• 1.判斷郵箱格式是否正確的程式碼： //利用正則表示式驗證

      -(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.圖片壓縮

  用法：UIImage *yourImage= [self imageWithImageSimple:image scaledToSize:CGSizeMake(210.0, 210.0)]; //壓縮圖片

      - (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.親測可用的圖片上傳程式碼

      - (IBAction)uploadButton:(id)sender { 
          UIImage *image = [UIImage imageNamed:@"1.jpg"]; //圖片名 
          NSData *imageData = UIImageJPEGRepresentation(image,0.5);//壓縮比例 
          NSLog(@"位元組數:%i",[imageData length]); 
          // post url 
          NSString *urlString = @"http://192.168.1.113:8090/text/UploadServlet"; 
          //伺服器地址 
          // 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]]; //上傳上去的圖片名字 
          [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-測試輸出：%@",returnString); 
      } 
   
  

  
  
• 4.對相簿的操作

          選擇相簿

    UIImagePickerControllerSourceType sourceType = UIImagePickerControllerSourceTypeCamera; 
       if (![UIImagePickerControllerisSourceTypeAvailable:UIImagePickerControllerSourceTypeCamera]) { 
           sourceType=UIImagePickerControllerSourceTypePhotoLibrary; 
       } 
    UIImagePickerController * picker = [[UIImagePickerControlleralloc]init]; 
    picker.delegate = self; 
    picker.allowsEditing=YES; 
    picker.sourceType=sourceType; 
    [self presentModalViewController:picker animated:YES]; 

    -(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]; 
    } 

    -(void)imagePickerControllerDIdCancel:(UIImagePickerController*)picker 
    { 
        [picker dismissModalViewControllerAnimated:YES]; 
    } 

• 5 .跳到下個View

      nextWebView = [[WEBViewController alloc] initWithNibName:@"WEBViewController" bundle:nil]; 
      [self presentModalViewController:nextWebView animated:YES]; 

  
  
• 6. 建立一個UIBarButton右邊按鈕        

      UIBarButtonItem *rightButton = [[UIBarButtonItem alloc] initWithTitle:@"右邊" style:UIBarButtonItemStyleDone target:self action:@selector(clickRightButton)]; 
      [self.navigationItem setRightBarButtonItem:rightButton];  

  
  
• 7.給imageView載入圖片

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

  
  
• 8.設定navigationBar隱藏

      self.navigationController.navigationBarHidden = YES;// 

  
  
• 9.隱藏statusBar：在程式的viewDidLoad中加入

  [[UIApplication sharedApplication]setStatusBarHidden:YES animated:NO]; 

• 10鍵盤透明：

  textField.keyboardAppearance = UIKeyboardAppearanceAlert; 

  
  
• 11.狀態列的網路活動風火輪是否旋轉：

      [UIApplication sharedApplication].networkActivityIndicatorVisible = YES ; //預設值是NO。 

  
  
• 12.擷取螢幕圖片：

      //建立一個基於點陣圖的圖形上下文並指定大小為CGSizeMake(200,400) 
      UIGraphicsBeginImageContext(CGSizeMake(200,400));  
      //renderInContext 呈現接受者及其子範圍到指定的上下文 
      [self.view.layer renderInContext:UIGraphicsGetCurrentContext()]; 
          //返回一個基於當前圖形上下文的圖片 
       UIImage *aImage = UIGraphicsGetImageFromCurrentImageContext(); 
        //移除棧頂的基於當前點陣圖的圖形上下文 
      UIGraphicsEndImageContext(); 
      //以png格式返回指定圖片的資料 
      imageData = UIImagePNGRepresentation(aImage); 

  
  
• 13.更改cell選中的背景：

      UIView *myview = [[UIView alloc] init]; 
      myview.frame = CGRectMake(0, 0, 320, 47); 
      myview.backgroundColor = [UIColorcolorWithPatternImage:[UIImage imageNamed:@"0006.png"]]; 
      cell.selectedBackgroundView = myview;