iOS上传图片

iPhone开发中遇到上传图片问题，找到多资料，最终封装了一个类，请大家指点，代码如下 

// // RequestPostUploadHelper.h // demodes // // Created by 张浩 on 13-5-8. // Copyright (c) 2013年 张浩. All rights reserved. //  #import <Foundation/Foundation.h> @interface RequestPostUploadHelper : NSObject /**
 *POST 提交 并可以上传图片目前只支持单张 */ + (NSString *)postRequestWithURL: (NSString *)url // IN postParems: (NSMutableDictionary *)postParems // IN 提交参数据集合 picFilePath: (NSString *)picFilePath // IN 上传图片路径 picFileName: (NSString *)picFileName; // IN 上传图片名称 /**
 * 修发图片大小 */ + (UIImage *) imageWithImageSimple:(UIImage*)image scaledToSize:(CGSize) newSize; /**
 * 保存图片 */ + (NSString *)saveImage:(UIImage *)tempImage WithName:(NSString *)imageName; /**
 * 生成GUID */ + (NSString *)generateUuidString; @end

// // RequestPostUploadHelper.m // demodes // // Created by 张浩 on 13-5-8. // Copyright (c) 2013年 张浩. All rights reserved. //  #import "RequestPostUploadHelper.h" @implementation RequestPostUploadHelper static NSString * const FORM_FLE_INPUT = @"file"; + (NSString *)postRequestWithURL: (NSString *)url // IN postParems: (NSMutableDictionary *)postParems // IN picFilePath: (NSString *)picFilePath // IN picFileName: (NSString *)picFileName; // IN {
    
   
    NSString *TWITTERFON_FORM_BOUNDARY = @"0xKhTmLbOuNdArY"; //根据url初始化request NSMutableURLRequest* request = [NSMutableURLRequest requestWithURL:[NSURL URLWithString:url]
                                                           cachePolicy:NSURLRequestReloadIgnoringLocalCacheData
                                                       timeoutInterval:10]; //分界线 --AaB03x NSString *MPboundary=[[NSString alloc]initWithFormat:@"--%@",TWITTERFON_FORM_BOUNDARY]; //结束符 AaB03x-- NSString *endMPboundary=[[NSString alloc]initWithFormat:@"%@--",MPboundary]; //得到图片的data NSData* data; if(picFilePath){
     
        UIImage *image=[UIImage imageWithContentsOfFile:picFilePath]; //判断图片是不是png格式的文件 if (UIImagePNGRepresentation(image)) { //返回为png图像。 data = UIImagePNGRepresentation(image);
        }else { //返回为JPEG图像。 data = UIImageJPEGRepresentation(image, 1.0);
        }
    } //http body的字符串 NSMutableString *body=[[NSMutableString alloc]init]; //参数的集合的所有key的集合 NSArray *keys= [postParems allKeys]; //遍历keys for(int i=0;i<[keys count];i++)
    { //得到当前key NSString *key=[keys objectAtIndex:i]; //添加分界线，换行 [body appendFormat:@"%@\r\n",MPboundary]; //添加字段名称，换2行 [body appendFormat:@"Content-Disposition: form-data; name=\"%@\"\r\n\r\n",key]; //添加字段的值 [body appendFormat:@"%@\r\n",[postParems objectForKey:key]];
        
         NSLog(@"添加字段的值==%@",[postParems objectForKey:key]);
    } if(picFilePath){ ////添加分界线，换行 [body appendFormat:@"%@\r\n",MPboundary]; //声明pic字段，文件名为boris.png [body appendFormat:@"Content-Disposition: form-data; name=\"%@\"; filename=\"%@\"\r\n",FORM_FLE_INPUT,picFileName]; //声明上传文件的格式 [body appendFormat:@"Content-Type: image/jpge,image/gif, image/jpeg, image/pjpeg, image/pjpeg\r\n\r\n"];
    } //声明结束符：--AaB03x-- NSString *end=[[NSString alloc]initWithFormat:@"\r\n%@",endMPboundary]; //声明myRequestData，用来放入http body NSMutableData *myRequestData=[NSMutableData data]; //将body字符串转化为UTF8格式的二进制  [myRequestData appendData:[body dataUsingEncoding:NSUTF8StringEncoding]]; if(picFilePath){ //将image的data加入  [myRequestData appendData:data];
    } //加入结束符--AaB03x--  [myRequestData appendData:[end dataUsingEncoding:NSUTF8StringEncoding]]; //设置HTTPHeader中Content-Type的值 NSString *content=[[NSString alloc]initWithFormat:@"multipart/form-data; boundary=%@",TWITTERFON_FORM_BOUNDARY]; //设置HTTPHeader [request setValue:content forHTTPHeaderField:@"Content-Type"]; //设置Content-Length [request setValue:[NSString stringWithFormat:@"%d", [myRequestData length]] forHTTPHeaderField:@"Content-Length"]; //设置http body  [request setHTTPBody:myRequestData]; //http method [request setHTTPMethod:@"POST"];
    
    
    NSHTTPURLResponse *urlResponese = nil;
    NSError *error = [[NSError alloc]init];
    NSData* resultData = [NSURLConnection sendSynchronousRequest:request   returningResponse:&urlResponese error:&error];
    NSString* result= [[NSString alloc] initWithData:resultData encoding:NSUTF8StringEncoding]; if([urlResponese statusCode] >=200&&[urlResponese statusCode]<300){
        NSLog(@"返回结果=====%@",result); return result;
    } return nil;
} /**
 * 修发图片大小 */ + (UIImage *) imageWithImageSimple:(UIImage*)image scaledToSize:(CGSize) newSize{
    newSize.height=image.size.height*(newSize.width/image.size.width);
    UIGraphicsBeginImageContext(newSize);
    [image drawInRect:CGRectMake(0, 0, newSize.width, newSize.height)];
    UIImage *newImage=UIGraphicsGetImageFromCurrentImageContext();
    UIGraphicsEndImageContext(); return newImage;

} /**
 * 保存图片 */ + (NSString *)saveImage:(UIImage *)tempImage WithName:(NSString *)imageName{
    NSData* imageData; //判断图片是不是png格式的文件 if (UIImagePNGRepresentation(tempImage)) { //返回为png图像。 imageData = UIImagePNGRepresentation(tempImage);
    }else { //返回为JPEG图像。 imageData = UIImageJPEGRepresentation(tempImage, 1.0);
    }   
    NSArray* paths = NSSearchPathForDirectoriesInDomains(NSDocumentDirectory,NSUserDomainMask,YES);
    
    NSString* documentsDirectory = [paths objectAtIndex:0];
    
    NSString* fullPathToFile = [documentsDirectory stringByAppendingPathComponent:imageName];

    NSArray *nameAry=[fullPathToFile componentsSeparatedByString:@"/"];
    NSLog(@"===fullPathToFile===%@",fullPathToFile);
    NSLog(@"===FileName===%@",[nameAry objectAtIndex:[nameAry count]-1]);
    
    [imageData writeToFile:fullPathToFile atomically:NO]; return fullPathToFile;
} /**
 * 生成GUID */ + (NSString *)generateUuidString{ // create a new UUID which you own CFUUIDRef uuid = CFUUIDCreate(kCFAllocatorDefault); // create a new CFStringRef (toll-free bridged to NSString) // that you own NSString *uuidString = (NSString *)CFUUIDCreateString(kCFAllocatorDefault, uuid); // transfer ownership of the string // to the autorelease pool  [uuidString autorelease]; // release the UUID  CFRelease(uuid); return uuidString;
} @end

DEMO

// // UploadViewController.h // demodes // // Created by 张浩 on 13-5-6. // Copyright (c) 2013年 张浩. All rights reserved. //  #import <UIKit/UIKit.h> @interface UploadViewController : UIViewController<UIActionSheetDelegate,UIImagePickerControllerDelegate>
- (IBAction)onClickUploadPic:(id)sender; - (void) snapImage;//拍照 - (void) pickImage;//从相册里找 - (UIImage *) imageWithImageSimple:(UIImage*)image scaledToSize:(CGSize) newSize; - (void)saveImage:(UIImage *)tempImage WithName:(NSString *)imageName; - (IBAction)onPostData:(id)sender; - (NSString *)generateUuidString; @end

// // UploadViewController.m // demodes // // Created by 张浩 on 13-5-6. // Copyright (c) 2013年 张浩. All rights reserved. //  #import "UploadViewController.h" #import "RequestPostUploadHelper.h" @interface UploadViewController () @end NSString *TMP_UPLOAD_IMG_PATH=@""; @implementation UploadViewController - (id)initWithNibName:(NSString *)nibNameOrNil bundle:(NSBundle *)nibBundleOrNil
{
    self = [super initWithNibName:nibNameOrNil bundle:nibBundleOrNil]; if (self) { // Custom initialization  } return self;
} - (void)viewDidLoad
{
    [super viewDidLoad]; // Do any additional setup after loading the view from its nib. } - (void)didReceiveMemoryWarning
{
    [super didReceiveMemoryWarning]; // Dispose of any resources that can be recreated. } - (IBAction)onClickUploadPic:(id)sender {
    UIActionSheet *menu=[[UIActionSheet alloc] initWithTitle:@"上传图片" delegate:self cancelButtonTitle:@"取消" destructiveButtonTitle:nil otherButtonTitles:@"拍照上传",@"从相册上传", nil];
    menu.actionSheetStyle=UIActionSheetStyleBlackTranslucent;
    [menu showInView:self.view];
    
} - (void) actionSheet:(UIActionSheet *)actionSheet clickedButtonAtIndex:(NSInteger)buttonIndex{
     NSLog(@"33333333333333"); if(buttonIndex==0){
        [self snapImage];
        NSLog(@"111111111111");
    }else if(buttonIndex==1){
        [self pickImage];
        NSLog(@"222222222222");
    }
    
    [actionSheet release];
} //拍照 - (void) snapImage{
    UIImagePickerController *ipc=[[UIImagePickerController alloc] init];
    ipc.sourceType=UIImagePickerControllerSourceTypeCamera;
    ipc.delegate=self;
    ipc.allowsEditing=NO;
    [self presentModalViewController:ipc animated:YES];
    
} //从相册里找 - (void) pickImage{
    UIImagePickerController *ipc=[[UIImagePickerController alloc] init];
    ipc.sourceType=UIImagePickerControllerSourceTypePhotoLibrary;
    ipc.delegate=self;
    ipc.allowsEditing=NO;
    [self presentModalViewController:ipc animated:YES];
} -(void) imagePickerController:(UIImagePickerController *)picker didFinishPickingMediaWithInfo:(NSDictionary *) info{
    UIImage *img=[info objectForKey:@"UIImagePickerControllerOriginalImage"]; if(picker.sourceType==UIImagePickerControllerSourceTypeCamera){ // UIImageWriteToSavedPhotosAlbum(img,nil,nil,nil);  }
    UIImage *newImg=[self imageWithImageSimple:img scaledToSize:CGSizeMake(300, 300)];
    [self saveImage:newImg WithName:[NSString stringWithFormat:@"%@%@",[self generateUuidString],@".jpg"]];
    [self dismissModalViewControllerAnimated:YES];
    [picker release];

} -(UIImage *) imageWithImageSimple:(UIImage*) image scaledToSize:(CGSize) newSize{
    newSize.height=image.size.height*(newSize.width/image.size.width);
    UIGraphicsBeginImageContext(newSize);
    [image drawInRect:CGRectMake(0, 0, newSize.width, newSize.height)];
    UIImage *newImage=UIGraphicsGetImageFromCurrentImageContext();
    UIGraphicsEndImageContext(); return newImage;
} - (void)saveImage:(UIImage *)tempImage WithName:(NSString *)imageName

{
    NSLog(@"===TMP_UPLOAD_IMG_PATH===%@",TMP_UPLOAD_IMG_PATH);
    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 stringByAppendingPathComponent:imageName]; // and then we write it out TMP_UPLOAD_IMG_PATH=fullPathToFile;
    NSArray *nameAry=[TMP_UPLOAD_IMG_PATH componentsSeparatedByString:@"/"];
    NSLog(@"===new fullPathToFile===%@",fullPathToFile);
    NSLog(@"===new FileName===%@",[nameAry objectAtIndex:[nameAry count]-1]);
    
    [imageData writeToFile:fullPathToFile atomically:NO];
    
} - (IBAction)onPostData:(id)sender {
    NSMutableDictionary * dir=[NSMutableDictionary dictionaryWithCapacity:7]; //[dir setValue:@"save" forKey:@"m"]; [dir setValue:@"IOS上传试试" forKey:@"title"];
    [dir setValue:@"IOS上传试试" forKey:@"content"];
    [dir setValue:@"28" forKey:@"clubUserId"];
    [dir setValue:@"1" forKey:@"clubSectionId"];
    [dir setValue:@"192.168.0.26" forKey:@"ip"];
    [dir setValue:@"asfdfasdfasdfasdfasdfasd=" forKey:@"sid"];
    NSString *url=@"http://192.168.0.26:8090/api/club/topicadd.do?m=save";
    NSLog(@"=======上传"); if([TMP_UPLOAD_IMG_PATH isEqualToString:@""]){
        [RequestPostUploadHelper postRequestWithURL:url postParems:dir picFilePath:nil picFileName:nil];
    }else{
        NSLog(@"有图标上传");
        NSArray *nameAry=[TMP_UPLOAD_IMG_PATH componentsSeparatedByString:@"/"];
       [RequestPostUploadHelper postRequestWithURL:url postParems:dir picFilePath:TMP_UPLOAD_IMG_PATH picFileName:[nameAry objectAtIndex:[nameAry count]-1]];;
    }
 
} - (NSString *)generateUuidString
{ // create a new UUID which you own CFUUIDRef uuid = CFUUIDCreate(kCFAllocatorDefault); // create a new CFStringRef (toll-free bridged to NSString) // that you own NSString *uuidString = (NSString *)CFUUIDCreateString(kCFAllocatorDefault, uuid); // transfer ownership of the string // to the autorelease pool  [uuidString autorelease]; // release the UUID  CFRelease(uuid); return uuidString;
} @end