YogevSitton-zz

@property (atomic, strong) NSString *exampleAtomicProperty;
@property (nonatomic, strong) NSString *exampleNonAtomicProperty;

YogevSitton-zz

static inline void reallySetProperty(id self, SEL _cmd, id newValue, 
      ptrdiff_t offset, bool atomic, bool copy, bool mutableCopy) 
    {
        id oldValue;
        id *slot = (id*) ((char*)self + offset);

        if (copy) {
            newValue = [newValue copyWithZone:NULL];
        } else if (mutableCopy) {
            newValue = [newValue mutableCopyWithZone:NULL];

YogevSitton-zz

DispatchQueue.global(qos: .utility).sync {
    // Background Task
    DispatchQueue.main.sync {
        // App will crash
    }
}

YogevSitton-zz

let customSerialQueue = DispatchQueue(label: "com.yogevsitton.MyApp.myCustomSerialQueue")

customSerialQueue.sync {
    // Synchronous code
    customSerialQueue.sync {
        // This code will never be executed and the app is now in deadlock
    }
}

YogevSitton-zz

DispatchQueue.global(qos: .background).async {
    // Do some background work
    DispatchQueue.main.async {
        // Update the UI to indicate the work has been completed
    }
}

YogevSitton-zz

DispatchQueue.global(qos: .utility).async {
    // Asynchronous code running on the low priority queue
}

DispatchQueue.main.async {
    // Asynchronous code running on the main queue
}

DispatchQueue.global(qos: .userInitiated).sync {
    // Synchronous code running on the high prioriy queue

YogevSitton-zz

let customSerialQueue = DispatchQueue(label: "com.yogevsitton.MyApp.myCustomSerialQueue")
customSerialQueue.async {
    // Code
}


let customConcurrentQueue = DispatchQueue(label: "com.yogevsitton.MyApp.myCustomConcurrentQueue", attributes: .concurrent)
customConcurrentQueue.async {
    // Code
}

YogevSitton-zz

extension CustomStringConvertible {
    var description : String {
        var description: String = ""
        if self is AnyObject {
            description = "***** \(self.dynamicType) - <\(unsafeAddressOf((self as! AnyObject)))>***** \n"
        } else {
            description = "***** \(self.dynamicType) *****\n"
        }
        let selfMirror = Mirror(reflecting: self)
        for child in selfMirror.children {