小编Moh*_*him的帖子

以下是代码:

NSData * imageData = [NSData dataWithContentsOfURL:imageURL];                

 [imageData writeToFile:savedImagePath options:NSDataWritingAtomic error:&error];
                            if(error != nil)
 NSLog(@"write error %@", error);   

错误:

 write error Error Domain=NSCocoaErrorDomain Code=4 "The operation couldn’t be completed. (Cocoa error 4.)" UserInfo=0x8b7b850 {NSUnderlyingError=0x8b7d7c0 "The operation couldn’t be completed. No such file or directory", NSFilePath=/Users/alfa-1/Library/Application Support/iPhone Simulator/6.0/Applications/C24B228A-599E-4249-97A7-17775E8A546B/Library/Caches/ChannelListImages/http:/direct.domain.com/files/icons/1-all-cb.jpg, NSUserStringVariant=Folder}

我试图从数组中删除重复的对象.

 NSMutableArray* filterResults = [[NSMutableArray alloc] init];
    BOOL copy;

    // remove duplicate
    if (![arrSelectedVehicle count] == 0)
    {
        for (Vehicles *a1 in arrSelectedVehicle) {
            copy = YES;
            for (Vehicles *a2 in filterResults) {
                if ([a1.Vehicle_id isEqualToString:a2.Vehicle_id]) {
                    copy = NO;
                    [arrSelectedVehicle removeObjectIdenticalTo:a2];
                    break;
                }
            }
            if (copy) {
                [filterResults addObject:a1];
            }
        }
    }

我正在添加两个已经在数组中的对象

下面是我的代码我无法播放SnareHitSample.wav文件.我不知道我哪里出错了.

-(void)playAudioFiles
{
    NSString * path;
    AVAudioPlayer * snd;
    NSError * err;
    NSString *name;
    name = @"SnareHitSample.wav";
    path = [[[NSBundle mainBundle] resourcePath] stringByAppendingPathComponent:name];

    if ([[NSFileManager defaultManager] fileExistsAtPath:path]) {
        NSURL * url = [NSURL fileURLWithPath:path];
        snd = [[AVAudioPlayer alloc] initWithContentsOfURL:url
                                                      error:&err] ;
        if (! snd) {
            NSLog(@"Sound named '%@' had error %@", name, [err localizedDescription]);
        } else {
            [snd prepareToPlay];
        }
    } else {
        NSLog(@"Sound file '%@' doesn't exist at '%@'", name, path);
    }
}