IOS上传图片方法类

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