iOS主动抛出异常@throw

有时候调试需求，需要人为的抛出异常，使程序崩溃退出，这时候就用到@throw

@throw [NSException exceptionWithName:@"context show" reason:@"crush's reason" userInfo:nil];

运行程序会出现如下打印：

Terminating app due to uncaught exception 'context show', reason: 'crush's reason'