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Introduction to Chisel What is Chisel? Chisel is an open-source set of LLDB commands from Facebook to assist developers in debugging iOS applications. The commands in chisel are run based on the python script interpreter supported by LLDB. That is to say: chisel is actually a collection of Python scripts. These Python scripts splice comma ...

The entry of all app s is a main function int main(int argc, char * argv[]) { @autoreleasepool { return UIApplicationMain(argc, argv, nil, NSStringFromClass([AppDelegate class])); } } It can be found that the entire iOS application is contained in an automatic release pool block@autoreleasepool {} is essentially a structure: ...

1, Foreword Multithreading schemes that can be used in iOS development include: pthread: a cross platform multithreading solution implemented in pure C language, which is difficult to use. It is not recommended on iOS platform.NSThread: the object-oriented thread object under iOS platform is relatively easy to use, but it needs developers to ...

GCD queue usage file First look at the official documents. DispatchQueue is a class object, which inherits from DispatchObject; DispatchObject implements OS_ Method in object, guess OS_object may be a protocol, which is not found in the document First look at DispatchObject: func activate() Activates the dispatch object. func resume() ...

Function of this example: use gcd to sort an array with 40000 numbers, and the numbers in the array are randomly generated The generated array code is as follows _numsMutableArray = [[NSMutableArray alloc] init]; for (int i = 0; i < 40000; i++) { NSNumber *temp = [NSNumber numberWithInt:arc4random_uniform(1000000)]; ...

preface In the process of iOS development, we often use three kinds of timers: NSTimer timer, CADisplayLink timer and GCD timer. This article only introduces NSTimer timer. What is NSTimer runLoop literally means a loop in operation. Its function is to keep the APP running continuously and deal with various events of the APP, such as cli ...

Role of the agreement: Similar to the interface, it is used to define the specifications that multiple classes should follow, but it will not provide the implementation of these methods, and the implementation of methods is left to the class. Abstract relationships between specifications, classes, and instances As can be seen from the figu ...

Runloop: run loop - dead loop Main purpose: improve performance, do what you have and sleep when you have nothing. reference resources https://blog.csdn.net/callauxiliary/article/details/107419854 Main application 1. Ensure that the thread runs all the time, and the processing of events, such as touch events and clock events, is completed by ...

1, Foreword As mentioned above, under the OC/Swift mix, the following suggestions are made for the data types of attributes or parameters: 1. Use immutable types as much as possible and immutable types as little as possible. (suggestions: NSString *, NSArray *, - NSDictionary *)2. Use generics as much as possible to specify the type of el ...

preface Hello, everyone, I've been learning to encode with Swift recently. Because many previous projects were implemented with OC, I'm still in the stage of learning about Swift. In order to improve my learning efficiency, I will set a short-term goal for myself every time. This time, in order to speed up my starting Swift, my goal is to comp ...