小编fuz*_*uzz的帖子

我正在运行Instruments Tool(Leaks)并且正在接收QuartzCore库中的内存泄漏,并且不知道我的代码中究竟发生了什么.通常我能够确定发生泄漏的位置,但仪器工具并没有给我任何地方查看此类信息.

在诊断这样的泄漏方面我还能看到一些其他的东西吗？

给出以下示例：

class ProfileTab: Identifiable {
    let id = UUID()
    let name: String

    init(name: String) {
        self.name = name
    }
}

class ProfileQuoteTab: ProfileTab {
    let answer: String
    let prompt: String

    init(name: String, answer: String, prompt: String) {
        self.answer = answer
        self.prompt = prompt
        super.init(name: name)
    }
}

class ProfileImageTab: ProfileTab {
    let image: Image

    init(name: String, image: Image) {
        self.image = image
        super.init(name: name)
    }
}

struct ContentView: View {
    let tabs: [ProfileTab] = [
        ProfileQuoteTab(name: "This is a quote …

只是想知道为什么我会在构建我的应用程序时在Debug(iPhone模拟器)中获得1个警告并在Debug(iPhone设备)中获得77个警告!

除了"默认隐藏的符号"(因为这不起作用)之外,我可以在项目设置中修改某些内容以从构建中删除这些警告吗？我想念绿色的Build Successful酒吧.

ld: warning: unsigned long const& std::min<unsigned long>(unsigned long const&, unsigned long const&)has different visibility (default) in /Users/fulvio/Projects/zxing/iphone/ZXingWidget/build/Debug-iphoneos/libZXingWidget.a(QRCodeReader-C190599C861BFE46.o) and (hidden) in /Users/fulvio/Projects/MyApp/build/MyApp.build/Debug-iphoneos/MyApp.build/Objects-normal/armv7/ScanViewController.o

嗨我有一个tabbar控制器,其中包括两个页面A和B.现在我只想添加TTTableViewDragRefreshDelegate到页面A.

如果我把代码:

- (id<TTTableViewDelegate>) createDelegate {
  TTTableViewDragRefreshDelegate *delegate = [[TTTableViewDragRefreshDelegate alloc] initWithController:self];

  return [delegate autorelease];
}

UITabBarController然后进入A和B都刷新了,所以我把上面的代码放到A的视图控制器中并UITabBarController像这样调用A的视图控制器:

if (_page == APage) {
  AViewController *_aViewController = [[[AViewController alloc] init] autorelease];             

  self.dataSource = _aViewController.dataSource; 
  ...
}

但似乎不起作用,页面A仍然没有得到拖累和刷新.那么我怎样才能获得TTTableViewDragRefreshDelegateA页中的A UITabBarController？

这是AViewController初始代码:

- (id)init {
  if (self = [super init]) {
    self.variableHeightRows = YES;
    id<TTTableViewDataSource> ds = [APageDataSource dataSourceWithItems:nil];
    ds.model = CreateTabModelWithCurrentSettings();
    self.dataSource = ds;
  }

  return self;
}

如何让页面A获取所有AViewController属性？就像AViewController模特一样dataSource …

我想要做的是在select元素中填充数据.我正在使用以下代码,用户从一个下拉列表中选择一个SubjectCategory,然后填充下一个select元素的html.处理程序本身工作得很好,它返回我需要放在select元素中的正确html.

另外,请记住,我最终克隆了这两个选择元素,并需要相应地填充它们.

问题是$elem总是返回null.

我猜这是这行代码的问题,但不太确定(请记住我也克隆了这两个选择元素):

var $elem = $this.closest('div').prev().find('select');

$(".SubjectCategory").live("click", function () {
    var $this = $(this);
    var $elem = $this.closest('div').next().find('select');
    var a = $this.val();

    $.get("/userControls/BookSubjectHandler.ashx?category=" + a, {}, function (data) {
        $elem.html(data);
    });
});

<div class="singleField subjectField">
  <label id="Category" class="fieldSml">Subject Matter</label>
  <div class="bookDetails ddl"><select id="ddlSubjectMatter" class="fieldSml SubjectCategory"></select></div>

  <label id="Subjects" class="fieldSml">Category</label> 
  <div class="bookDetails ddl" id="subjectMatter"><select id="ddlSubjects" class="fieldSml Subjects"></select></div>
</div>

我正在尝试使用Ruby将二进制文件转换为十六进制文件.

目前我有以下内容:

File.open(out_name, 'w') do |f|
  f.puts "const unsigned int modFileSize = #{data.length};"
  f.puts "const char modFile[] = {"
  first_line = true
  data.bytes.each_slice(15) do |a|
    line = a.map { |b| ",#{b}" }.join
    if first_line
      f.puts line[1..-1]
    else
      f.puts line
    end
    first_line = false
  end
  f.puts "};"
end

这是以下代码生成的内容:

const unsigned int modFileSize = 82946;
const char modFile[] = {
 116, 114, 97, 98, 97, 108, 97, 115, 104, 0, 0, 0, 0, 0, 0
, 0, 0, 0, 0, 0, …

我有这样的Java代码:

public static byte[] generateMac(byte[] key, byte[] cipherText,int offset,int length,int mac_size_bits)
{
    byte[] result = null;
    KeyParameter keyParam = null;
    try {
        keyParam = new KeyParameter(key);
        CBCBlockCipherMac blockCipherMac = new CBCBlockCipherMac(new AESEngine(),mac_size_bits);
        result = new byte[blockCipherMac.getMacSize()];
        blockCipherMac.init(keyParam);
        blockCipherMac.update(cipherText, offset, length);
        blockCipherMac.doFinal(result, 0);
    } catch (Exception e) {
        // System.out.println(e);
        return null;
    } finally {
        keyParam = null;
    }
    return result;
}

在iPhone上,我这样涂鸦:

- (NSData *)generateMac:(NSData *)key cipherText:(NSData *)cipherText offset:(int)offset length:(int)length mac_size_bits:(int)mac_size_bits

我的问题是,我应该使用哪种方法CBCBlockCipherMac,keyparameters在iPhone中有人可以帮助我吗？

我正在开发一款基于回合制的iOS游戏,并尝试填充玩家参与的游戏列表.

for (unsigned i = 0; i < [matches count]; i++)
{
    // Only load data for games in progress.
    // NOTE: Might want to handle finished games later.
    if ([matches[i] status] != GKTurnBasedMatchStatusEnded)
    {

        // Send off another block to retrieve the match's data.
        [(GKTurnBasedMatch*)matches[i] loadMatchDataWithCompletionHandler: ^(NSData *matchData, NSError *error)
         {
             // Prepare the game.
             Game* game;
             if (matchData.length == 0)
             {
                 // If the match data is empty, this is a new game. Init from scratch.
                 game = …

这个问题从之前的答案继续.

我有以下内容CAShapeLayer:

- (CAShapeLayer *)gaugeCircleLayer {

    if (_gaugeCircleLayer == nil) {
        _gaugeCircleLayer = [CAShapeLayer layer];
        _gaugeCircleLayer.lineWidth = self.gaugeWidth;
        _gaugeCircleLayer.fillColor = [UIColor clearColor].CGColor;
        _gaugeCircleLayer.strokeColor = self.gaugeTintColor.CGColor;
        _gaugeCircleLayer.strokeStart = 0.0f;
        _gaugeCircleLayer.strokeEnd = self.value;
        _gaugeCircleLayer.lineCap = kCALineCapRound;
        _gaugeCircleLayer.path = [self insideCirclePath].CGPath;

        CAShapeLayer *cap = [CAShapeLayer layer];
        cap.shadowColor = [UIColor blackColor].CGColor;
        cap.shadowRadius = 8.0;
        cap.shadowOpacity = 0.9;
        cap.shadowOffset = CGSizeMake(0, 0);
        cap.fillColor = [UIColor grayColor].CGColor;
        [_gaugeCircleLayer addSublayer:cap];
    }

    return _gaugeCircleLayer;
}

然后我有以下内容UIBezierPath:

- (UIBezierPath *)insideCirclePath {

    CGPoint arcCenter …

我正在执行以下操作以便hue从以下位置检索UIColor():

let rgbColour = UIColor(red: 1.0, green: 0.0, blue: 0.0, alpha: 1.0)
var hue: CGFloat = 0
var saturation: CGFloat = 0
var brightness: CGFloat = 0
var alpha: CGFloat = 0
rgbColour.getHue(&hue, saturation: &saturation, brightness: &brightness, alpha: &alpha)

println("\(hue),\(saturation),\(brightness)")

输出:

1.0,1.0,1.0

根据这个链接,我打算获得0.0,1.0,1.0RGB(红色)1.0,0.0,0.0.

难道我做错了什么？