如何正确地将NSNumber转换为long long int？

Question

即时通讯试图将NSNumber转换为long long int但是我得到了意想不到的值..我做错了什么？

NSNumber *number = [[NSNumber alloc] initWithInt:60];
if ([self isTimeOver:number]) {
    [self sendPushTest];
}

-(BOOL)isTimeOver: (NSNumber*) interval {
    long long int theInterval = (long long int)interval;
    NSLog(@"THE INTERVAL %lld",theInterval); // I get -5764607523034233918 here.
}

Answer 1

使用-longLongValue自long long int并且long long是相同的.

long long int theInterval = [interval longLongValue];

你永远不应该只尝试将NSNumbers转换为原始类型(这样做会导致你得到的垃圾数).查看文档以获取更多信息.