IOS上传图片方法类

 
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
原文：http://www.cnblogs.com/skyblue/archive/2013/05/08/3067108.html

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