IOS

Objetive-C learning _ GCD learning notes, objetive-c_gcd GCD: Apple's solution for multi-core parallel operations GCD automatically manages the thread lifecycle (creating threads, scheduling tasks, and destroying threads) Queue: used to store tasks (

"Automatic Layout" of IOS Layer"   Today, when I answered a question to a foreign friend on stackoverflow, I encountered the problem of automatic Layer layout. Write it here and share it with the people you need. Does Layer Support

Convert NSArray and NSDictionary to JSONString, nsdictionarynsarray 1. Convert NSArray to JSONString //NSArray+JSONString.h@interface NSArray (JSONString)- (NSString *)jsonStringWithPrettyPrint:(BOOL)prettyPrint;@end @implementation NSArray

IOS --- optimize lazy (lazy) mode and asynchronous loading mode when tableview loads Images For example, when we use the Netease news App and watch so many news, not all of them are of interest to us. Sometimes we just slide fast, if you want to

Multiple unknown parameters in IOS -(Void) setGradientColor :( UIColor *) beginColor transitionColor :( UIColor *) transitionColor,... NS_REQUIRES_NIL_TERMINATION;   // NS_REQUIRES_NIL_TERMINATION, used for non-nil end check during

Use of ios UICollectionView There are two methods to use UICollectionView: one is to inherit UICollectionViewController, which will bring a UICollectionView; the other is to place a view in a common UIViewController. I prefer the second type. The

IOS performance optimization skillsAnalyze performance bottlenecks using static Analyze and runtime Profile tools and optimize performance. Based on the problems encountered during development, You can optimize the performance from the following

IOS status bar StateBar text black and white Control NavigationBar and stateBar must be matched with each other. They must be dark-light or light-dark. However, it is sometimes found that changing the status bar color is invalid:  

OC Implementation of heap sorting and OC Implementation of heap sorting /* We recommend that you first check the heap Adjustment Method and understand the heap adjustment. Even if the sorting algorithm has mastered */-(void) viewDidLoad {[super

IOS implements automatic cyclic rolling advertisement-ScrollView optimization and encapsulation, and ios-scrollview I. Problem Analysis In many apps, we will see a circular scrolling view, such as an advertisement. In fact, it is not

IOS learning notes gesture password (original), ios2015-04-15 //// WPSignPasswordView. h // network cast /// Created by wangtouwang on 15/4/9. // Copyright (c) 2015 wangtouwang. all rights reserved. // # import @ class WPSignPasswordView; @

Create multiple threads for iosGCD Oh, try to split it into a section. This makes it hard for everyone to see clearly. I have three ways to create a thread. The Code is as follows:     # Import "ViewController. h"   @ Interface ViewController ()   @

Analysis of run loop in iOSAnalysis of run loop in iOS Although runloop is an important concept related to thread thinking, runloop in cocoa is not used much at all, but it is not getting started with its "why" in related blog posts ". So a few days

IOS animation usage Summary First   CATransition * transition = [CATransition animation]; transition. duration = 0.4f; // time transition. type = kCATransitionPush; // animation effect transition. subtype = kCATransitionFromBottom; // animation

IOS programming-Socket transmission of Chinese Characters In Socket programming, the client uses CFReadStreamRef readStream;CFWriteStreamRef writeStream; Obtain the input and output streams. After the proxy is set, use uint8_t buffer[1024];length = (

IOS Study Notes OC-common constants, 2015-04-10oc- A common constant (I) about button 1 UIControlState ---> button State A UIControlStateNormal default state general State B UIControlStateHighlighted highlighted State C UIControlStateDisabled

NSURL for IOS development 1: NSURL initialization method: NSURL* Url = [NSURLURLWithString: @ www. bkjia. comid = 1];  2: solutions to NSURL initialization failures.Transcode the passed NSString to UTF8.1: solution to URLWithString

UISegmentedControl for basic iOS controls * ** The UISegmentedControl control is a commonly used control in iOS. As an iOS Mobile phone device screen, multiple UIButton is put at once, which obviously does not feel beautiful, as a manager who does

IOS development UI-program startup principle and UIApplicationI. UIApplication1. Brief Introduction(1) A UIApplication object represents an application. A UIApplication object represents an application.(2) Each application has its own UIApplication

Ios UIScrollView cannot respond to the TouchesBegin: Event Solution 1: @ Property MyScrollView * scrollView; 2: Add category: MyScrollView + Touch to MyScrollView 3: implement the following three methods in the category: @ Implementation