Question

两次之间有if语句的最简单方法是什么？例如：

if ([timeisBetween=1:00 and 8:40]) {
    NSLog(@"Inside time period");
}
else {
    NSLog(@"Not in time period - after 8:30 in the morning")
}

和

if ([timeisBetween=22:00 and 5:40]) {
    NSLog(@"Inside time period 10:00 at night to 5:40 in the morning");
}
else {
    NSLog(@"Not in time period");
}

Answer 1

通过NSDateFormatter将NSStrings转换为NSDates，然后进行比较。确保您的NSDate介于这些范围之间。这些片段将帮助您指明正确的方向。

NSDateFormatter *formatter = [[NSDateFormatter alloc] init];
    [formatter setDateFormat:@"yyyy-MM-dd HH:mm:ss"];

NSDate *startDate = [formatter dateFromString:@"2014-17-03 6:45:58"];
NSDate *endDate = [formatter dateFromString:@"2014-17-03 8:45:58"];

if ([startDate compare: endDate] == NSOrderedDescending) {
    NSLog(@"start is later than end");

} else if ([startDate compare:endDate] == NSOrderedAscending) {
    NSLog(@"start is earlier than end");

} else {
    NSLog(@"Same Dates");

}

如果在两天之间发表声明

1 个答案: