小编The*_*s80的帖子

所以我有两张桌子:

表 uno:

id      |  gender  |   lf 
-------------------------
abc   |       1      |    2
cde   |       2      |    1
efg   |       1      |    2

表二人组:

id1    |    id2 
-------------------------
abc   |   cde

我的工作(到目前为止)查询从表uno中精确选择了2行:

(SELECT 
  * 
FROM
  uno 
WHERE gender = 1 
  AND lf = 2 
ORDER BY RAND() 
LIMIT 1) 
UNION
(SELECT 
  * 
FROM
  uno 
WHERE gender = 2 
  AND lf = 1 
ORDER BY RAND() 
LIMIT 1)

哪个回报:

id    |   gender     | lf
------------------------- …

在io7中,视图顶部的状态栏是一场噩梦.我真的设法让它工作,所以它将被放置在视图上方.我这样做:

- (void)viewDidLoad
{
    [super viewDidLoad];
    if ([[[UIDevice currentDevice] systemVersion] floatValue] >= 7.0) {
         self.view.backgroundColor=[UIColor colorWithRed:(152/255.0) green:(204/255.0) blue:(51/255.0) alpha:1] ;
        CGRect frame = self.topNav.frame; frame.origin.y = 20;
        self.topNav.frame = frame;
    }
....
}

现在我的状态栏位于我的导航栏上方.

但是当谈到调用的UIImagePickerController东西是不同的时.上面的代码没有任何效果.我试着这样做:

- (void)showImagePickerForSourceType:(UIImagePickerControllerSourceType)sourceType
{


    UIImagePickerController *imagePickerController = [[UIImagePickerController alloc] init];

 if ([[[UIDevice currentDevice] systemVersion] floatValue] >= 7.0) {

            CGRect frame = self.imagePickerController.frame; frame.origin.y = 20;
           self.imagePickerController.frame = frame;
        }

    imagePickerController.modalPresentationStyle = UIModalPresentationCurrentContext;
    imagePickerController.sourceType = sourceType;
    imagePickerController.delegate = self;
    self.imagePickerController = imagePickerController;
    self.imagePickerController.allowsEditing=YES;
....
} …

祝你有快乐的一年!

我遇到以下问题.第一个逻辑:

从服务器获取json.Json值始终是一个数字.将plist读入数组.NSLog数组,索引来自服务器的json值.

我的plist:

Key     Type     Value
Item 0  String   New York
Item 1  String   Atlanta

我的代码:

得到Json

NSString *url_req=@"http://domain.com/index.php";

            NSURLRequest *request = [NSURLRequest requestWithURL:[NSURL URLWithString:url_req]];

            NSData *response = [NSURLConnection sendSynchronousRequest:request
                                                     returningResponse:nil error:nil];

            NSError *jsonParsingError = nil;
            NSDictionary *json = [NSJSONSerialization JSONObjectWithData:response
                                                                      options:0 error:&jsonParsingError];

            NSArray *cityArray = [json objectForKey:@"city"];
            for (NSDictionary *alert in pestoArray ){
                myLoc = [[alert objectForKey:@"location"] integerValue];
            }

Json工作得很好!

读取plist和nslog对应的值:

NSString *path = [[NSBundle mainBundle] pathForResource:@"townsList" ofType:@"plist"];
 NSArray *arrayNo= [[NSArray alloc] initWithContentsOfFile:path];            
 NSLog(@"City %@",arrayNo[myLoc]);

到目前为止arrayNo[myLoc]将返回null但 …

我AVPlayerItem和他有问题AVQueuePlayer.目前我有很多1-2秒长的音乐文件和一个按顺序播放它们的队列播放器.

我想要的是知道音乐文件何时刚刚开始播放而不是在播放完毕后(通过AVPlayerItemDidPlayToEndTimeNotification).

这是因为我想在加载和播放新文件时运行一个函数.

我的代码:

 for (NSUInteger i = 0; i < [matchedAddr count]; i++)
{
    NSString *firstVideoPath = [[NSBundle mainBundle] pathForResource:[matchedAddr objectAtIndex:i] ofType:@"wav"];
    //NSLog(@"file %@",firstVideoPath);
    avitem=[AVPlayerItem playerItemWithURL:[NSURL fileURLWithPath:firstVideoPath]];
    [[NSNotificationCenter defaultCenter] addObserver:self
                                             selector:@selector(currentItemIs:)
                                                 name:AVPlayerItemDidPlayToEndTimeNotification
                                               object:avitem];

    [filelist addObject:avitem];
}
 player = [AVQueuePlayer queuePlayerWithItems:filelist];
[player play];


- (void)currentItemIs:(NSNotification *)notification
{
    NSString *asd=[seqArray objectAtIndex:currentColor];
    currentColor=currentColor+1;
    AVPlayerItem *p = [notification object];
    [p seekToTime:kCMTimeZero];

    if([asd isEqual:@"1"])
    {
        [UIView animateWithDuration:0.01 animations:^{
           one.alpha = 0;
        } completion:^(BOOL finished) {

            [UIView …

我的 MySql 查询没什么问题：我有两个表：

表时间轴

id | date      |  text
1    2013-10-13   Hello

餐桌代表

id | date      | text
1   2013-10-12   Its me again
1   2013-10-11   What?
1   2013-10-10   Lorem ipsum

我正在做的是UNION ALL时间线和代表。第一行应该始终是 时间线中的行（它总是一行），然后是代表表中的所有行，但按DESC顺序排列。

我的查询是以下一个（除了从 order by 之外可以正常工作）

select id,date,text from timeline UNION ALL select * from reps order by date desc

想想像评论（位于顶部）的东西，并按降序对评论进行回复，最新的在前。

先感谢您。

我的问题MKPointAnnotation在地图上丢失了.我会解释一下.

场景:

从服务器读取JSON - >在地图上删除引脚 - >单击某个引脚时,打开一个带有传递给视图的参数的新视图.该参数必须绑定到引脚.

我的代码到目前为止:

JSON(仅限示例用途)

{"places":[{"lat":"30.03","lng":"40.31","id":"1"}]}

读取JSON并向地图添加点:

NSString *markersJSON=@"http://test.com/json.php";
NSURLRequest *requestUsername = [NSURLRequest requestWithURL:[NSURL URLWithString:markersJSON]];
NSData *response = [NSURLConnection sendSynchronousRequest:requestUsername
                                             returningResponse:nil error:nil];
NSError *jsonParsingError = nil;
NSDictionary *json = [NSJSONSerialization JSONObjectWithData:response
                                                         options:0 error:&jsonParsingError];
markerArray = [json objectForKey:@"places"];

    for (NSDictionary *jsonObj in markerArray ){
        latJSON=[jsonObj objectForKey:@"lat"];
        lngJSON=[jsonObj objectForKey:@"lng"];
        alertID=[jsonObj objectForKey:@"id"];
        CLLocationCoordinate2D myCoordinate = {[latJSON doubleValue], [lngJSON doubleValue]};
        MKPointAnnotation *point = [[MKPointAnnotation alloc] init];
        point.coordinate = myCoordinate;
        point.title=[jsonObj objectForKey:@"title"];
        point.subtitle=[jsonObj objectForKey:@"description"];        
        [self.mapView addAnnotation:point];
    }

单击注释时,使用与引脚对应的JSON中的变量"id"打开新视图.

- …