小编Bor*_*kyi的帖子

我可以做以下任何一项吗？他们会正确锁定/解锁同一个物体吗？为什么或者为什么不？假设有许多相同的线程使用全局变量"obj",它在所有线程启动之前被初始化.

1.

@synchronized(obj) {
    [obj release];
    obj = nil;
}

2.

@synchronized(obj) {
    obj = [[NSObject new] autorelease];
}

我在我的项目中使用WKWebView来实现基于Web的授权UI.我使用[NSHTTPCookieStorage sharedHTTPCookieStorage]来保留整个应用程序的用户会话cookie,并在WKWebView重定向到我们的后端页面时保持用户身份验证.

问题是,在这种情况下,看起来WKWebView会忽略其他域的"Set-Cookie"标头.例如:

设置身份验证过程的初始请求:

GET /api2/providers/misfit/start/ HTTP/1.1
Host: api.welltory.com
Accept: text/html,application/xhtml+xml,application/xml;q=0.9,*/*;q=0.8
Accept-Encoding: gzip, deflate
Connection: keep-alive
Proxy-Connection: keep-alive
Cookie: csrftoken=haF3PX9l6VB9DrTJTNEQvsjsAiMZTYNC;sessionid=txo4fhez18vl6mvjuwlelph1uyn1pkau
User-Agent: Mozilla/5.0 (Macintosh; Intel Mac OS X 10_11_5) AppleWebKit/601.6.17 (KHTML, like Gecko) Version/9.1.1 Safari/601.6.17
X-CSRFToken: haF3PX9l6VB9DrTJTNEQvsjsAiMZTYNC
Referer: https://api.welltory.com/api2/api/version/
Accept-Language: ru

此请求的结果是重定向到目标服务登录页面,我们在其中列出了以下请求:

GET /auth/dialog/authorize?scope=public+birthday+email+tracking+session+sleeps&state=NdhVfDpcCTfjCkuEbgnoj0E4s8pnw6wv&client_id=ZkwJzk9QvaEkzL4M&response_type=code&redirect_uri=https%3A%2F%2Fapi.welltory.com%2Fapi2%2Fproviders%2Fmisfit%2Ffinish%2F%3Fredirect_state%3DNdhVfDpcCTfjCkuEbgnoj0E4s8pnw6wv HTTP/1.1
Host: api.misfitwearables.com
Accept: text/html,application/xhtml+xml,application/xml;q=0.9,*/*;q=0.8
X-CSRFToken: haF3PX9l6VB9DrTJTNEQvsjsAiMZTYNC
Connection: keep-alive
Proxy-Connection: keep-alive
Cookie: csrftoken=haF3PX9l6VB9DrTJTNEQvsjsAiMZTYNC;sessionid=txo4fhez18vl6mvjuwlelph1uyn1pkau
User-Agent: Mozilla/5.0 (Macintosh; Intel Mac OS X 10_11_5) AppleWebKit/601.6.17 (KHTML, like Gecko) Version/9.1.1 Safari/601.6.17
Accept-Language: ru
Referer: https://api.welltory.com/api2/api/version/
Accept-Encoding: gzip, deflate

HTTP/1.1 302 Moved …

我已经IBDesignables在接口视图中创建了可重用的类来渲染xib.

@interface ReusableView ()
@property (nonatomic, strong) UIView *contentView;
@end

@implementation ReusableView

- (instancetype)initWithFrame:(CGRect)frame {
    self = [super initWithFrame:frame];
    [self setupXib];

    return self;
}

- (instancetype)initWithCoder:(NSCoder *)aDecoder {
    self = [super initWithCoder:aDecoder];
    [self setupXib];

    return self;
}

- (void)setupXib {
    self.contentView = [self loadFromNib];

    self.contentView.frame = self.bounds;
    self.contentView.autoresizingMask = UIViewAutoresizingFlexibleWidth | UIViewAutoresizingFlexibleHeight;

    [self addSubview:self.contentView];
}

- (UIView *)loadFromNib {
    NSBundle *bundle = [NSBundle bundleForClass: [self class]];
    UINib *nib = [UINib nibWithNibName:NSStringFromClass([self class]) bundle:bundle];
    UIView *view = (UIView *)[[nib …

我在ARMv7 IOS设备上使用标准方法调配,它对我来说非常完美.

但是当我编译arm64的代码时 - 它无法从新方法调用原始方法

我调配的主要目的 - 在我的应用程序的内部方法中使用参数在另一种方法中.

我有原始的方法-(void)insertdata:(id)text,我想改变它,-(void)patchedCall:(id)text并在新方法中调用原始方法.

码:

static IMP sOriginalImp = NULL;

@interface TextOverrides: NSObject
+(void)load;
-(void)patchedinsert:(id)text;
@end

@implementation TextOverrides

+(void)load
{
    //Get Implementation of original method

    Class originalClass = NSClassFromString(@"DataViewController");
    Method originalMeth = class_getInstanceMethod(originalClass, @selector(insertdata:));

    //Save original method implementation
    sOriginalImp = method_getImplementation(originalMeth);

    // Get implementation of replacement method
    Method replacementMeth = class_getInstanceMethod(NSClassFromString(@"TextOverrides"), @selector(patchedCall:));

    //Replace methods
    method_exchangeImplementations(originalMeth, replacementMeth);
}

-(void)patchedCall:(id)text
{
    @synchronized(self){
        //Call of original method that we save
        sOriginalImp(self, @selector(insertdata:), text);

        //Make …

我知道很多方法需要调用它的超类方法,有些方法不需要,

我正在寻找关于方法混合的方法.它在load方法中初始化,在教程中没有[super load].

我想知道它是错还是没有必要打电话[super load].

+ (void)load {
    static dispatch_once_t onceToken;
    dispatch_once(&onceToken, ^{
        Class class = [self class];

        // When swizzling a class method, use the following:
        // Class class = object_getClass((id)self);

        SEL originalSelector = @selector(pushViewController:animated:);
        SEL swizzledSelector = @selector(flbs_pushViewController:animated:);

        Method originalMethod = class_getInstanceMethod(class, originalSelector);
        Method swizzledMethod = class_getInstanceMethod(class, swizzledSelector);

        BOOL didAddMethod =
        class_addMethod(class,
                        originalSelector,
                        method_getImplementation(swizzledMethod),
                        method_getTypeEncoding(swizzledMethod));

        if (didAddMethod) {
            class_replaceMethod(class,
                                swizzledSelector,
                                method_getImplementation(originalMethod),
                                method_getTypeEncoding(originalMethod));
        } else {
            method_exchangeImplementations(originalMethod, swizzledMethod);
        }
    });
}

#pragma mark - Method …

例如,让我们考虑ARC下面的代码:

#import <Foundation/Foundation.h>
#import <objc/runtime.h>

@implementation NSDate (MyEvilHack)

+ (void)load {
    Method originalMethod = class_getInstanceMethod(self, @selector(copyWithZone:));
    Method newMethod = class_getInstanceMethod(self, @selector(myCopyWithZone:));
    method_exchangeImplementations(originalMethod, newMethod);
}

- (id)myCopyWithZone:(NSZone *)zone {
    id result = [self myCopyWithZone:zone];
    // do customization
    return result;
}

@end

在此代码中,原始copyWithZone:方法隐式返回一个保留对象,因为它属于copy方法族.但我myCopyWithZone:的不是.

我希望崩溃,但看起来这个代码正常工作.当然,我可以重命名我的方法以避免混淆.但我很好奇在引擎盖下究竟发生了什么？

自10.12 Sierra主要更新以来,我无法仅在设备上编译我的一个iOS项目.但非常奇怪,它在模拟器上工作.我试图在Xcode中删除并重置我的开发帐户,硬重启,删除并重置钥匙串中的所有证书等.XCode 8.0.我也尝试过8.1 beta,同样的.

错误 :

SecKey API返回:-25304,(null)/ Users/****/Library/Developer/Xcode/DerivedData/**** - epkppprfmidyatftsvnxgjqsawit/Build/Products/Debug-iphoneos/****.app/Frameworks/libswiftAVFoundation.dylib:未知错误-1 = ffffffffffffffff错误:任务失败,退出1信号0 {/ usr/bin/codesign' - force'' - 签名''C47B52FDE2CABFC81D33BED8937984AF8BC6DC33'' - verbose''/ Users/****/库/开发商/ Xcode中/ DerivedData/**** - epkppprfmidyatftsvnxgjqsawit /建设/产品/调试-的iPhoneOS/***应用程序/框架/ libswiftAVFoundation.dylib"

我试图搜索以防止我当前库中的方法Swizzle,但我或多或少发现每个文档或博客文章是关于如何实现Swizzling.关于Method swizzling,我有几个问题,我无法找到所有问题.

• 如何在运行时检测方法Swizzling？
• 如果有一个方法Swizzle如何防止它？

我知道方法调整的危险,并且已经在这里查看了相关的帖子,但是找不到相关信息来阻止它.

如果上述主题中有任何文档或博客文章,我将非常感谢您的帮助.

我需要使用自动布局在其超视图的右边界外放置一个视图.

我试图通过指定以下NSLayoutConstraint来做到这一点:

NSLayoutConstraint *leftConstraint = [NSLayoutConstraint constraintWithItem:self.downloadView
                                                                  attribute:NSLayoutAttributeLeft
                                                                  relatedBy:NSLayoutRelationEqual
                                                                     toItem:self.contentView
                                                                  attribute:NSLayoutAttributeWidth
                                                                 multiplier:1.0
                                                                   constant:0.0];

self.downloadView包含的是self.contentView的子视图.通过这样做iOS抱怨有以下异常:

*** Terminating app due to uncaught exception 'NSInvalidArgumentException', reason: '*** +[NSLayoutConstraint constraintWithItem:attribute:relatedBy:toItem:attribute:multiplier:constant:]: Invalid pairing of layout attributes'

有人可以解释为什么我不能配对这两个属性,我怎样才能实现我的目标？

我该怎么打电话

print(NSDate()) 

和而不是接收通常的响应,获得所述一个我有一个命名的函数getString()是一个部分extension的NSDate.

这是我的扩展:

extension NSDate {

   //NSDate to String
    public func getString() -> String {
        let dateFormatter = NSDateFormatter()
        dateFormatter.dateFormat = "yyyy-MM-dd HH:mm:ss ZZZ"
        dateFormatter.locale = NSLocale.currentLocale()

        return dateFormatter.stringFromDate(self)
    }
}

请注意,我不想只使用:

NSDate().getString()

Run Code Online (Sandbox Code Playgroud)

我想覆盖description这个类的原始.

更新:

所以,一切看起来像唯一的选择是方法调整,如果可能的话.

谁对赏金感兴趣？

当心

我这样做只是为了个人成长并理解这个概念,而不是计划在这种情况下使用它来运送应用程序,现在甚至不确定我可以使用它的场景.