Common uses of the Objective-c:nsvalue class

Special types of wrapper classes: arrays, structs (internal OC, custom), pointers

1 //2 //main.m3 //05-nsvalue4 //5 //Created by Ma C on 15/8/17.6 //Copyright (c) 2015 BJSXT. All rights reserved.7 //8 9 #import<Foundation/Foundation.h>Tentypedefstruct One { A     Char*name; -     intAge ; -     Chargender; the }student; -  - intMainintargcConst Char*argv[]) - { + @autoreleasepool -     { +         //nsvalue Test A         //1. Pointers at         intnum =Ten; -         int*p = &num; -Nsvalue *value1 =[Nsvalue valuewithpointer:p]; -         int*P2 = (int*) [value1 Pointervalue]; -NSLog (@"num =%d",*(p2)); -          in         //2. Arrays -         intarr[5] = {1,2,3,4,5}; toNsvalue *value2 =[Nsvalue Valuewithpointer:arr]; +         int*P3 = (int*) [value2 Pointervalue]; -          for(intI=0; i<5; i++) the         { *NSLog (@"%d", P3[i]); $         }Panax Notoginseng          -         //structure commonly used in 3.Foundation: Nsrange\nsrect\nssize\nspoint theNsrange range = Nsmakerange (0,5); +Nsvalue *value3 =[Nsvalue Valuewithrange:range]; ANsrange Range2 =[Value3 Rangevalue]; theNSLog (@"%@", Nsstringfromrange (Range2)); +          -Nsrect rect = Nsmakerect (0,0, -, -); $Nsvalue *value4 =[Nsvalue Valuewithrect:rect]; $Nsrect Rect2 =[Value4 Rectvalue]; -          -NSLog (@"%@", Nsstringfromrect (Rect2)); the          -         Wuyi         //4. Custom Structure theStudent stu = {"Tom", -,'M'}; -Nsvalue *value5 = [Nsvalue valuewithbytes:&Stu Objctype: @encode (Student)]; WuNSLog (@"%s", @encode (Student)); -          About Student stu2; $[Value5 getvalue:&STU2]; -NSLog (@"name =%s,age =%i,gender =%c", Stu2.name,stu2.age,stu2.gender); -     } -     return 0; A}

Common uses of the Objective-c:nsvalue class