Question

我正在从服务器检索数据 - 其中使用的NS号包含数据库格式的BOOL值。但是当我尝试使用TRUE或FALSE时，它确实允许这样做。 - 我是Xcode的初学者。

for (unsigned int i =0; i<studentDashBoardDetails.count; i++) {

            // Early CheckOut Days
    if ([[[ studentDashBoardDetails objectAtIndex:i]objectForKey:@"dayType"]isEqualToString: @"Working"]&&[[[studentDashBoardDetails objectAtIndex:i]objectForKey:@"isAttended"]isEqualToNumber:[NSNumber numberWithInt:1]]&&[[[studentDashBoardDetails objectAtIndex:i]objectForKey:@"timeSpent"]isLessThan:@"08.00.00"])
        {
            NSLog(@" Early Check out on   %@",[[studentDashBoardDetails objectAtIndex:i]objectForKey:@"attendanceDate"]);

Answer 1

NSNumber numberWithInt返回当前值的签名integer，以访问可以使用NSNumber numberWithBool方法的bool值，它会创建一个对象并返回NSNumber，可以对其进行处理作为bool。

我希望它能帮助您找到解决问题的正确方法

Answer 2

保存时保存为NSNumber

    NSNumber *isAttended = [[studentDashBoardDetails objectAtIndex:i]objectForKey:@"isAttended"];

在阅读时你会像这样做你的情况

if (isAttended.boolValue){
    //true
}else{
   //false
}

在你的情况下，你必须这样做

if ([[[ studentDashBoardDetails objectAtIndex:i]objectForKey:@"dayType"]isEqualToString: @"Working"] && isAttended.boolValue &&[[[studentDashBoardDetails objectAtIndex:i]objectForKey:@"timeSpent"]isLessThan:@"08.00.00"])
        {
            NSLog(@" Early Check out on   %@",[[studentDashBoardDetails objectAtIndex:i]objectForKey:@"attendanceDate"]);
}

在Xcode中使用“NSNumber numberWithInt”是什么？

2 个答案: