post图片上传php后台接收到的是空(压缩图片)

原因是:

 

#pragma mark -- 压缩图片到 200k以下

 

+(NSData *)imageData:(UIImage *)myimage{

 

    myimage = [self imageWithImageSimple:myimage scaledToSize:CGSizeMake(360,360)];//没有添加这句话,没有给图片尺寸大小

    NSData *data=UIImageJPEGRepresentation(myimage, 1.0);

    

    if (data.length>100*1024) {

        if (data.length>10*1024*1024) {//10M以及以上

            data=UIImageJPEGRepresentation(myimage, 0.01);

        }else if (data.length>5*1024*1024) {//5M以及以上

            data=UIImageJPEGRepresentation(myimage, 0.02);

        }else if (data.length>1024*1024) {//1M以及以上

            data=UIImageJPEGRepresentation(myimage, 0.1);

        }else if (data.length>200*1024) {//0.5M-1M

            data=UIImageJPEGRepresentation(myimage, 0.2);

        }

    }

    NSLog(@"123456789dfdfdfdf%ld",data.length/1024);

    return data;

}

 

//压缩图片

+ (UIImage*)imageWithImageSimple:(UIImage*)image scaledToSize:(CGSize)newSize

{

    // Create a graphics image context

    UIGraphicsBeginImageContext(newSize);

    // Tell the old image to draw in this new context, with the desired

    // new size

    [image drawInRect:CGRectMake(0,0,newSize.width,newSize.height)];

    // Get the new image from the context

    UIImage* newImage = UIGraphicsGetImageFromCurrentImageContext();

    // End the context

    UIGraphicsEndImageContext();

    // Return the new image.

    return newImage;

}