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zhangkn/nonatomic.m

Last active May 4, 2018 06:18
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atomic：原子属性，为setter方法加锁（默认就是atomic）
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nonatomic.m
// OC在定义属性时有nonatomic和atomic两种选择
1)atomic：原子属性，为setter方法加锁（默认就是atomic）
2)nonatomic：非原子属性，不会为setter方法加锁
//一、原子和非原子属性的选择
1、nonatomic和atomic对比
1）atomic：线程安全，需要消耗大量的资源
2）nonatomic：非线程安全，适合内存小的移动设备
//2、 iOS开发的建议
1）所有属性都声明为nonatomic
2）尽量避免多线程抢夺同一块资源
3）尽量将加锁、资源抢夺的业务逻辑交给服务
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