如何在iOS中将字节数组转换为图像 [英] how to convert byte array to image in ios

问题描述

今天我的任务是将字节数组转换为图像

today my task is convert byte array to image

首先，我尝试将图像转换为字节数组:-

First I try to convert image to byte array :-

要将图像转换为字节数组，首先要做的是将特定的图像[UIImage]转换为NSData.然后，将NSData转换为字节数组.在这里，我将给出示例代码，只需通过...

For converting Image to Byte array first we have to do is to convert that particular image [UIImage] to NSData.Then we will convert that NSData to Byte array. Here I will give the sample code, just go through...

//Converting UIImage to NSData
    UIImage *image = [UIImage imageNamed: @"photo-04.jpg"];

    NSData *imageData = UIImagePNGRepresentation(image);

    //Converting NSData to Byte array
    NSUInteger len = [imageData length];
    NSLog(@"Byte Lendata1  %lu",(unsigned long)len);

    Byte *byteData = (Byte*)malloc(len);
    memcpy(byteData, [imageData bytes], len);

我很喜欢这样将字节转换为imageView

i am try like this Convert byte to imageView

 const unsigned char *bytes = [imageData bytes];

    NSUInteger length = [imageData length];

    NSMutableArray *byteArray = [NSMutableArray array];

    for (NSUInteger i = 0; i < length; i++) {
        [byteArray addObject:[NSNumber numberWithUnsignedChar:bytes[i]]];
    }
    NSDictionary *dictJson = [NSDictionary dictionaryWithObjectsAndKeys:
                              byteArray, @"photo",
                              nil];
    NSData *jsonData = [NSJSONSerialization dataWithJSONObject:dictJson options:0 error:NULL];
    NSLog(@"");
    UIImage *image1 = [UIImage imageWithData:jsonData];

    UIImageView *imgView = [[UIImageView alloc] initWithFrame:CGRectMake(10, 10, 100, 50)];


    imgView.image=image1;

我有输出将图像转换为字节数组，但我想将字节数组转换为图像 所以请帮我谢谢.

I got output convert image to byte array but i want convert byte array to image so please help me thanks in advanced.

推荐答案

首先，您需要将字节转换为NSData

First, you need to convert bytes to NSData

NSData *imageData = [NSData dataWithBytes:bytesData length:length];

然后，将数据转换回图像.

Then, convert the data back to image.

UIImage *image = [UIImage imageWithData:imageData];

我建议您在出现问题时首先搜索文档.

And I suggest you should first searching about the documentations when problems occur.

仅此而已:

UIImage *image = [UIImage imageNamed:@"RAC.png"];

NSData *imageData = UIImagePNGRepresentation(image);
// UIImageJPGRepresentation also work

NSInteger length = [imageData length];

Byte *byteData = (Byte*)malloc(length);
memcpy(byteData, [imageData bytes], length);

NSData *newData = [NSData dataWithBytes:byteData length:length];

UIImage *newImage = [UIImage imageWithData:newData];

UIImageView *imageView = [[UIImageView alloc] initWithImage:newImage];
imageView.frame = CGRectMake(50, 50, 100, 100);
[self.view addSubview:imageView];

这篇关于如何在iOS中将字节数组转换为图像的文章就介绍到这了，希望我们推荐的答案对大家有所帮助，也希望大家多多支持IT屋！