モバイル開発--iOS開発コードまとめ

CSDNブログチャンネルを見て、「iOSゲームプログラミングの旅」の募集活動がいいですね.主にサイン本が好きですね.だからiOSが開発した小さなコードをまとめて共有します.
1.テスト後に使える画像のアップロードコード

- (IBAction)uploadButton:(id)sender {
    UIImage *image = [UIImage imageNamed:@"1.jpg"]; // 
    NSData *imageData = UIImageJPEGRepresentation(image,0.5);// 
    NSLog(@" :%i",[imageData length]);
    // post url
    NSString *urlString = @"http://192.168.1.113:8090/text/UploadServlet";
    // 
    // 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
--%@\r
",boundary] dataUsingEncoding:NSUTF8StringEncoding]];
    [body appendData:[[NSString stringWithString:@"Content-Disposition:form-data; name=\"userfile\"; filename=\"2.png\"\r
"] dataUsingEncoding:NSUTF8StringEncoding]]; // 
    [body appendData:[[NSString stringWithString:@"Content-Type: application/octet-stream\r
\r
"] dataUsingEncoding:NSUTF8StringEncoding]];
    [body appendData:[NSData dataWithData:imageData]];
    [body appendData:[[NSString stringWithFormat:@"\r
--%@--\r
",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- ：%@",returnString);
}

、画像の圧縮用法:
UIImage *yourImage= [self imageWithImageSimple:image scaledToSize:CGSizeMake(210.0, 210.0)];
//圧縮画像

- (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、imageViewに画像をロードする

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

4、navigationBar非表示の設定方法

self.navigationController.navigationBarHidden = YES;//

5、UIlabelマルチテキスト自動改行(折れ線)

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!";
// 
label.backgroundColor = [UIColor redColor];
// 
label.textColor = [UIColor whiteColor];
// 
label.textAlignment = UITextAlignmentCenter;
// 
label.lineBreakMode = UILineBreakModeWordWrap;
label.numberOfLines = 0;

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