//NavigationBar的title颜色改变代码：
[self.navigationController.navigationBar setTitleTextAttributes:@{NSFontAttributeName:[UIFont systemFontOfSize:19],NSForegroundColorAttributeName:[UIColor whiteColor]}];
//使navigationController的背景颜色为白色
- //放在最下面（放一个uiview在上面）
UIView *navigView = [[UIView alloc]initWithFrame:CGRectMake(0, 0, kWidth, 64)];
navigView.backgroundColor = [UIColor colorWithWhite:0 alpha:0.3];
[self.view addSubview:navigView]; - //隐藏半透明度
self.navigationController.navigationBar.translucent = YES;
self.navigationController.navigationBar.shadowImage = [[UIImage alloc]init];
[self.navigationController.navigationBar setBackgroundImage:[[UIImage alloc]init] forBarMetrics:UIBarMetricsDefault]; - // fileDuration位置应该是一个为double类型的歌曲时长秒数
//时间类型
NSDate *date = [[NSDate alloc] initWithTimeIntervalSince1970:fileDuration];
NSDateFormatter *formatter = [[NSDateFormatter alloc] init];
if (fileDuration >= 3600) {
[formatter setDateFormat:@"HH:mm:ss"];
} else {
[formatter setDateFormat:@"mm:ss"];
}
NSString *dateStr = [formatter stringFromDate:date];
