小编Dee*_*kur的帖子

我正在尝试显示原始标签栏图像.以下代码在iOS7中运行正常,但是ios 6.0上面的代码崩溃了.以下是代码AppDelegates didFinishLaunchingWithOptions

UITabBar *tb = tabBarControllerProperty.tabBar;
        NSArray *itemsObject = tb.items;
        for(UITabBarItem *tabItem in itemsObject)
        {
            UIImage *imaged = tabItem.image;
            tabItem.selectedImage = imaged;
            tabItem.image = [imaged imageWithRenderingMode:UIImageRenderingModeAlwaysOriginal];// crash for ios6, not in ios 7
        }

我NSURL在ScanViewController课堂上有一个对象并将它传递给ListViewController类.

NSURL *url = [NSURL URLWithString:@"http:// some url"];

我在我的项目中使用xib,但找不到替代品

[self.storyboard instantiateViewControllerWithIdentifier:]

[NSURLConnection sendAsynchronousRequest:request queue:queue completionHandler:^(NSURLResponse *response, NSData *data, NSError *error)
{
    if(error || !data)
    {
        NSLog(@"JSON NOT posted");
    }
    else
    {
        NSLog(@"JSON data posted!");
        id jsonObject = [NSJSONSerialization JSONObjectWithData:data options:NSJSONReadingAllowFragments error:Nil];

        if([jsonObject respondsToSelector:@selector(objectForKey:)])
        {
            NSDictionary *dictionaryForUserID = [jsonObject valueForKey:@"ProjID"];
            NSLog(@" Project Id = %@", dictionaryForUserID);

            NSURL *urlToDisplayInListView = [NSURL URLWithString:[NSString stringWithFormat:@"http://some url/%@", dictionaryForUserID]]; **//Pass this object to other viewcontroller**

        }
    }
}];

将数据发布到json Web服务后,我需要提醒用户数据是否已成功保存.我对此没有任何问题,但在日志中获得"数据已成功保存"响应后,视图需要很长时间(大约40-50秒)才能显示警报视图.我可以在几秒钟内得到响应后立即帮助我获取警报视图吗？这就是我所做的

NSURL *url = [NSURL URLWithString:@"some url"];
        NSMutableURLRequest *request = [[NSMutableURLRequest alloc] initWithURL:url];
        NSData *requestData = [NSJSONSerialization dataWithJSONObject:dictionary options:kNilOptions error:&error];
        [request setHTTPMethod:@"POST"];
        [request setValue:@"application/json" forHTTPHeaderField:@"Accept"];
        [request setValue:@"application/json" forHTTPHeaderField:@"Content-Type"];
        [request setValue:[NSString stringWithFormat:@"%d", [requestData length]] forHTTPHeaderField:@"Content-Length"];
        [request setHTTPBody: requestData];
        NSURLConnection *connection = [[NSURLConnection alloc] initWithRequest:request delegate:self];
        [connection start];
        [NSURLConnection sendAsynchronousRequest:request queue:queue completionHandler:^(NSURLResponse *response, NSData *data, NSError *error){
            if(error || !data)
            {
                NSLog(@"JSON Data not posted!");
                [activity stopAnimating];
                UIAlertView *alertMessage = [[UIAlertView alloc] initWithTitle:@"Error" message:@"Data not saved" delegate:self cancelButtonTitle:@"OK" otherButtonTitles:nil];
                [alertMessage show]; …

我列出了来自Web Service的联系人,并将其显示在联系人的"sectionView"tableView中,如屏幕截图所示.

问题是,对于A部分和S部分,我获得了第一行复选框的相同标记值.我已经对一个数组进行了排序并显示在索引表视图中.如何根据indexPath.row获取不同的标记值,而不管显示的部分数量.这是我尝试过的

    In cellForRowAtIndexPath: 
     UIButton *checkBox;
        if(UI_USER_INTERFACE_IDIOM() == UIUserInterfaceIdiomPhone)
        {
            checkBox = [[UIButton alloc]initWithFrame:CGRectMake(7, 8, 30, 30)];
        }
        else
        {
            checkBox = [[UIButton alloc]initWithFrame:CGRectMake(15, 13, 30, 30)];
        }

        //int cnt = 0;
        // for (int i = indexPath.section - 1; i > 0 ; i--)
        // {
        //     cnt += [[objectsForCharacters objectForKey:[arrayOfCharacters objectAtIndex:i]] count]; //arrayOfCharachters has char 'A' to 'Z'
        // }

        //checkBox.tag = cnt + indexPath.row;

        [checkBox setImage:[UIImage imageNamed:@"checkBox.png"] forState:UIControlStateNormal];
        [checkBox addTarget:self action:@selector(checkBoxClicked:) forControlEvents:UIControlEventTouchUpInside];
        [checkBox setTag:indexPath.row];
        [cell.contentView addSubview:checkBox]; …

我在应用处于测试阶段时使用ad-hoc创建了.ipa文件.我想将此.ipa文件发送给我在其他国家的朋友测试应用程序,但由于公司政策,他无法越狱设备.如何制作可在任何iOS设备上执行的.ipa文件？

从Xcode 4.6生成的.ipa文件

完成此链接后,我的代码问题是输出图像无法设置正确的x和y值,因为裁剪后的图像似乎在结果图像中有0和0,无论我在哪里缩放(或计算滚动偏移的位置) .这是我尝试过的.

- (IBAction)crop:(id)sender
{

    float zoomScale = 1.0f / [self.scroll zoomScale];

    CGRect rect;
    NSLog(@"contentOffset is :%f,%f",[self.scroll contentOffset].x,[self.scroll contentOffset].y);
    rect.origin.x = self.scroll.contentOffset.x * zoomScale;
    rect.origin.y = self.scroll.contentOffset.y * zoomScale;
    rect.size.width = self.scroll.bounds.size.width * zoomScale;
    rect.size.height = self.scroll.bounds.size.height * zoomScale;

    UIGraphicsBeginImageContextWithOptions( CGSizeMake(rect.size.width, rect.size.height),
                                           NO,
                                           0.);

    NSLog(@"rect offset is :%f,%f",rect.origin.x,rect.origin.y);
    CGPoint point = CGPointMake(-rect.origin.x, -rect.origin.y); **//even though above NSLog have some values, but output image is unable to set proper x and y values as cropped image seems to have …

我有一个字符串

  NSString *str = @"[\"a\" : \"b\" , \"c\" : \"d\", \"e\" : \"f\" ,]" ;

我想删除逗号(,),即如果字符串只在字符串的末尾有逗号,则应该替换为像@""这样的空白字符.如果逗号出现在字符串的开头或中间,则不应删除它.所以最后的字符串应该是

 ["a" : "b" , "c" : "d", "e" : "f"] 

代替

 ["a" : "b" , "c" : "d", "e" : "f",]