从入门到精通swift编程未小码哥课件源码瑞客1期day24oc

@M了个 实力ITn//MARK:类似于OC中的#pragman//MARK:-类似于OC中的#pragmamarkn//TODO:n//FIXME:#ifos(macOS)||//CPU架构：i386\x86_64\arm\arm64#elseifarch(x86_64||arch(arm64)swift#elseifswift(<5)&&#elseif#elseifcanImport(Foundation)#if#if#ifdebug模式debug模式#ifDEBUGreleasefuncfunclog<T>(_msg:file:NSString=#file,line:Int=#line,fn:String=#function){#ifDEBUGletprefix= print(prefix,msg)}ifif#available(iOS10,macOS10.12,*)对于iOS平台，只在iOS10对于macOS平台，只在macOS10.12最后的*}@available@available(iOS10,macOS10.15,*) structStudent@available(*,unavailable,renamed:"study")funcstudy_(){}funcstudy()@available(iOS,deprecated:@available(macOS,deprecated:10.12)funcrun(){}} 用法参考：p编译器自动生 n也可以删掉@UIApplicationMain，自定 Swift调用n新建1个桥接头文件，文件名格式默认为：{targetName}-Bridging-n在{targetName}-Bridging-Header.h文件中#importOC需 给Swift的内#import#import intintsum(inta,int@interface:@property(nonatomic,assign)NSInteger@property(nonatomic,copy)NSString-(instancetype)initWithAge:(NSInteger)agename:(NSString+ WithAge:(NSInteger)agename:(NSString-+-(void)eat:(NSString*)foodother:(NSString+(void)eat:(NSString*)foodother:(NSString*)other;Swift调用OC– Swift调用OC– @implementation-(instancetype)initWithAge:(NSInteger)agename:(NSString*)name{if(self=[superinit]){self.age=age;=name;}return}+(instancetype) WithAge:(NSInteger)agename:(NSString*)name{return[[selfalloc]initWithAge:agename:name];}+(void)run{ +run");(void)run{NSLog(@"%zd%@-run",_age,_name);+(void)eat:(NSString*)foodother:(NSString*)other{ +eat%@%@",food,other);(void)eat:(NSString*)foodother:(NSString*)other{NSLog(@"%zd%@-eat%@%@",_age,_name,food,other);}intsum(inta,intb){returna+b;varvarp=MJ (age:10,name:"Jack")p.age=18="Rose"p.run()//18Rose-runp.eat("Apple",other:"Water")//18Rose-eatApple.run().eat("Pizza",other:"Banana")+eatPizzaprint(sum(10,20))//Swift调用OCSwiftvarvarp=MJ (age:10,name:"Jack")p.age=18="Rose"p.run()//18Rose-runp.eat("Apple",other:"Water")//18Rose-eatApple.run().eat("Pizza",other:"Banana")+eatPizzaprint(sum(10,20))//Swift调用OCSwiftSwift调用OCn如果C语 给Swift的函数名跟Swift中的其他函数 p可以在Swift中使用@_silgen_name修改CCintsum(inta,intb){returna+b;}////@_silgen_name("sum")funcswift_sum(_v1:Int32,_v2:Int32)->Int32print(swift_sum(10,20))//30print(sum(10,20))//nXcode已经默认生成一个用于OC调用Swift的头文件，文件名格式是：{targetName}-OC调用Swiftimport@objcMembersclassCar:NSObjectimport@objcMembersclassCar:NSObject{varprice:Doublevarband:init(price:Double,band:String){self.price=priceself.band=}funcrun(){print(price,band,"run")}staticfuncrun(){print("Carrun")}}extensionCarfunctest(){print(price,band,"test")}n使用@objc修饰需 n使用@objcMembersp代表默认所有成员都 给OC（包括扩展中定义的成员p最终是否成 ，还需要考虑成员自身 级OC调用SwifttargetName}-nXcode会根据Swift代码生成对应的 ，写入{targetName}-Swift.h文@interfaceCar:NSObject@property(nonatomic)doubleprice;@property(nonatomic,copy)NSString*_Nonnull(nonnullinstancetype)initWithPrice:(double)priceband:(NSString*_Nonnull)band+(nonnullinstancetype)init+(nonnullinstancetype)newSWIFT_UNAVAILABLE_MSG("-initisunavailable");@interfaceCar(SWIFT_EXTENSION(备课OC调用SwiftOC#import#import"备课_Swift-Swift.h"intsum(inta,intb){Car*c=[[Caralloc]initWithPrice:10.5band:@"BMW"];c.band=@"Bently";c.price=[crun];//108.5Bentlyrun[ctest];//108.5Bentlytest[Carrun];//Carrunreturna+}OC调用Swiftn可以通过@objc重命名 给OC的符号名（类名、属性名、函数名等MJCar*c=[[MJCar*c=[[MJCaralloc]initWithPrice:10.5band:@"BMW"];=@"Bently";c.price=[cdrive];//108.5Bently[cexec:10v2:20];//108.5Bentlytest[MJCarrun];//Carrun@objcMembersclassCar:NSObject{varprice:Doublevarband:init(price:Double,band:String){self.price=priceself.band=}funcrun(){print(price,band,"run")}staticfuncrun(){print("Carrun")}}extensionCar{functest(){print(price,band,"test")}@objcMembers@objcMembers:NSObjectfunctest1(v1:Int){print("test1")functest2(v1:Int,v2:Int){print("test2(v1:v2:)")functest2(_v1:Double,_v2:Double){print("test2(_:_:)")}funcrun(){perform(#selector(test2as(Double,Double)->Void))}}nSwift中依然可以使用选择器，使用#selector(name)p必须是被@objcMembers或@objcnSwift的字符串类型String，跟OC的NSString，在API//var//varemptyStr1=varemptyStr2=varstr="123456"print(str.hasPrefix("123"))//trueprint(str.hasSuffix("456"))//varstr:String=拼接，jack_rose//重载运算符+strstr"_3"//重载运算符str+=//\()str=长度，9，1_2_3_4_5varvarstr=//str.insert("_",at://str.insert(contentsOf:"3_4",at:////str.insert(contentsOf:"888",at:str.index(before:"666",at:str.index(after:// str.insert(contentsOf: o",at:str.index(str.startIndex,offsetBy://str.remove(at:str.firstIndex(of: str.removeAll{$0=="6"}varrange=str.index(str.endIndex,offsetBy:-4)..<str.index(before: nString可以通过下标、prefix、suffix等截取子串，子串类型不是String，而是varstr=//varsubstr1=//varsubstr2=//varrange=str.startIndex..<str.index(str.startIndex,offsetBy:3)varsubstr3=str[range]//最初的String，1_2_3_4_5//Substring->Stringvarstr2=String(substr3)nSubstring和它的basenSubstring发生修改或者转为String时，会分配新的内 Stringforforcin"jackc是Character类型}varstr=c是Charactervarc=nBidirectionalCollectionpstartIndex、endIndex属性、indexpString、Arrayn ceableCollectionpappend、insert、removepString、ArraynDictionary、Set也有实现上述协议 的一些方法，只是并没有遵守上述协thethefirstquote"""twoquotes"""allthreequotes12341//缩进以结尾的3//缩进以结尾的3letstr=1234//如果要显示3引号，至少转义1letstr= thefirstquote\""" twoquotes\"\"" allthreequotes\"\"\"letstr="""3////以下2letstr1="Thesearethesame."letstr2="""Thesearethesame.StringnString与NSStringp如果你觉得String的API过于复杂难用，可以考虑将String转为varvarstr1:String="jack"varstr2:NSString=varstr3=str1asNSStringvarstr4=str2asString//varstr5=str3.substring(with:NSRange(location:0,length:2))npStringpNSString使用isEqual运算符（本质还是调用了isEqual方法⇌←⇌←⇌←⇌←protocolprotocolRunnable1:AnyObject{}protocolRunnable2:class{}@objcprotocolRunnable3{}n被@objc修饰的协议，还可 给OC去遵守实@objcprotocolRunnable{funcrun1()@objcprotocolRunnable{funcrun1()@objcoptionalfuncrun2()funcrun3()}classDog:Runnablefuncrun3()func}{print("Dog{print("Dog}}vard=d.run1()//d.run3()//n被@objcdynamic修饰的内容会具有动态性，比如调用 走runtime那一套流classclassDog:NSObject@objcdynamicfunctest1(){}functest2(){}}vard=Dog():NSObject@objcdynamicvarage:Int=varobserver:Observer=Observer()overrideinit(){forKeyPath:"age",options:.new,context:nil)}deinitforKeyPath:}}varp //observeValueOptional(20)p.age=20//observeValuep.setValue(25,forKey:nSwift支持KVC\KVOp属性所在的类 器最终继承自p用@objcdynamicclassclassObserver:NSObjectoverridefuncobserveValue(forKeyPathkeyPath:ofobject:change:[NSKeyValueChangeKey:Any]?,context:UnsafeMutableRawPointer?){print("observeValue",change?[.newKey]as}}:NSObject@objcdynamicvarage:Int=varobservation:NSKeyValueObservation?overrideinit(){observation=observe(\ .age,options:.new){ ,change)inprint(change.newValueas}}}varp //Optional(20)p.age=20//p.setValue(25,forKey:{privatestaticvarAGE_KEY:Void?varage:Int{get(objc_getAssociatedObject(self,&Self.AGE_KEY)as?Int)??}set}}}varpprint(p.age)//p.age=print(p.age)//关联对象（Associatedn在Swift中，classn默认情况，extension不可以增 属p借助关联对象，可以实现类似extension为class增 属性的效enumRenumRenumstringString{caseadd="添加"}enumimage:String{caselogo}enumsegue:String{caselogin_main}}letimg=UIImage(named:letbtn=UIButton(type:.custom)btn.setTitle("添加",for:.normal)performSegue(withIdentifier:"login_main",sender:letimg=letimg=letbtn=UIButton(type:.custom)btn.setTitle(R.string.add,for:.normal)performSegue(withIdentifier:R.segue.login_main,sender:extensionextensionUIImageconvenienceinit?(_name:R.image){self.init(named:name.rawValue)}}extensionUIViewControllerfuncperformSegue(withIdentifieridentifier:R.segue,sender:Any?){performSegue(withIdentifier:identifier.rawValue,sender:}}extensionUIButtonfuncsetTitle(_title:R.string,forstate:UIControl.State){setTitle(title.rawValue,for:state)}}letimgletimg=UIImage(named:letfont=UIFont(name:"Arial",size:/mac-cain13/R.swiftletimgletimg=letfont=enumRenumimagestaticvarlogo=UIImage(named:}enumfontstaticfuncarial(_size:CGFloat)->UIFont?{UIFont(name:"Arial",size:size)}}}publicpublictypealiasTask=()->publicstaticfuncasync(_task:}Task)publicstaticfuncasync(_task: _mainTask: Task)_async(task,}privatestaticfunc_async(_task:_mainTask:Task?=nil){letitem=DispatchWorkItem(block:task)DispatchQueue.global().async(execute:item)ifletmain=mainTaskitem.notify(queue:DispatchQueue.main,execute:}}publicstaticfuncdelay(_seconds:_block:@esca Task)->DispatchWorkItem{letitem=DispatchWorkItem(block:block)DispatchQueue.main.asyncAfter(deadline:DispatchTime.now()+seconds,execute:return}publicstaticfuncasyncDelay(_seconds:_task:@esca Task)->DispatchWorkItem{return_asyncDelay(seconds,task)}publicstaticfuncasyncDelay(_seconds:_task: _mainTask:@esca Task)->Dispatch