OC嶄議汽箭

汽箭?酒汽議囂冱古凄?祥頁率匯議匯倖糞箭?匆祥頁率匯議匯倖斤嵆?寄社脅斤揖匯倖斤嵆序佩荷恬。

壓Foundation崇尺嶄?載謹議窃嶄脅喘欺阻汽箭宸嶽園殻庁塀?万頁侃尖方象慌峴議恷械喘議匯嶽圭隈。

汽箭議尖盾

酒汽議尖盾?祥頁壓蝕窟狛殻嶄?嗤扮氏俶勣壓音揖議仇圭斤揖匯翠坪贋議方象序佩荷恬?遇斤噐OC栖讐?宸翠坪贋吏吏旗燕議頁匯倖斤嵆議方象。

侭參?竃阻宸劔匯嶽一隈?祥頁辛參宥狛匯倖窃圭隈岷俊卦指匯倖云窃議斤嵆(駅倬頁窃圭隈?咀葎泌惚頁斤嵆圭隈?壓距喘議扮昨珊勣蕗苧匯倖乎窃議斤嵆旺斤凪兜兵晒?遇宸倖斤嵆云附短嗤糞縞恬喘?涙絞議媼喘阻坪贋腎寂)?遇拝隠屬宸倖斤嵆峪瓜蛍塘匯肝坪贋腎寂(宸劔嘉嬬隠屬宥狛宸倖斤嵆喟垓嬬校斤椎翠坪贋腎寂序佩荷恬)?宥狛宸嶽圭塀?壓屁倖垢殻嶄?低峪勣?響函宸翠坪贋嶄議方象?祥辛參宥狛距喘乎窃議窃圭隈卦指宸倖率匯議斤嵆。

汽箭議糞箭

宸倖箭徨庁亭議頁曾倖繁ZhangSan才LiSi栽怩阻匯曽概?宥狛芝村耽倖繁蝕概議扮寂?恷朔由柴竃宸曽概悳慌怒議弌扮方。

幹秀匯倖垢殻?箭泌?Share?
幹秀曾倖窃?匯倖頁Person窃?匯倖頁Car窃?

喇噐曾倖繁慌喘匯曽概?侭參Car窃嶄嗤匯倖汽箭?厘断枠栖心Car窃議旗鷹糞孖?

Car.h嶄議旗鷹?

#import <Foundation/Foundation.h>
@interface Car : NSObject
@property (nonatomic,assign)int driveHours;
+(instancetype)car;
@end

Car.m嶄議旗鷹?

#import "Car.h"
static Car * car=nil;
@implementation Car
+(instancetype)car{
 if (car==nil) {
 car=[[Car alloc] init];
 }
 return car;
}
@end

蛍盾匯和Car窃嶄議旗鷹?
Car.h嶄蕗苧阻匯倖射村悳扮寂議奉來才匯倖窃圭隈。

購囚議旗鷹壓Car.m嶄?遍枠厘断蕗苧阻匯倖畠蕉云窃議斤嵆?宸倖斤嵆駅倬験腎峙??

static購囚忖壓宸戦議恬喘頁?聞宸倖斤嵆峪蛍塘匯肝坪贋(static珊嗤載謹蒙來)。

壓car議窃圭隈嶄?厘断遍枠登僅car斤嵆頁倦頁腎峙?泌惚頁腎峙?厘断嘉公万兜兵晒。倦夸?傍苧万厮将瓜聞喘狛阻?祥岷俊卦指?音序秘if囂鞘。

和中?厘断栖心匯和Person窃嶄議旗鷹糞孖?
Person.h議旗鷹?

#import <Foundation/Foundation.h>
#import "Car.h"
@interface Person : NSObject
@property (nonatomic,copy)NSString * name;
@property (nonatomic,strong)Car * car;
-(void)displayWithDriveHours:(int)hours;
@end

Person.m嶄議旗鷹?

#import "Person.h"
@implementation Person
-(instancetype)init{
if (self=[super init]) {
 self.car=[Car car];//幹秀斤嵆議car奉來糞縞貧祥頁Car窃議椎倖率匯議糞箭。
 self.name=nil;
 }
 return self;
}
-(void)displayWithDriveHours:(int)hours{
 self.car.driveHours+=hours;
}
@end

main.m猟周嶄旗鷹?

import <Foundation/Foundation.h>
#import "Person.h"
int main(int argc, const char * argv[]) {
 Person * ZhangSan=[[Person alloc] init];
 
 Person * LiSi=[[Person alloc] init];
 
 [LiSi displayWithDriveHours:5];
 
 [ZhangSan displayWithDriveHours:10];
 
 [LiSi displayWithDriveHours:3];
 Car * car=[Car car];
 NSLog(@"The allHours are %d",car.driveHours);
 return 0;
}

補竃潤惚?The allHours are 18

壓main.m嶄?涙胎頁陳倖斤嵆距喘宸倖窃圭隈?卦指議脅頁屢揖議斤嵆?斤揖匯翠坪贋方象恂荷恬。宸祥頁汽箭議糞縞恬喘。

厘断厮将僥楼阻載謹圭隈勧弓方象阻?耽嶽圭塀嗤万蒙嗤議單米?宸倖俶勣壓音僅仇糞樹嶄?悶氏万断?壓癖輝議仇圭聞喘癖輝議勧弓圭隈。

汽箭?冢鯉栖傍哘乎頁垢殻嶄俶勣慌峴方象扮嘉聞喘?泌惚喘汽箭峪頁肇勧弓方象?椎祥嗤泣寄可弌喘阻。

OC嶄議汽箭

云嫋娼瞳縮殻