iOS中的NSNumber等效错误
我试图在范围内找到信标,并对UITableViewCells进行排序。 我正在尝试这个iOS中的NSNumber等效错误,ios,objective-c,if-statement,for-loop,nsnumber,Ios,Objective C,If Statement,For Loop,Nsnumber,我试图在范围内找到信标,并对UITableViewCells进行排序。 我正在尝试这个 NSLog(@"Trying (%@ = %@, %@ = %@)",major, beacon1.major,minor, beacon1.minor); if(beacon1.major == major && beacon1.minor == minor){ NSLog(@"%@;%@ is first",major,minor);
NSLog(@"Trying (%@ = %@, %@ = %@)",major, beacon1.major,minor, beacon1.minor);
if(beacon1.major == major && beacon1.minor == minor){
NSLog(@"%@;%@ is first",major,minor);
[room insertObject:room atIndex:0];
}
这意味着,如果NSNumber MARY和NSNumber MARY等于找到的信标,则将运行if。
NSLog重新运行此:
2015-01-02 12:33:02.277 App[468:30045] Trying (47566000 = 47566, 39534000 = 39534)
2015-01-02 12:33:02.278 App[468:30045] Trying (47566000 = 47566, 39534000 = 39534)
2015-01-02 12:33:02.279 App[468:30045] Trying (47566 = 47566, 39534 = 39534)
我以后会期待它第三次运行。但事实并非如此
有人知道这里发生了什么吗?您正在比较的是变量实例相等性,而不是包含的值 改为使用isEqualToNumber: 代码应该如下所示:
if ([beacon1.major isEqualToNumber:major] && [beacon1.minor isEqualToNumber:minor]) {
...
}