標籤：des style code c tar ext
1.判斷郵箱格式是否正確的代碼：//利用Regex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 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 the contextUIGraphicsEndImageContext(); // Return the new image.return newImage;} 3.親測可用的圖片上傳代碼- (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 urlNSString *urlString = @"http://192.168.1.113:8090/text/UploadServlet";//伺服器位址// 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]]; //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.給imageView載入圖片UIImage *myImage = [UIImage imageNamed:@"1.jpg"]; [imageView setImage:myImage]; [self.view addSubview:imageView]; 5.對圖庫的操作選擇相簿：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];選擇完畢： -(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為自己定義的方法，編輯選取照片後要實現的效果取消選擇： -(void)imagePickerControllerDIdCancel:(UIImagePickerController*)picker
{ [picker dismissModalViewControllerAnimated:YES];} 6.跳到下個ViewnextWebView = [[WEBViewController alloc] initWithNibName:@"WEBViewController" bundle:nil];[self presentModalViewController:nextWebView animated:YES];
7.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]; 8.設定navigationBar隱藏self.navigationController.navigationBarHidden = YES;// 9.UIlabel多行文字自動換行 （自動折行）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!";//背景顏色為紅色label.backgroundColor = [UIColor redColor];//設定字型顏色為白色label.textColor = [UIColor whiteColor];//文字置中顯示label.textAlignment = UITextAlignmentCenter;//自動折行設定label.lineBreakMode = UILineBreakModeWordWrap;label.numberOfLines = 0; 10.代碼產生ButtonCGRect frame = CGRectMake(0, 400, 72.0, 37.0);UIButton *button = [UIButton buttonWithType:UIButtonTypeRoundedRect];button.frame = frame;[button setTitle:@"新添加的按鈕" forState: UIControlStateNormal];button.backgroundColor = [UIColor clearColor];button.tag = 2000;[button addTarget:self action:@selector(buttonClicked:) forControlEvents:UIControlEventTouchUpInside];[self.view addSubview:button]; 11.讓某個控制項在View的中心位置顯示：（某個控制項，比如label，View）label.center = self.view.center； 12.自訂text各種效果：cell.backgroundColor = [UIColorscrollViewTexturedBackgroundColor];
//設定文字的字型
cell.textLabel.font = [UIFont fontWithName:@"AmericanTypewriter" size:100.0f];
//設定文字的顏色
cell.textLabel.textColor = [UIColor orangeColor];
//設定文字的背景顏色
cell.textLabel.shadowColor = [UIColor whiteColor];
//設定文字的顯示位置
cell.textLabel.textAlignment = UITextAlignmentCenter; 13.隱藏statusBar：
在程式的viewDidLoad中加入
[[UIApplication sharedApplication]setStatusBarHidden:YES animated:NO]; 14.更改AlertView背景：
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)];//這個地方的大小要自己調整，以適應alertview的背景顏色的大小。
theImage = UIGraphicsGetImageFromCurrentImageContext();
UIGraphicsEndImageContext();
theAlert.layer.contents = (id)[theImage CGImage];
15.鍵盤透明：
textField.keyboardAppearance = UIKeyboardAppearanceAlert;
16.狀態列的網路活動風火輪是否旋轉：
[UIApplication sharedApplication].networkActivityIndicatorVisible，預設值是NO。 17.截取螢幕圖片：
//建立一個基於位元影像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內容相關的圖片
UIImage *aImage = UIGraphicsGetImageFromCurrentImageContext();
//移除棧頂的基於當前位元影像的圖形上下文
UIGraphicsEndImageContext();
//以png格式返回指定圖片的資料
imageData = UIImagePNGRepresentation(aImage); 18.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;:19.顯示圖片：
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是否透明
[self.view addSubview:myImage]; 20.能讓圖片適應框的大小（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.實現點擊圖片進行跳轉的代碼：（產生一個帶有背景圖片的button，給button綁定想要的事件）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.鍵盤迴收：-（IBAction）textFieldDoneEditing：（id）sender{[sender resighFirstRespond]；}通過點擊背景回收鍵盤：（兩個都得添加）-（IBAction）textFieldDoneEditing：（id）sender{[sender resighFirstRespond]；}-（IBAction）backgroundTapped：（id）sender{[nameField resignFirstRespond];[numberField resignFirstRespond];}
