In your .h files:
@interface MyClass : NSObject
- (instancetype)init NS_UNAVAILABLE;
@end
In .m files:
@interface MyClass ()
- (instancetype)init NS_DESIGNATED_INITIALIZER;
@end
@implementation MyClass
- (instancetype)init { @throw nil; }
@end
-(instancetype)init
{
self = [super init];
return self;
}
参考文章：
