OC岻僚簡

低頁倦囑欺狛宸劔議是雌?箭泌?旋喘念中僥楼議岑紛貫plist猟周嶄資函欺匯倖方怏?徽頁宸倖方怏嶄嗤乂方象低音?勣?峪?隠藻斤低嗤喘議方象?椎担乎奕担恂椿?

厘断辛嬬氏?欺載謹嶽盾畳一隈?箭泌匯倖匯倖薬竃栖?斤噐殻會埀議厘断栖傍?椎祥湊low阻?厘断俶勣幹秀匯倖圭隈繍厘断議方象薬僉竃栖。

OC議蝕窟宀断匆?欺阻宸倖諒籾?侭參葎阻戻互厘断議蝕窟丼楕?公厘断戻工阻匯倖廨壇哘斤宸嶽彜趨議窃——NSPredicate?嶄猟鍬咎?僚簡。

糞縞貧?僚簡祥崧頁匯倖標徨(狛陀匂)?逸廁厘断繍俶勣議方象梓孚匯協議訳周薬僉竃栖。侭參云准繍律汎NSPredicate栖初府匯和奕劔壓匯均方象嶄資函欺?勣議方象。

遍枠?枠栖僥楼匯和泌採幹秀僚簡?宥狛臥心NSPredicate.h俊笥嶄議圭隈?厘断辛參孀欺宸倖圭隈?
+(NSPredicate*)predicateWithFormat:(NSString*)predicateFormat,...;

遍枠?宸倖頁匯倖窃圭隈?万卦指議頁匯倖NSPredicate窃議斤嵆?圭隈嶄藻公厘断議頁匯倖忖憲堪?宸倖忖憲堪喘栖野亟狛陀訳周。狛陀訳周議慕亟和中峪初府叱嶽械喘議?
SELE?旗燕耽倖方象云附
=、==?頁屢揖議?脅頁吉噐議吭房。
BETWEEN?寡喘?燕器塀 BETWEEN{和尫?貧尫}議鯉塀
AND、&&、OR、NOT
BEGINSWITH?殊臥蝶倖忖憲堪頁倦參峺協議忖憲堪蝕遊?泌?BEGINSWITH’a’
CONTAINS?殊臥頁倦淫根峺協議忖憲堪。
LIKE?喘噐標僉扮脅謄塘峺協議忖憲堪鯉塀?泌?name LIKE ‘*ac*’燕幣name忖憲堪嶄頁倦嗤ac忖憲堪。

宥狛貧中議圭隈參式歌方議初府?厘断辛參煤防幹秀匯倖僚簡?椎担奕担聞喘幹秀挫議僚簡椿?
壓NSPredicate窃嶄?珊辛參心欺宸担叱倖圭隈?
-(NSArray<ObjectType>*)filteredArrayUsingPredicate:(NSPredicate *)predicate;
貫兆忖貧祥岑祇喘噐狛陀NSArray議。

-(void)filterUsingPredicate:(NSPredicate*)predicate;//喘噐狛陀NSMutableArray方怏議

-(NSSet<ObjectType>*)filteredSetUsingPredicate:(NSPredicate *)predicate;//喘噐狛陀鹿栽(NSSet?鹿栽?才方怏匯劔?脅頁贋刈方怏議圭隈?曝艶祥頁鹿栽嶄圷殆札呟?聞喘議仇圭音謹?才NSArray式凪窃貌?掲械酒汽?寄社徭僥?宸戦音壓狛謹盾瞥。)

宥狛宸乂圭隈?厘断辛參煤防仇誼欺厘断?勣議方象。公寄社匯倖箭徨?
遍枠幹秀匯倖OC垢殻?壓垢殻嶄幹秀匯倖Person窃?
person.h嶄議旗鷹?

#import <Foundation/Foundation.h>
@interface Person : NSObject
@property (nonatomic,copy)NSString * name;
@property (nonatomic,assign)int age;
+(instancetype)personWithName:(NSString *)name age:(int)age;
@end

person.m嶄議旗鷹?

#import "Person.h"
@implementation Person
+(instancetype)personWithName:(NSString *)name age:(int)age{
 Person * person=[[Person alloc] init];
 person.name=name;
 person.age=age;
 return person;
}
@end

main.m猟周嶄議旗鷹?

#import <Foundation/Foundation.h>
#import "Person.h"
int main(int argc, const char * argv[]) {
 NSArray * array=[NSArray arrayWithObjects:
 [Person personWithName:@"ZhangSan" age:10],
 [Person personWithName:@"LiSi" age:15],
 [Person personWithName:@"WangWu" age:20],
 [Person personWithName:@"WangLiu" age:25],
 [Person personWithName:@"LiWu" age:30],
 [Person personWithName:@"ZhangSi" age:35], nil];
 
 NSPredicate * predicate=[NSPredicate predicateWithFormat:@"age>20"];
 NSArray * myArray=[array filteredArrayUsingPredicate:predicate];
 for (Person * person in myArray) {
 NSLog(@"age>20 :%@",person.name);
 }
 return 0;
}

補竃潤惚?age>20 :WangLiu
age>20 :LiWu
age>20 :ZhangSi
(廣吭?壓恷朔補竃議扮昨?泌惚寡喘NSLog議圭隈?補竃議頁耽倖斤嵆侭媼喘議坪贋遍仇峽?遇音頁醤悶議方象。寄社辛參貧利朴沫購噐嶷亟NSLog圭隈議旗鷹?喇噐音奉噐OC議岑紛泣?咀緩云猟嶄音初府)。

宥狛斤僚簡議僥楼?低頁倦心竃聞喘僚簡議益極?宥狛僚簡標僉議送殻?厘断辛參心竃?僚簡狛陀議頁匯乂醤嗤慌來議方象?泌惚頁墫岱短嗤号舵議方象?厘断泌惚聞喘僚簡?郡遇氏奐紗旗鷹楚。

侭參?壓糞縞園殻狛殻嶄?勣功象醤悶議桟廠?栽尖仇僉夲糞孖仇圭塀。

OC岻僚簡

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