated.

解决方案：用个临时备份来做就好了。

// 这个临时的数组，解决遍历与插入删除同时进行问题
Terminating app due to uncaught exception 'NSGenericException',
reason: '*** Collection <__NSCFDictionary: 0x597b3d0> was
mutated while being enumerated.

NSArray *arResume = [NSArray arrayWithArray:[DataManager defaultManager].xyscData.cart.currentOrder.selectItems];

for (car_info *car in arResume) {

[[NSNotificationCenter
defaultCenter]
postNotificationName:kNotifDidSelectCar

object:car];

}