1. Determine the correct format of the Mailbox code://Use Regular expression validation-(BOOL) Isvalidateemail: (nsstring *) Email{ nsstring *emailregex = @ "[a-z0-9a-z._%+-][email protected][a-za-z0-9.-]+\\. [A-za-z] {2,4} "; nspredicate *emailtest = [nspredicate predicatewithformat:@" Self matches%@ ", EmailRegex]; return [emailtest evaluatewithobject:email];} 2. Image compression Usage: UIImage *yourimage= [self imagewithimagesimple:image scaledtosize:cgsizemake (210.0, 210.0)];// Compress picture-(uiimage*) Imagewithimagesimple: (uiimage*) Image scaledtosize: (cgsize) newsize{//Create a graphics image Contextuigraphicsbeginimagecontext (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 contextuiimage* newimage = uigraphicsgetimagefromcurrentimagecontext (); //End Contextuigraphicsendimagecontext (); //Return the new Image.return newimage;} 3. ProTest available image upload code-(ibaction) Uploadbutton: (ID) Sender {uiimage *image = [uiimage imagenamed:@ "1.jpg"]; Picture name Nsdata *imagedata = uiimagejpegrepresentation (image,0.5);//Compression ratio nslog (@ "bytes:%i", [imageData length]) ;//Post urlnsstring *urlstring = @ "Http://192.168.1.113:8090/text/UploadServlet";//server address//setting up the Request Object nownsmutableurlrequest *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]]; Uploaded image name [body appenddata:[[nsstring stringwithstring:@] content-type:application/octet-stream\r\n\ 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); 4. Load Picture ImageView = [Uiimage *myimagee imagenamed:@ "1.jpg"]; [imageview setimage:myimage]; [self.view Addsubview:imageview]; 5. Working with the Gallery Select album: uiimagepickercontrollersourcetypesourcetype= uiimagepickercontrollersourcetypecamera; if (![ Uiimagepickercontrollerissourcetypeavailable:uiimagepickercontrollersourcetypecamera]) { sourcetype=uiimagepickercontrollersourcetypephotolibrary; } Uiimagepickercontroller * Picker = [[uiimagepickercontrolleralloc]init]; Picker.delegate = self; picker.allowsediting=yes; picker.sourcetype=sourcetype; [self Presentmodalviewcontroller:picker Animated:yes]; Selection complete: -(void) Imagepickercontroller: ( uiimagepickercontroller*) Pickerdidfinishpickingmediawithinfo: (nsdictionary *) info{ [picker dismissmodalviewcontrolleranimated:yes]; UIImage * Image=[info Objectforkey: uiimagepickercontrollereditedimage]; [Self Performselector: @selector (selectpic:) withobject:imageafterdelay:0.1];} -(void) Selectpic: (uiimage*) image{ NSLog (@ "image%@", image); ImageView = [[ Uiimageview alloc] initwithimage:image]; imageview.frame = CGRectMake (0, 0, Image.size.width, Image.size.height); [self.viewaddsubview:imageview]; [Self Performselectorinbackground: @selector (Detect:) Withobject:nil] ;} Detect for the method you define, edit the effect you want to achieve after selecting the photo deselect: -(void) Imagepickercontrollerdidcancel: (uiimagepickercontroller*) Picker
{[Picker dismissmodalviewcontrolleranimated:yes];} 6. Skip to the next Viewnextwebview = [[Webviewcontroller alloc] initwithnibname:@ "Webviewcontroller" bundle:nil]; [Self Presentmodalviewcontroller:nextwebview animated:yes];
7. Create a Uibarbutton right button Uibarbuttonitem *rightbutton = [[uibarbuttonitem alloc] initwithtitle:@ "Right" style:uibarbuttonitemstyledone target:self action: @selector ( Clickrightbutton)]; [Self.navigationitem setrightbarbuttonitem:rightbutton]; 8. Set Navigationbar hidden Self.navigationcontroller.navigationbarhidden = yes;// 9.uilabel multiline text wrap (Automatic folding line) UIView *footerview = [[UIView alloc]initwithframe:cgrectmake (10, 100, 300, 180)]; UILabel *label = [[UILabel alloc]initwithframe:cgrectmake]];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! "; /Background color is red Label.backgroundcolor = [uicolor redcolor];//set font color to white label.textcolor = [Uicolor whitecolor];// Text centered display label.textalignment = uitextalignmentcenter;//auto-wrap settings label.linebreakmode = uilinebreakmodewordwrap; Label.numberoflines = 0; 10. Code Generation Buttoncgrect frame = cgrectmake (0, 400, 72.0, 37.0); Uibutton *button = [uibutton buttonwithtype:uibuttontyperoundedrect];button.frame = frame; [button settitle:@ "Newly added button" forstate: uicontrolstatenormal];button.backgroundcolor = [ uicolor clearcolor];button.tag = 2000; [Button addtarget:self action: @selector (buttonclicked:) forcontrolevents: UIControlEventTouchUpInside]; [Self.view addsubview:button]; 11. Let a control appear in the center of the View: (a control, such as Label,view) label.center = self.view.center; 12. Customizing text various effects: Cell.backgroundcolor = [Uicolorscrollviewtexturedbackgroundcolor];
Set font for text
Cell.textLabel.font = [Uifont fontwithname:@ "Americantypewriter" size:100.0f];
Set the color of text
Cell.textLabel.textColor = [Uicolor Orangecolor];
Set the background color of text
Cell.textLabel.shadowColor = [Uicolor Whitecolor];
Set where text is displayed
Cell.textLabel.textAlignment = Uitextalignmentcenter; 13. Hide StatusBar:
Add in the Viewdidload of the program
[[UIApplication Sharedapplication]setstatusbarhidden:yes Animated:no]; 14. Change the Alertview background:
Uialertview *thealert = [[[Uialertviewalloc] initwithtitle:@ "Atention"
Message: @ "I ' m a chinese!"
Delegate:nil
cancelbuttontitle:@ "Cancel"
otherbuttontitles:@ "Okay", Nil] autorelease];
[Thealert show];
UIImage *theimage = [uiimageimagenamed:@ "Lovechina.png"];
Theimage = [Theimage stretchableimagewithleftcapwidth:0topcapheight:0];
Cgsize thesize = [Thealert frame].size;
Uigraphicsbeginimagecontext (thesize);
[Theimage Drawinrect:cgrectmake (5, 5, thesize.width-10, thesize.height-20)];//the size of this place to adjust itself to fit the size of the alertview background color.
Theimage = Uigraphicsgetimagefromcurrentimagecontext ();
Uigraphicsendimagecontext ();
TheAlert.layer.contents = (ID) [Theimage cgimage];
15. Keyboard Transparency:
Textfield.keyboardappearance = Uikeyboardappearancealert;
16. The network activity of the status bar whether the steamer rotates:
[UIApplication sharedapplication].networkactivityindicatorvisible, the default value is No. 17. Capture the screen image:
Creates a bitmap-based graphics context and specifies a size of Cgsizemake (200,400)
Uigraphicsbeginimagecontext (Cgsizemake (200,400));
Renderincontext renders the recipient and its child scopes to the specified context
[Self.view.layer Renderincontext:uigraphicsgetcurrentcontext ()];
Returns a picture based on the current drawing context
UIImage *aimage = Uigraphicsgetimagefromcurrentimagecontext ();
Removes the top of the stack based on the current bitmap's graphics context
Uigraphicsendimagecontext ();
Returns the data for the specified picture in PNG format
ImageData = Uiimagepngrepresentation (aimage); 18. Change the background of cell selection:
UIView *myview = [[UIView alloc] init];
Myview.frame = CGRectMake (0, 0, 320, 47);
Myview.backgroundcolor = [Uicolorcolorwithpatternimage:[uiimage imagenamed:@ "0006.png"];
Cell.selectedbackgroundview = myview;:19. Show Picture:
CGRect myimagerect = CGRectMake (0.0f, 0.0f, 320.0f, 109.0f);
Uiimageview *myimage = [[Uiimageview alloc] initwithframe:myimagerect];
[MyImage setimage:[uiimage imagenamed:@ "Myimage.png"];
Myimage.opaque = YES; Opaque is transparent
[Self.view Addsubview:myimage]; 20. Can make the picture fit box Size (Beta) nsstring*imagepath = [[NSBundle mainbundle] pathforresource:@ "Xcodecrash" oftype:@ "PNG"];
UIImage *image = [[UIImage Alloc]initwithcontentsoffile:imagepath];
UIImage *newimage= [Image transformwidth:80.f HEIGHT:240.F];
Uiimageview *imageview = [[Uiimageview alloc]initwithimage:newimage];
[Newimagerelease];
[Image release];
[Self.view Addsubview:imageview]; 21. Implement the code to jump by clicking on the image: (Generate a button with a background image to bind the button to the desired event) UIButton *imgbutton=[[uibutton Alloc]initwithframe:cgrectmake (0, 0, 120, 120)]; [Imgbutton setbackgroundimage: (UIImage *) [Self.imgarray ObjectAtIndex:indexPath.row] Forstate:uicontrolstatenormal];imgbutton.tag=[indexpath row]; [Imgbutton addtarget:self Action: @selector (ButtonClick:) forcontrolevents:uicontroleventtouchupinside]; 22. Keyboard recovery:-(ibaction) textfielddoneediting: (ID) sender{[sender Resighfirstrespond];} Recycle the keyboard by clicking on the background: (two must be added)-(ibaction) textfielddoneediting: (ID) sender{[sender resighfirstrespond];}- (ibaction) backgroundtapped: (ID) Sender{[namefield resignfirstrespond];[ Numberfield Resignfirstrespond];}
