ios 11 arkit

]; -}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, addTarget: The method is very important. The c

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,context:nil) The above is the

The block in iOS can be said to be a function pointer, but to be more precise, it should actually be the support of object-c to Lambda in c++11 or a variant of the language, the actual content is the same, C + + lambda I have a brief introduction, Now the block in iOSBlock's actual behavior and function are similar, the biggest difference is that the variable value can be accessed in the same scope. The blo

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 simulators command, which pops up the Devices and

Today, in the pop-up Uiprintinteractioncontroller, on the IOS10 and 11 of the ipad test, found that has been protrait direction pop-up, the results appear as a bug:Research for a long time, found that there is no implementation of the following proxy method:-(Uiviewcontroller *) Printinteractioncontrollerparentviewcontroller: (Uiprintinteractioncontroller *) Printinteractioncontroller;In fact, in the iOS9, do not implement this method, and, even if th

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"; *mulstr2=[mulstr copy]; [MulStr

"MyProtocal.h" #import "MulProtocal.h" @implementation person Main.m#import Four agentsTicketdelegate.h@protocol ticketdelegate Agent.h@protocol ticketdelegate, @interface agent:nsobject Person.h@class agent, @class ticketdelegate, @interface person:nsobject-(void) buyticket;//Proxy Properties @property (nonatomic , retain) ID Person.m#import "Person.h" #import "Agent.h" @implementation person-(void) buyticket{if (_delegate [_delegate Leftticketsnumber] > 0) {NSLog (@ "buy ticket");}} @endMain

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

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 Controller on one item of tabBarController to the Cont

(NO.00003) iOS games simple robot projection game forming notes (11) The robot has already fired bullets. Let's see how to set obstacles for players. We can see from the figure above that there are several obstacles in the machine and basket. Let's first look at how to implement them. Open SpriteBuilder and create SmallBrick. ccb in the Sprites folder. The type is Node. Drag a CCNodeColor node from the