[iOS]使用非同步方式透過NSURLConnection上傳檔案-以圖片檔案為例

如果要使用非同步的方式來上傳檔案的話，則需要設定NSURLConnectionDelegate來接收回傳值並且宣告一個NSMutableData來接收。


SampleViewController.h

---

@interface SampleViewController : UIViewController <NSURLConnectionDelegate> {

    NSMutableData *receivedData;//NSURLConnectionDelegate使用

}

@property (nonatomic, strong) NSMutableData *receivedData;

@end

---

與同步的做法，差別在於這邊使用

[NSURLConnection connectionWithRequest:request delegate:self];

來傳遞，透過delegate 來接收回傳的event

SampleViewController.m

---

@implementation MemberViewController
@synthesize receivedData;

- (void)uploadFileDelegate:(NSString *)url fileData:(NSData *)paramData filePath:(NSString *)path{
    self.receivedData=[[NSMutableData alloc] init];

    

    NSMutableURLRequest *request = [[NSMutableURLRequest alloc] init];

    [request setCachePolicy:NSURLRequestReloadIgnoringLocalCacheData];

    [request setTimeoutInterval:30];

    [request setHTTPMethod:@"POST"];

    

    NSString *boundary = @"0xKhTmLbOuNdArY";//NSURLConnection is very sensitive to format.

    // set Content-Type in HTTP header

    NSString *contentType = [NSString stringWithFormat:@"multipart/form-data; boundary=%@", boundary];
    [request setValue:contentType forHTTPHeaderField: @"Content-Type"];

    

    // post body

    NSMutableData *body = [NSMutableData data];

    

    // add params (all params are strings)

    [body appendData:[[NSString stringWithFormat:@"--%@\r\n", boundary] dataUsingEncoding:NSUTF8StringEncoding]];

    [body appendData:[[NSString stringWithFormat:@"Content-Disposition: form-data; name=\"%@\"\r\n\r\n", @"path"] dataUsingEncoding:NSUTF8StringEncoding]];

    [body appendData:[[NSString stringWithFormat:@"%@\r\n",path] dataUsingEncoding:NSUTF8StringEncoding]];

    

    // add image data   

    [body appendData:[[NSString stringWithFormat:@"--%@\r\n", boundary] dataUsingEncoding:NSUTF8StringEncoding]];

    [body appendData:[[NSString stringWithFormat:@"Content-Disposition: form-data; name=\"%@\"; filename=\"image.jpg\"\r\n", @"file"] dataUsingEncoding:NSUTF8StringEncoding]];

    [body appendData:[[NSString stringWithFormat:@"Content-Type: image/jpeg\r\n\r\n"] dataUsingEncoding:NSUTF8StringEncoding]];

    [body appendData:paramData];

    [body appendData:[[NSString stringWithFormat:@"\r\n"] dataUsingEncoding:NSUTF8StringEncoding]];

    

    [body appendData:[[NSString stringWithFormat:@"--%@--\r\n", boundary] dataUsingEncoding:NSUTF8StringEncoding]];

    // setting the body of the post to the reqeust

    [request setHTTPBody:body];

    // set the content-length

    NSString *postLength = [NSString stringWithFormat:@"%d", [body length]];
    [request setValue:postLength forHTTPHeaderField:@"Content-Length"];

    

    // set URL

    [request setURL:[NSURL URLWithString:url]];

    

    [NSURLConnection connectionWithRequest:request delegate:self];

    //進入NSURLConnection Delegate

}

#pragma mark -

#pragma mark NSURLConnection Delegate

- (void)connection:(NSURLConnection *)connection didReceiveResponse:(NSURLResponse *)response {

    // store data

    NSLog(@"didReceiveResponse");

    [self.receivedData setLength:0];      //通常在這裡會先清空回傳值的暫存

}
- (void)connection:(NSURLConnection *)connection didReceiveData:(NSData *)data {

    NSLog(@"didReceiveData");

    [self.receivedData appendData:data];    //可能多次收到多次回傳值，把新的回傳值加在原有回傳值後面

}
- (void)connection:(NSURLConnection *)connection didFailWithError:(NSError *)error {

    // 錯誤例外處理

    NSLog(@"didFailWithError");

}

- (void)connectionDidFinishLoading:(NSURLConnection *)connection {

    // disconnect

    NSString *checkData=[NSString stringWithFormat:@"%@",[[NSString alloc] initWithData:self.receivedData encoding:NSUTF8StringEncoding]];

}

[PHP]透過php_curl.dll來呼叫Web Service 互傳資料

用來與server溝通 傳遞參數: {name:123,password:123}

$toURL,   
  CURLOPT_HEADER=>0,   
  CURLOPT_VERBOSE=>0,   
  CURLOPT_RETURNTRANSFER=>true,   
  CURLOPT_USERAGENT=>"Mozilla/4.0 (compatible;)",   
  CURLOPT_POST=>true,   
  CURLOPT_POSTFIELDS=>http_build_query($post), 
  ); 
 curl_setopt_array($ch, $options); 
 // CURLOPT_RETURNTRANSFER=true 會傳回網頁回應, 
 // false 時只回傳成功與否 
 $result = curl_exec($ch);  
 curl_close($ch); 
 return $result; 
}
//接收POST參數的URL 
$url = '你要連結的url';
$postdata = array('Name'=>'123','password'=>'123');//要上傳的data 
$getData = my_curl($url,$postdata);
echo $getData."

";//回傳資料 
?>

[IOS]使用同步方式透過NSURLConnection上傳檔案-以圖片檔案為例

使用同步的方式上傳圖片檔

呼叫：

---

//上傳的url,上傳的image data 一個檔案file:image.jpg 一個參數path:path

NSString *result=[self uploadFile:url fileData:data filePath:path];

函式：

---

- (NSString *)uploadFile:(NSString *)url fileData:(NSData *)paramData filePath:(NSString *)path{

    NSMutableURLRequest *request = [[NSMutableURLRequest alloc] init];

    [request setCachePolicy:NSURLRequestReloadIgnoringLocalCacheData];

    [request setTimeoutInterval:30];

    [request setHTTPMethod:@"POST"];

    

    NSString *boundary = @"0xKhTmLbOuNdArY";//NSURLConnection is very sensitive to format.

    // set Content-Type in HTTP header

    NSString *contentType = [NSString stringWithFormat:@"multipart/form-data; boundary=%@", boundary];

    [request setValue:contentType forHTTPHeaderField: @"Content-Type"];

    

    // post body

    NSMutableData *body = [NSMutableData data];

    

    // add params (all params are strings)

    [body appendData:[[NSString stringWithFormat:@"--%@\r\n", boundary] dataUsingEncoding:NSUTF8StringEncoding]];

    [body appendData:[[NSString stringWithFormat:@"Content-Disposition: form-data; name=\"%@\"\r\n\r\n", @"path"] dataUsingEncoding:NSUTF8StringEncoding]];

    [body appendData:[[NSString stringWithFormat:@"%@\r\n",path] dataUsingEncoding:NSUTF8StringEncoding]];

    

    // add image data

    

    [body appendData:[[NSString stringWithFormat:@"--%@\r\n", boundary] dataUsingEncoding:NSUTF8StringEncoding]];

    [body appendData:[[NSString stringWithFormat:@"Content-Disposition: form-data; name=\"%@\"; filename=\"image.jpg\"\r\n", @"file"] dataUsingEncoding:NSUTF8StringEncoding]];

    [body appendData:[[NSString stringWithFormat:@"Content-Type: image/jpeg\r\n\r\n"] dataUsingEncoding:NSUTF8StringEncoding]];

    [body appendData:paramData];

    [body appendData:[[NSString stringWithFormat:@"\r\n"] dataUsingEncoding:NSUTF8StringEncoding]];

    

    [body appendData:[[NSString stringWithFormat:@"--%@--\r\n", boundary] dataUsingEncoding:NSUTF8StringEncoding]];

    // setting the body of the post to the reqeust

    [request setHTTPBody:body];

    // set the content-length

    NSString *postLength = [NSString stringWithFormat:@"%d", [body length]];

    [request setValue:postLength forHTTPHeaderField:@"Content-Length"];

    

    // set URL

    [request setURL:[NSURL URLWithString:url]];

    

    NSData *returnData=[NSURLConnection sendSynchronousRequest:request returningResponse:nil error:nil];

    //看returnData出來的值

    NSLog(@"%@",[[NSString alloc] initWithData:returnData encoding:NSUTF8StringEncoding]);

    NSString *checkData=[NSString stringWithFormat:@"%@",[[NSString alloc] 

    return checkData;  

}

[iOS]將相片的圖片轉正顯示

如果顯示UIImage時，發現圖片反了，或者是需要轉90度，使用這個函式會自動幫你轉正顯示

呼叫：

---

UIImage* image =[self rotateImage:image];

函式：

---

- (UIImage *)rotateImage:(UIImage *)aImage {

    CGImageRef imgRef = aImage.CGImage;

    CGFloat width = CGImageGetWidth(imgRef);

    CGFloat height = CGImageGetHeight(imgRef);

    CGAffineTransform transform = CGAffineTransformIdentity;

    CGRect bounds = CGRectMake(0, 0, width, height);

    CGFloat scaleRatio = 1;

    CGFloat boundHeight;

    UIImageOrientation orient = aImage.imageOrientation;

    switch(orient) {

        case UIImageOrientationUp: //EXIF = 1

            transform = CGAffineTransformIdentity;

            break;

        case UIImageOrientationUpMirrored: //EXIF = 2

            transform = CGAffineTransformMakeTranslation(width, 0.0);

            transform = CGAffineTransformScale(transform, -1.0, 1.0);

            break;

        case UIImageOrientationDown: //EXIF = 3

            transform = CGAffineTransformMakeTranslation(width, height);

            transform = CGAffineTransformRotate(transform, M_PI);

            break;

        case UIImageOrientationDownMirrored: //EXIF = 4

            transform = CGAffineTransformMakeTranslation(0.0, height);

            transform = CGAffineTransformScale(transform, 1.0, -1.0);

            break;

        case UIImageOrientationLeftMirrored: //EXIF = 5

            boundHeight = bounds.size.height;

            bounds.size.height = bounds.size.width;

            bounds.size.width = boundHeight;

            transform = CGAffineTransformMakeTranslation(height, width);

            transform = CGAffineTransformScale(transform, -1.0, 1.0);

            transform = CGAffineTransformRotate(transform, 3.0 * M_PI / 2.0);

            break;

        case UIImageOrientationLeft: //EXIF = 6

            boundHeight = bounds.size.height;

            bounds.size.height = bounds.size.width;

            bounds.size.width = boundHeight;

            transform = CGAffineTransformMakeTranslation(0.0, width);

            transform = CGAffineTransformRotate(transform, 3.0 * M_PI / 2.0);

            break;

        case UIImageOrientationRightMirrored: //EXIF = 7

            boundHeight = bounds.size.height;

            bounds.size.height = bounds.size.width;

            bounds.size.width = boundHeight;

            transform = CGAffineTransformMakeScale(-1.0, 1.0);

            transform = CGAffineTransformRotate(transform, M_PI / 2.0);

            break;

        case UIImageOrientationRight: //EXIF = 8

            boundHeight = bounds.size.height;

            bounds.size.height = bounds.size.width;

            bounds.size.width = boundHeight;

            transform = CGAffineTransformMakeTranslation(height, 0.0);

            transform = CGAffineTransformRotate(transform, M_PI / 2.0);

            break;

        default:

            [NSException raise:NSInternalInconsistencyException format:@"Invalid image orientation"];

    }

    UIGraphicsBeginImageContext(bounds.size);

    CGContextRef context = UIGraphicsGetCurrentContext();

    if (orient == UIImageOrientationRight || orient == UIImageOrientationLeft) {

        CGContextScaleCTM(context, -scaleRatio, scaleRatio);

        CGContextTranslateCTM(context, -height, 0);

    } else {

        CGContextScaleCTM(context, scaleRatio, -scaleRatio);

        CGContextTranslateCTM(context, 0, -height);

    }

    CGContextConcatCTM(context, transform);

    CGContextDrawImage(UIGraphicsGetCurrentContext(), CGRectMake(0, 0, width, height), imgRef);

    UIImage *imageCopy = UIGraphicsGetImageFromCurrentImageContext();

    UIGraphicsEndImageContext();

    return imageCopy;

}

[iOS]將UIimage的圖片縮小

調整UIImage Size，方便縮圖使用。

呼叫：

---

UIImage* image =[self imageWithImageSimple:image scaledToSize:CGSizeMake(512.0, 512.0)];//縮小至512X512

函式：

---

//照片縮小 image,最大寬高

- (UIImage*)imageWithImageSimple:(UIImage*)image scaledToSize:(CGSize)newSize

{   

    float width,height;

    if (image.size.width<newSize.width && image.size.height<newSize.height){

        //如果已經小於newSize則不縮小

        width=image.size.width;

        height=image.size.height;

    }else if (image.size.height >= (newSize.height/newSize.width)*image.size.width){

        width=image.size.width/image.size.height*newSize.height;

        height=newSize.height;

    }else{

        height=image.size.height/image.size.width*newSize.height;

        width=newSize.width;

    }

    newSize.width=width;

    newSize.height=height;

    // Create a graphics image context

    UIGraphicsBeginImageContext(newSize);

    // Tell the old image to draw in this new context, with the desired

    // new size

    [image drawInRect:CGRectMake(0,0,newSize.width,newSize.height)];

    // Get the new image from the context

    UIImage* newImage = UIGraphicsGetImageFromCurrentImageContext();

    // End the context

    UIGraphicsEndImageContext();

    // Return the new image.

    return newImage;

}