Ios 照片在保存到目录时替换

我正在使用代码

NSArray *directoryNames = [NSArray arrayWithObjects:@"hats",@"bottoms",@"right",@"left",nil];
    NSArray *paths = NSSearchPathForDirectoriesInDomains(NSDocumentDirectory, NSUserDomainMask, YES);
    NSString *documentsDirectory = [paths objectAtIndex:0]; // Get documents folder

    for (int i = 0; i < [directoryNames count] ; i++) {
        NSString *dataPath = [documentsDirectory stringByAppendingPathComponent:[directoryNames objectAtIndex:i]];
        if (![[NSFileManager defaultManager] fileExistsAtPath:dataPath])
            [[NSFileManager defaultManager] createDirectoryAtPath:dataPath withIntermediateDirectories:NO attributes:nil error:nil]; //Create folder

        NSString *folderPath = [documentsDirectory stringByAppendingPathComponent:@"hats"]; // "right" is at index 2, per comments & code
        NSString *filePath = [folderPath stringByAppendingPathComponent:@"IMAGE_NAME_HERE.PNG"]; 
        NSData *imageData = UIImagePNGRepresentation(captureImage.image);
        [imageData writeToFile:filePath atomically:YES];
    }

NSArray*directoryNames=[NSArray数组中的对象：@“hats”、@“bottoms”、@“right”、@“left”、nil]；
NSArray*Path=NSSearchPathForDirectoriesInDomains（NSDocumentDirectory，NSUserDomainMask，是）；
NSString*documentsDirectory=[paths objectAtIndex:0]；//获取文档文件夹
对于（int i=0；i<[directoryNames计数]；i++）{
NSString*dataPath=[DocumentsDirectoryStringByAppendingPathComponent:[directoryNames objectAtIndex:i]]；
如果（！[[NSFileManager defaultManager]fileExistsAtPath:dataPath]）
[[NSFileManager defaultManager]createDirectoryAtPath:dataPath with IntermediateDirectory:无属性：nil错误：nil]；//创建文件夹
NSString*folderPath=[DocumentsDirectoryStringByAppendingPathComponent:@“hats”]；/“right”位于索引2，根据注释和代码
NSString*filePath=[folderPath stringByAppendingPathComponent:@“IMAGE_NAME_HERE.PNG”]；
NSData*imageData=UIImagePNGRepresentation（captureImage.image）；
[imageData WriteFile:文件路径原子：是]；
}

---

保存，但它总是替换自己，所以我不能保存多张照片。我应该如何使它停止这样做而不复制自己

根据以下代码，您总是保存到同一个位置：

NSString *folderPath = [documentsDirectory stringByAppendingPathComponent:@"hats"]; // "right" is at index 2, per comments & code
        NSString *filePath = [folderPath stringByAppendingPathComponent:@"IMAGE_NAME_HERE.PNG"]; 
        NSData *imageData = UIImagePNGRepresentation(captureImage.image);
        [imageData writeToFile:filePath atomically:YES];

在数组中循环只是每次都将所有内容保存到“hats”路径。您已经通过dataPath对象基于数组对象计算了存储图像的位置。你只是没有用它做任何事。相反，请执行以下操作：

for (int i = 0; i < [directoryNames count] ; i++) {
        NSString *dataPath = [documentsDirectory stringByAppendingPathComponent:[directoryNames objectAtIndex:i]];
        if (![[NSFileManager defaultManager] fileExistsAtPath:dataPath])
            [[NSFileManager defaultManager] createDirectoryAtPath:dataPath withIntermediateDirectories:NO attributes:nil error:nil]; //Create folder
        [imageData writeToFile:dataPath atomically:YES];
    }

for（int i=0；i<[directoryNames count]；i++）{
NSString*dataPath=[DocumentsDirectoryStringByAppendingPathComponent:[directoryNames objectAtIndex:i]]；
如果（！[[NSFileManager defaultManager]fileExistsAtPath:dataPath]）
[[NSFileManager defaultManager]createDirectoryAtPath:dataPath with IntermediateDirectory:无属性：nil错误：nil]；//创建文件夹
[imageData WriteFile:数据路径原子：是]；
}