這個問題是比較舊的,但我來到它,因爲我也有類似的問題,所以對於任何人誰仍然需要一個解決方案。我設法找出使用下面的代碼獲得的總曲目數和軌道號的方式:
NSString *value = @"<0000000a 00140000>" //[item stringValue] (in this case 10/20)
NSString *track_no_hex = [[value componentsSeparatedByString:@" "][0] stringByReplacingOccurrencesOfString:@"<" withString:@""];
NSString *total_track_no_hex = [[value componentsSeparatedByString:@" "][1] stringByReplacingOccurrencesOfString:@">" withString:@""];
NSString *track_no = @"";
for(int k=0;k<=4;k+=4){
unsigned result = 0;
NSScanner *scanner = [NSScanner scannerWithString:[track_no_hex substringWithRange:NSMakeRange(k, 4)]];
[scanner scanHexInt:&result];
if(result == 00){
}
else{
track_no = [NSString stringWithFormat:@"%@%u",track_no,result];
}
}
NSString *total_track_no = @"";
for(int k=0;k<=4;k+=4){
unsigned result = 0;
NSScanner *scanner;
if(k+4<=[total_track_no_hex length]){
scanner = [NSScanner scannerWithString:[total_track_no_hex substringWithRange:NSMakeRange(k, 4)]];
}
else{
}
[scanner scanHexInt:&result];
if(result == 00){
}
else{
total_track_no = [NSString stringWithFormat:@"%@%u",total_track_no,result];
}
}
NSLog(@"%@/%@",track_no, total_track_no); // Output 10/20
這將工作14461下罰款軌道號應該是足夠大,考慮到iTunes中最大的軌道數999
我很抱歉,但我不明白你的問題。請在代碼中告訴我們你在做什麼。 – sosborn 2012-04-24 06:44:40