iOS杂记-告警清理

NS_ASSUME_NONNULL_BEGIN
@interface Robot : NSObject
@property (copy,readonly) NSString *name;
- (nullable instancetype)initWithName:(NSString *)name;
- (nullable NSString *)tellMeSomething;
@end
NS_ASSUME_NONNULL_END

来源：https://www.cnblogs.com/zhang-pengcheng/p/11797627.html