关于图片上传的问题小demo

//

// 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