ios 11 1 emojis

*tmpstr2 = [str1 substringfromindex:3]; // from the beginning of the string to the index position, not including the indexnsstring *tmpstr3 = [str1 substringtoindex:5]; //Nsrange is a struct, takes the range of a string, the first parameter starts from which index value, and the second parameter indicates how long it takesNsrange s = {6,3};nsstring *TMPSTR4 = [str1 substringwithrange: s];NSLog (@ "TMPSTR2 =%@", TMPSTR2);NSLog (@ "TMPSTR3 =%@", TMPSTR3);NSLog (@ "TMPSTR4 =%@", TMPSTR4);//4. Ge

Nsurlsesstion-(void) Setsessiondidbecomeinvalidblock: (Nullable Void (^) (nsurlsession *session, Nserror *error)) block;-(void) Setsessiondidreceiveauthenticationchallengeblock: (Nullable Nsurlsessionauthchallengedisposition (^) (NSURLSession *session, Nsurlauthenticationchallenge *challenge, nsurlcredential * _nullable __autoreleasing * _Nullable credential)) Block, .....-(void) Setsessiondidbecomeinvalidblock: (void (^) (nsurlsession *session, Nserror *error)) block { Self.sessiondidbecome

IOS network analysis-(Introduction to third-party AFNetworking3.0 on November 11), iosafnetworking3.0 AFNetworking3.0 is the latest version. I was going to introduce it to 2.6, but I decided not to introduce it soon. Interested friends can check it online. Now I start to get started. Currently, no third-party network library is used most frequently. From the beginning of NSURLConnection to the current NSURL

IOS review Note 11: Protocol and proxy1. FunctionMethods can be declared in the Protocol (variables cannot be declared ),As long as a class complies with this Protocol, it is equivalent to having all the method declarations in the Protocol.The parent class is subject to the Protocol, and the subclass also has methods in the Protocol.The protocol can also be bound to another protocol.The Base protocol NSObje

]; -}My value is set to [NSString stringwithformat:@ "%d", Nsunderlinestylesingle], Since there is no problem in iOS7, I always thought it was right! But in fact, in the iOS8, this is wrong! Reference: Https://developer.apple.com/library/ios/documentation/Cocoa/Conceptual/AttributedStrings/Articles/standardAttributes.htmlOriginally, Nsunderlinestyleattributename should be the NSNumber type, instead of [NSNumber numberwithint: Nsunderlinestylesingl

[IOS development-11] describes the attributes of UISlider slide and displays change values in real time when tags are used together. iosuislider (1) You can set an image on the next page of the previous page on the left and right sides of the slide bar; (2) Slide Track images can be set as gradient images. (3) because the sliding bar can interact with values, a

enumeration values in SwiftNote that this issue was addressed in IOS 8.3 SDK Beta 1 (12f5027d). For the SDK below this version, we can replace it with the following code: Let Options =unsafebitcast (NSStringDrawingOptions.UsesLineFragmentOrigin.rawValue | nsstringdrawingoptions.usesfontleading.rawvalue,nsstringdrawingoptions.self) Let frame = Text.boundingRectWithSize (Size, options:options, Attributes:d,c

a retaincount++ or Retaincount--The message 2>alloc retain copy mutablecopy new created string requires release3> class method creates a string and directly assigns a string, does not require manual management of memory1.2.4.2 copy and Mutablecopy(only used to copy strings) 1>Copy message, mutable and immutable strings are converted to immutable stringsNsmutablestring *mulstr=[[nsmutablestring alloc]initwithstring:@ "ABC"]; *str=@ "a";

IOS 11 Development Tutorial (10) iOS11 Wireless connection phone real-computer testIn Xcode 9.0, you can already perform a real-computer test by wirelessly connecting your phone. The following steps are described:(1) First you need to connect your phone to an Apple computer using a data cable.(2) Open Xcode and select window| in the menu bar The Devices and simul

IOS development-UI (11) UITabBarController and iosui Development Knowledge point: 1. Use UITabBarController 2. Use UITabBarItem For more information about TabBarController, refer to the two articles I have posted before. They are useful in actual development.The basic usage of RDVTabBarController and the prevention of Dual-click of tabbar jump from the Controlle

keywords: @interface and @endClass implementations use keywords: @implementation and @endThe Declaration and implementation of a method must begin with a + or-+ denotes class method (static method)-Represents an object method (dynamic method)There are 3 common scope of member variables:@public can be accessed globally@protected can only be accessed within the class and within subclasses@private can only be accessed within the classDeclaration implementation syntax for a classStatement:@interfac

development environment (3) Integrated Codepush SDK----IOS 6. Terminal CD to RN directory, then install Codepush SDK, terminal input NPM install--save React-native-code-push 7. Pull the rn.xcodeproj directly into the project in the React-native-code-push folder libraries the following figure 8. Join LIBZ.TBD 9. Add $ (srcroot)/... to the header Search paths in build settings. /node_modules/react-native-code-push 10. In appdelegate such as the followi

) btnonclick{ NSLog (@ "button was clicked"); Uitextfield *textfield1 = self.num1; Uitextfield *textfield2 = self.num2; NSString *text1 = Textfield1.text; NSString *text2 = Textfield2.text; NSLog (@ "Text 1 =%@, text 2 =%@", Text1, Text2); } @endCommand + R, enter in the text box and click the buttonConsole output:2015-03-14 11:33:07.342 First