ios - 获取音频持续时间字符串的浮点值

Question

{
     duration = "00:06:29";
     id = 7;
}

NSNumberFormatter *numberFormatter = [[NSNumberFormatter alloc] init];
    numberFormatter.numberStyle = NSNumberFormatterDecimalStyle;

float value = [numberFormatter numberFromString:currentAutio.duration].floatValue;
NSLog(@"Current audio %f",value);

输出是当前音频0.0000

如何将持续时间字符串转换为浮点值？

Answer 1

最简单的方法是

NSString *duration = @"00:06:29";
NSArray *array = [duration componentsSeparatedByString:@":"];

NSLog(@"Current hrs %ld",(long)[(NSString *)(array[0]) integerValue]);
NSLog(@"Current min %ld",(long)[(NSString *)(array[1]) integerValue]);
NSLog(@"Current sec %ld",(long)[(NSString *)(array[2]) integerValue]);

否则，您也可以使用 NSDate 和 NSDateFormatter。

编辑

---

使用NSDate，请注意小时部分不应超过 23，否则结果可能不符合预期。

NSString *duration = @"00:06:29";

NSDateFormatter *formatter = [NSDateFormatter new];
formatter.dateFormat = @"HH:mm:ss";

NSDate *date = [formatter dateFromString:duration];

NSCalendar *calendar = [NSCalendar currentCalendar];
NSDateComponents *components = [calendar components:NSCalendarUnitHour | NSCalendarUnitMinute | NSCalendarUnitSecond fromDate:date];
NSLog(@"hrs %ld", (long)components.hour);
NSLog(@"min %ld", (long)components.minute);
NSLog(@"sec %ld", (long)components.second);