Mobile development-Summary of iOS development code

We can see that the csdn blog channel has a great essay activity on "iOS game programming Journey", mainly because it prefers signature books. So I will summarize the small code developed by IOS and share it with you.

1. Image Upload code that can be used after testing

-(Ibaction) uploadbutton :( ID) sender {uiimage * image = [uiimage imagenamed: @ "1.jpg"]; // image name nsdata * imagedata = uiimagejpegrepresentation (image, 0.5 ); // compression ratio nslog (@ "Bytes: % I", [imagedata length]); // Post URL nsstring * urlstring = @ "http: // 192.168.1.113: 8090/text/uploadservlet "; // server address // setting up the request object now nsmutableurlrequest * request = [[nsmutableurlrequest alloc] init]; [Request seturl: [nsurl urlwithstring: urlstring]; [Request sethttpmethod: @ "Post"]; // nsstring * boundary = [nsstring stringwithstring: @ "----------------------- 14737809831466499882746641449"]; nsstring * contenttype = [nsstring stringwithformat: @ "multipart/form-data; boundary = % @", boundary]; [Request addvalue: contenttype forhttpheaderfield: @ "Content-Type"]; // nsmutabledata * Body = [nsmutabledata data]; [Body appenddata: [[nsstring stringwithformat: @ "\ r \ n -- % @ \ r \ n", boundary] datausingencoding: nsutf8stringencoding]; [Body appenddata: [[nsstring stringwithstring: @ "content-Disposition: Form-data; name = \" userfile \"; filename = \ "2.png \" \ r \ n "] datausingencoding: nsutf8stringencoding]; // The Name Of The uploaded image [Body appenddata: [[nsstring stringwithstring: @ "Content-Type: Application/octet-stream \ r \ n"] datausingencoding: nsutf8stringencoding]; [Body appenddata: [nsdata datawithdata: imagedata]; [Body appenddata: [[nsstring stringwithformat: @ "\ r \ n -- % @ -- \ r \ n", boundary] datausingencoding: nsutf8stringencoding]; [Request sethttpbody: body]; // nslog (@ "1-body: % @", body); nslog (@ "2-Request: % @", request); nsdata * returndata = [nsurlconnection sendsynchronousrequest: request returningresponse: Nil error: Nil]; nsstring * returnstring = [[nsstring alloc] initwithdata: returndata encoding: nsutf8stringencoding]; nslog (@ "3-Test output: % @", returnstring );}

2. Image Compression usage: uiimage * yourimage = [self imagewithimagesimple: Image scaledtosize: cgsizemake (210.0, 210.0)];

// Compress the image

- (UIImage*)imageWithImageSimple:(UIImage*)image scaledToSize:(CGSize)newSize{    // Create a graphics image context    UIGraphicsBeginImageContext(newSize);        // Tell the old image to draw in this newcontext, 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;}

3. Attach images to imageview

UIImage *myImage = [UIImage imageNamed:@"1.jpg"];[imageView setImage:myImage];[self.view addSubview:imageView];

4. How to Set navigationbar to hide

self.navigationController.navigationBarHidden = YES;//

5. uilabel multi-Line Text wrap (line breaks)

Uiview * footerview = [[uiview alloc] initwithframe: cgrectmake (10,100,300,180)]; uilabel * label = [[uilabel alloc] initwithframe: cgrectmake (10,100,300,150)]; label. TEXT = @ "Hello world! Hello world! Hello world! Hello world! Hello world! Hello world! Hello world! Hello world! Hello world! Hello world! Hello world! Hello world! Hello world! Helloworld! "; // The background color is red label. backgroundcolor = [uicolor redcolor]; // set the font color to a white label. textcolor = [uicolor whitecolor]; // text center label. textalignment = uitextalignmentcenter; // you can specify a label for automatic line insertion. linebreakmode = uilinebreakmodewordwrap; label. numberoflines = 0;

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