小编Des*_*ond的帖子

我想从UIImagepicker中选择一个图像,在相机胶卷中有PNG和JPG格式.

我需要将其转换为NSData.不过,我需要知道这是图像UIImageJPEGRepresentation还是UIImagePNGRepresentation,所以我可以将其转换.

UIImage *orginalImage = [info objectForKey:UIImagePickerControllerOriginalImage];    
    [picker dismissViewControllerAnimated:YES completion:nil];
    NSData *orgData = UIImagePNGRepresentation(orginalImage);

我想用CHCSVParser我的核心数据导出到CSV.我知道如何从实体获取所有价值,但我不知道如何写入CSV.

任何人都可以教我如何用CSV写入CHCSVParser？

// Test listing all Infos from the store
NSFetchRequest *fetchRequest = [[NSFetchRequest alloc] init];
NSEntityDescription *entity = [NSEntityDescription 
                               entityForName:@"NoteLog" inManagedObjectContext:context];
[fetchRequest setEntity:entity];

NSArray *fetchedObjects = [context executeFetchRequest:fetchRequest error:&error];
for (NoteLog *noteInfo in fetchedObjects) {

    NSLog(@"Name: %@", noteInfo.city );
    NSLog(@"Name: %@", noteInfo.country);
    NSLog(@"Name: %@", noteInfo.datetime);
    NSLog(@"Name: %@", noteInfo.notelatitude);
    NSLog(@"Name: %@", noteInfo.notelongtitude);
    NSLog(@"Name: %@", noteInfo.state);
    NSLog(@"Name: %@", noteInfo.text);        
}  

我不得不将大文件大小的歌曲从iTunes库转换为较小的8K歌曲文件.

当我执行转换异步时,即使写入doc文件夹未完成,bool也总是返回true.目前我正在使用10秒的延迟再次调用该功能,它在iPhone 5s的临时工作正常,但我想迎合较慢的设备.

请在我的代码上给我一些指针/推荐.

-(void)startUploadSongAnalysis
{
     [self updateProgressYForID3NForUpload:NO];

    if ([self.uploadWorkingAray count]>=1)
    {
        Song *songVar = [self.uploadWorkingAray objectAtIndex:0];//core data var
        NSLog(@"songVar %@",songVar.songName);
        NSLog(@"songVar %@",songVar.songURL);
        NSURL *songU = [NSURL URLWithString:songVar.songURL]; //URL of iTunes Lib
       // self.asset = [AVAsset assetWithURL:songU];
       // NSLog(@"asset %@",self.asset);
        NSError *error;
        NSString *subString = [[songVar.songURL componentsSeparatedByString:@"id="] lastObject];
        NSString *savedPath = [self.documentsDir stringByAppendingPathComponent:[NSString stringWithFormat:@"audio%@.m4a",subString]];//save file name of converted 8kb song
        NSString *subStringPath = [NSString stringWithFormat:@"audio%@.m4a",subString];

        if ([self.fileManager fileExistsAtPath:savedPath] == YES)
            [self.fileManager removeItemAtPath:savedPath error:&error];
        NSLog(@"cacheDir %@",savedPath);

        //export low bitrate song to …

我在图像视图中有5个动画图像,并希望允许用户根据默认ID点击它们并将其推送到另一个视图.我试图添加手势点击,但imageview没有检测到.

任何人都可以给我一些建议吗？

编辑:最后我没有使用它,我设置了一个UIButton.

谢谢 :)

viewDidLoad中

self.defaultID = [[NSMutableArray alloc] initWithObjects:@"7",@"9",@"11",@"27",@"6",nil];
self.defaultImageCaption = [[NSMutableArray alloc] initWithObjects:@"Ver",@"Green",@"Red",@"CF",@"Dwarf",nil];

//default image
imageViewTop.alpha = 1.0;
imageViewBottom.alpha = 0.0;
imageViewBottom = [[UIImageView alloc] initWithFrame:CGRectMake(0,44,320,367)];
imageViewTop = [[UIImageView alloc] initWithFrame:CGRectMake(0,44,320,367)];

singleDefaultTap = [[UITapGestureRecognizer alloc]initWithTarget:self action:@selector(handleDefaultTap:)];
singleDefaultTap.numberOfTouchesRequired = 1;
imageViewTop.userInteractionEnabled = YES;
[imageViewTop addGestureRecognizer:singleDefaultTap];
imageViewTop.tag = 2000;

UIView *topView = [[UIView alloc] initWithFrame:CGRectMake(0,44,320,367)];
[topView addSubview:imageViewTop];
[self.view addSubview:imageViewTop];
[self.view addSubview:topView];
[self.view addSubview:imageViewBottom];

[self nextAnimation]

-(void)nextAnimation{

//picture loop
imageViewTop.image = imageViewBottom.image;
imageViewBottom.image = [imageArray objectAtIndex:[imageArray count] - 1];

[imageArray …

我想知道如何在附加图像中执行双滑块.

我正在看这个代码来修改它.我想知道如何让2个滑块允许用户选择所需的时间.

我遇到的问题是我如何有2个滑块来显示像图像？

http://www.cocoacontrols.com/controls/tb_circularslider

任何评论都非常感谢.

我有这个查询来显示

有2张桌子,我将从表格翻新中获得翻新的数量,而客户ID和名称来自表1,客户.

SELECT c.[Customer-ID], c.name, COUNT(*)"Number of Renovation"
FROM CUSTOMER c, RENOVATION r
WHERE c.[Customer-ID] = r.[Customer-ID]
GROUP BY c.[Customer-ID], c.name
HAVING Count(*) in 
(SELECT COUNT(*) FROM RENOVATION GROUP BY [Customer-ID])
ORDER BY c.[customer-id]

这不是我查询的正确方法,任何人都知道如何缩短查询？或其他方式吗？虽然它仍然找到答案.我顺便学习SQL服务器.

我有一些KML数据定义了地图上的区域,如下所示:

131.0764742247829,-15.80786022929951,0 132.6357700620065,-16.54895727734661,0
134.1119108999971,-17.28040233069844,0 135.8545033459996,-18.1298170074137,0 
137.7396886168202,-19.07860187595016,0 140.011948401144,-20.18462043802856,0 
142.3114600417346,-21.19369381963822,0 144.1566045495202,-22.15731684591415,0

我想在我的iOS应用程序中确定用户的当前位置是否在此定义区域内.我怎样才能做到这一点？

编辑:我将arc4random()替换为arc4random_uniform()以进行修复

我正在使用试飞来监控崩溃.一直在修复bug,但是我遇到了这个bug,我不知道为什么索引这么大.

 -[__NSArrayM objectAtIndex:]: index 4294967295 beyond bounds for empty array

很可能这就是bug的地方

for (NSUInteger i = 0; i < count; ++i) {
        // Select a random element between i and end of array to swap with.
        int nElements = count - i;
        int n = (arc4random() % nElements) + i;
        [randomName exchangeObjectAtIndex:i withObjectAtIndex:n];
        [randomImgName exchangeObjectAtIndex:i withObjectAtIndex:n];
        [randomID exchangeObjectAtIndex:i withObjectAtIndex:n];
    }

这引起了崩溃

//Frog Name Caption
    NSString * tempCaption = [defaultFrogImageCaption objectAtIndex:[defaultFrogImageCaption count]-1];
    self.dFrogID = [defaultFrogID objectAtIndex:[defaultFrogID count]-1];

我相信这是错误,但我不知道如何解决错误.

感谢所有的评论和帮助

-(void)defaultFrogSetup
{ …

我厌倦了查看SF的解决方案,但无法找到解决方案.也许我错过了请帮助.

我试图通过循环遍历所有KML来检查用户精确定位多边形.这个应用总是崩溃@这一点:

            [mapView addOverlay:overlayPolygon];

            // zoom the map to the polygon bounds
            [mapView setVisibleMapRect:overlayPolygon.boundingMapRect animated:YES];

问题代码:

//create KML in hidden Mapview
-(void)loadKML:(NSMutableArray *)kmlNameArray
{    
    //dispatch_group_t group = dispatch_group_create();


    //remove polygon and redraw again.
    [NSThread detachNewThreadSelector: @selector(spinEnd) toTarget:self withObject:nil];

    [mapView removeOverlays:mapView.overlays];
    [inUserRangeArray removeAllObjects];
    [inUserRangeArrayObjectIndex removeAllObjects];
    [scrollview removeFromSuperview];
    [pageControl removeFromSuperview];
    [NSThread detachNewThreadSelector: @selector(spinBegin) toTarget:self withObject:nil];

    NSArray *sysPaths = NSSearchPathForDirectoriesInDomains( NSDocumentDirectory, NSUserDomainMask, YES );
    NSString *docDirectory = [sysPaths objectAtIndex:0];   


    for (int e=0; e<[kmlNameArray count]; e++) 
    {        
        //NSString *kmlNameStr = [kmlNameArray objectAtIndex:e];
        Frog *kmlID …

我试图根据初始查询的情绪来预测我的coredate所有情绪设置为8.我将每秒从0到7调用以更新tableview.

但我明白了

Terminating app due to uncaught exception 'NSInvalidArgumentException', reason: 'Can't use in/contains operator with collection 8 (not a collection)'

我应该使用CONTAINS或其他运算符来谓词吗？

NSString* filter = @"%K CONTAINS[cd] %@";
NSPredicate *getMoodPred = [NSPredicate predicateWithFormat:filter, @"mood", mood];
NSLog(@"getmood %@",getMoodPred); //getmood mood CONTAINS[cd] "7"
NSArray *getMoodArray = [[VPPCoreData sharedInstance]allObjectsForEntity:@"Song" orderBy:Nil filteredBy:getMoodPred];