iOS开发上传图片-----流媒体格式

在做上传图片开发的时候,后台说图片格式为流媒体格式,由于本人不是很懂后台所以一直没懂流媒体是格式,安卓也是做出来说不出来.经过资料查阅和整理,弄出了这么个类,有待完善的地方还望大家多多提出建议

在.h文件中

#import <UIKit/UIKit.h>

@interface RequestPostUploadViewController : UIViewController

+ (NSString *)postRequestWithURL: (NSString *)url  // IN
postParems: (NSMutableDictionary *)postParems // IN
picFilePath: (NSString *)picFilePath  // IN
picFileName: (NSString *)picFileName  // IN
FORM_FLE_INPUT:(NSString *)FORM_FLE_INPUT;

+ (UIImage *) imageWithImageSimple:(UIImage*)image scaledToSize:(CGSize) newSize;

+ (NSString *)saveImage:(UIImage *)tempImage WithName:(NSString *)imageName;

+ (NSString *)generateUuidString;
@end

在.m文件中

#import "RequestPostUploadViewController.h"

@interface RequestPostUploadViewController ()

@end

@implementation RequestPostUploadViewController

- (void)viewDidLoad {
[super viewDidLoad];
// Do any additional setup after loading the view.
}

+ (NSString *)postRequestWithURL: (NSString *)url  // IN
postParems: (NSMutableDictionary *)postParems // IN
picFilePath: (NSString *)picFilePath  // IN
picFileName: (NSString *)picFileName // IN
FORM_FLE_INPUT:(NSString *)FORM_FLE_INPUT
{

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]];

RMLog(@"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:@"%lu", (unsigned long)[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){
RMLog(@"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:@"/"];
RMLog(@"===fullPathToFile===%@",fullPathToFile);
RMLog(@"===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 *)CFBridgingRelease(CFUUIDCreateString(kCFAllocatorDefault, uuid));

// transfer ownership of the string
// to the autorelease pool
//    [uuidString autorelease];

// release the UUID
//    CFRelease(uuid);

return uuidString;
}

在实现文件的头处添加此命名(命名比较关键)

NSString *kTMP_UPLOAD_IMG_PATH=@"";

在实现文件中调用方法

NSData *imageData = UIImagePNGRepresentation(tempImage);
NSArray *paths = NSSearchPathForDirectoriesInDomains(NSDocumentDirectory, NSUserDomainMask, YES);
NSString *documentsDirectory = [paths objectAtIndex:0];
NSString *fullPathToFile = [documentsDirectory stringByAppendingPathComponent:imageName];

kTMP_UPLOAD_IMG_PATH = fullPathToFile;
[imageData writeToFile:fullPathToFile atomically:NO];

#pragma mark -
NSString *URLString = [RMUtils requestURL:@"upload"];
NSDictionary *dictionData=[RMUtils userBaseMessage];
if ([[RMNetWork shareInstance] rechability]) {
if ([kTMP_UPLOAD_IMG_PATH isEqualToString:@""]) {
_httpString = [RequestPostUploadViewController postRequestWithURL:URLString postParems:[@{@"uid":dictionData[@"uid"],@"sign":dictionData[@"sign"]}mutableCopy] picFilePath:nil picFileName:nil FORM_FLE_INPUT:@"images_files"];
}else{
NSArray *nameArray = [kTMP_UPLOAD_IMG_PATH componentsSeparatedByString:@"/"];
_httpString = [RequestPostUploadViewController postRequestWithURL:URLString postParems:[@{@"uid":dictionData[@"uid"],@"sign":dictionData[@"sign"]}mutableCopy] picFilePath:kTMP_UPLOAD_IMG_PATH picFileName:[nameArray objectAtIndex:[nameArray count]-1] FORM_FLE_INPUT:@"images_files"];
}
if (_httpString == nil) {
[RMUtils showMessage:@"图片上传失败,请稍候再添加"];
return;
}
NSDictionary *bigDic = [RMUtils parseJSONStringToNSDictionary:[NSString ridObject:_httpString]];
NSDictionary *dataDic = bigDic[@"data"];
NSDictionary *imagesDic = dataDic[@"images_files"];
NSString *files_id = imagesDic[@"files_id"];
_files_id = files_id;
}else{
// 菊花加载
}

}

由于这个是去年的时候弄的了,忘记都参阅了哪些资料,今天无意中想到了,列出来供大家参阅.
写法和用法都比较繁琐,有更好方法的还望指教啊!!!!!!!!