这篇博客用于实现iOS客户端通过POST请求，将图片上传到服务器上。服务器端语言采用PHP，服务器环境使用MAMP搭建。先使用浏览器测试图片是否可以上传，浏览器测试成功之后再测试iOS客户端是否可以成功上传图片。
服务端代码：
upload_file.php
<?php if ((($_FILES["file"]["type"] == "image/gif")
|| ($_FILES["file"]["type"] == "image/jpeg")
|| ($_FILES["file"]["type"] == "image/pjpeg"))
&& ($_FILES["file"]["size"] < 20000000))
{
if ($_FILES["file"]["error"] > 0)
{
echo "Return Code: " . $_FILES["file"]["error"] . "<br />";
}
else
{
echo "Upload: " . $_FILES["file"]["name"] . "<br />";
echo "Type: " . $_FILES["file"]["type"] . "<br />";
echo "Size: " . ($_FILES["file"]["size"] / 1024) . " Kb<br />";
echo "Temp file: " . $_FILES["file"]["tmp_name"] . "<br />"; if (file_exists("upload/" . $_FILES["file"]["name"]))
{
echo $_FILES["file"]["name"] . " already exists. ";
}
else
{
move_uploaded_file($_FILES["file"]["tmp_name"],
"upload/" . $_FILES["file"]["name"]);
echo "Stored in: " . "upload/" . $_FILES["file"]["name"];
}
}
}
else
{
echo "Invalid file";
}
?>
浏览器测试代码：
upload.html
<html>
<body> <form action="upload_file.php" method="post"
enctype="multipart/form-data">
<label for="file">Filename:</label>
<input type="file" name="file" id="file" />
<br />
<input type="submit" name="submit" value="Submit" />
</form> </body>
</html>
MAMP服务器的目录结构如下：(新建一个upload文件夹用于存放图片，将upload文件夹和upload.html、upload_file.php放在同一个目录下)
iOS客户端代码：
ViewController.m
#import "ViewController.h" static NSString *boundry = @"----------V2ymHFg03ehbqgZCaKO6jy";//设置边界 @interface ViewController ()<UINavigationControllerDelegate, UIImagePickerControllerDelegate,NSURLSessionTaskDelegate>
@end @implementation ViewController - (void)viewDidLoad {
[super viewDidLoad];
// Do any additional setup after loading the view, typically from a nib.
} - (void)didReceiveMemoryWarning {
[super didReceiveMemoryWarning];
// Dispose of any resources that can be recreated.
} #pragma mark-打开相册
- (IBAction)openAlbumClicked:(UIButton *)sender { UIImagePickerController *picController = [[UIImagePickerController alloc] init]; picController.delegate = self; [self presentViewController:picController animated:YES
completion:nil]; } #pragma mark-代理方法
- (void)imagePickerController:(UIImagePickerController *)picker didFinishPickingMediaWithInfo:(NSDictionary<NSString *,id> *)info{ NSLog(@"选择图片:\n%@",info); [self uploadDataWithImage:info[@"UIImagePickerControllerOriginalImage"]]; [picker dismissViewControllerAnimated:YES completion:nil];
} /**
上传图片
*/
- (void)uploadDataWithImage:(UIImage *)img{ NSURL *url = [NSURL URLWithString:@"http://10.51.3.160:8888/upload_file.php"];
NSMutableURLRequest *urlRequest = [[NSMutableURLRequest alloc] initWithURL:url cachePolicy:NSURLRequestUseProtocolCachePolicy timeoutInterval:]; //设置Method
urlRequest.HTTPMethod = @"POST"; //4.设置请求头
//在请求头中添加content-type字段
NSString *contentType = [NSString stringWithFormat:@"multipart/form-data; charset=utf-8;boundary=%@",boundry];
[urlRequest setValue:contentType forHTTPHeaderField:@"Content-Type"]; NSURLSessionConfiguration *config = [NSURLSessionConfiguration defaultSessionConfiguration]; //NSURLSession
NSURLSession *session = [NSURLSession sessionWithConfiguration:config delegate:self delegateQueue:[[NSOperationQueue alloc]init]]; //定义上传操作
NSURLSessionUploadTask *uploadTask = [session uploadTaskWithRequest:urlRequest fromData:[self getBodydataWithImage:img] completionHandler:^(NSData * _Nullable data, NSURLResponse * _Nullable response, NSError * _Nullable error) {
NSLog(@"响应结果:%@", response);
NSString *str = [[NSString alloc] initWithData:data encoding:NSUTF8StringEncoding];
NSLog(@"返回数据:\n%@",str);
}]; [uploadTask resume];
} - (NSData *)getBodydataWithImage:(UIImage *)image
{
//把文件转换为NSData
NSData *fileData = UIImageJPEGRepresentation(image, 0.8); //文件名
NSString *fileName=@"test"; //1.构造body string
NSMutableString *bodyString = [[NSMutableString alloc] init]; //2.拼接body string
//(1)file_name
[bodyString appendFormat:@"--%@\r\n",boundry];
[bodyString appendFormat:@"Content-Disposition: form-data; name=\"FileName\"\r\n"];
[bodyString appendFormat:@"Content-Type: text/plain; charset=\"utf-\"\r\n\r\n"];
[bodyString appendFormat:@"aaa%@.jpg\r\n",fileName]; //(2)PostID
// [bodyString appendFormat:@"--%@\r\n",boundry];
// [bodyString appendFormat:@"Content-Disposition: form-data; name=\"PostID\"\r\n"];
// [bodyString appendFormat:@"Content-Type: text/plain; charset=\"utf-8\"\r\n\r\n"];
// [bodyString appendFormat:@"%@\r\n",self.uuID]; //(3)pic
[bodyString appendFormat:@"--%@\r\n",boundry];
[bodyString appendFormat:@"Content-Disposition: form-data; name=\"file\"; filename=\"%@.jpg\"\r\n",fileName];
[bodyString appendFormat:@"Content-Type: image/jpeg\r\n\r\n"];
//[bodyString appendFormat:@"Content-Type: application/octet-stream\r\n\r\n"]; //3.string --> data
NSMutableData *bodyData = [NSMutableData data];
//拼接的过程
//前面的bodyString, 其他参数
[bodyData appendData:[bodyString dataUsingEncoding:NSUTF8StringEncoding]];
//图片数据
[bodyData appendData:fileData]; //4.结束的分隔线
NSString *endStr = [NSString stringWithFormat:@"\r\n--%@--\r\n",boundry];
//拼接到bodyData最后面
[bodyData appendData:[endStr dataUsingEncoding:NSUTF8StringEncoding]]; return bodyData;
} - (void)URLSession:(NSURLSession *)session task:(NSURLSessionTask *)task didSendBodyData:(int64_t)bytesSent totalBytesSent:(int64_t)totalBytesSent totalBytesExpectedToSend:(int64_t)totalBytesExpectedToSend{ CGFloat progress = totalBytesSent * 1.0 / totalBytesExpectedToSend;
NSLog(@"上传进度:%f%%",progress*); } /*
上传成功
*/
- (void)URLSession:(NSURLSession *)session task:(NSURLSessionTask *)task didCompleteWithError:(NSError *)error{
NSLog(@"上传成功! Error:%@",error);
} @end