保存图片到沙盒并从沙盒中取出

- (void)saveImage:(UIImage *)tempImage WithName:(NSString *)imageName

{

    NSData * imageData = UIImagePNGRepresentation(tempImage);

    NSArray * paths = NSSearchPathForDirectoriesInDomains(NSDocumentDirectory, NSUserDomainMask, YES);

    NSString * documentsDirectory = [paths objectAtIndex:0];

    // Now we get the full path to the file

    NSString * fullPathToFile = [documentsDirectory stringByAppendingString:imageName];

    // and then we write it out

    [imageData writeToFile:fullPathToFile atomically:NO];

    

//    NSLog(@"路径：%@", [NSHomeDirectory() stringByAppendingPathComponent:@"Documents1.png"]);

    

    

    // 将存入到沙盒的图片再取出来，目的是为了进行上传

    NSLog(@"fullPathToFile:%@", fullPathToFile);

    NSString * path = fullPathToFile;

    // 二进制的数据就可以进行上传

    NSData * data = [NSData dataWithContentsOfFile:path];

    UIImage * image = [UIImage imageWithData:data];

    self.postImage.image = image;

}