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reference from :http://mobile.51cto.com/hot-434804.htm
1.构建Person类
Person.h
@interface Person : NSObject @property (nonatomic, copy) NSString *name; @property (nonatomic, copy) NSString *surname; @property (nonatomic, strong) NSDate *dateOfBirth; @end
2. 初始化ObjSort对象排序功能,包含一个NSArray数组,数组元素为自定义Person
ObjSort.h
/** * 对NSArray自定义对象排序类 */ @interface ObjSort : NSObject -(void)personsSort_NSComparator;//NSComparator比较器 @end
ObjSort.m
@interface ObjSort() @property (nonatomic, strong) NSMutableArray *personObjs;//存储了若干个Person类对象的数组 @end @implementation ObjSort /** * 初始化对象 * 初始化NSMutableArray数组personObjs的初始内容, 包装Person类对象 */ -(instancetype)init{ self = [super init]; if (self == nil) { return nil; } NSDateFormatter *formatter = [[NSDateFormatter alloc] init]; [formatter setDateFormat:@"dd/MM/yyyy"]; Person *person[5]; for(int i=0; i<5; i++){ person[i] = [[Person alloc] init]; } person[0].name = @"Smith"; person[0].surname = @"John"; person[0].dateOfBirth = [formatter dateFromString:@"03/01/1984"]; person[1].name = @"Andersen"; person[1].surname = @"Jane"; person[1].dateOfBirth = [formatter dateFromString:@"16/03/1979"]; person[2].name = @"Clark"; person[2].surname = @"Anne"; person[2].dateOfBirth = [formatter dateFromString:@"13/09/1995"]; person[3].name = @"Smith"; person[3].surname = @"David"; person[3].dateOfBirth = [formatter dateFromString:@"19/07/1981"]; person[4].name = @"Johnson"; person[4].surname = @"Rose"; person[4].dateOfBirth = [formatter dateFromString:@"22/02/1989"]; if (_personObjs==nil) { _personObjs = [[NSMutableArray alloc] initWithCapacity:5]; } for (int i=0; i<5; i++) { [_personObjs addObject:person[i]]; } [self showPersons:_personObjs]; return self; } /** * 日志打印输出当前NSArray内容 */ -(void)showPersons:(NSArray *)array{ Person *person; if (_personObjs == nil) { NSLog(@"nil"); } for (int i =0; i< [array count]; i++) { person = [array objectAtIndex:i]; if ([person isKindOfClass:[Person class]]) { NSLog(@"---Person %d---", i); NSLog(@"Name: %@", person.name); NSLog(@"Surname: %@", person.surname); NSLog(@"DateOfBirth: %@", person.dateOfBirth); } else{ NSLog(@"Object in personObjs is not Person class object."); } }
NSLog(@"All person print over.\n\n"); }
方法一:NSComparator block + NSArray的 sortedArrayUsingSelector
在ObjSort中实现方法personsSort_NSComparator
/** * 采用NSComparator比较的排序方法 */ -(void)personsSort_NSComparator{ NSComparator sortBlock = ^(Person *p1 , Person *p2){ NSComparisonResult r1 = [p1.name compare:p2.name]; if(r1 != NSOrderedSame){ return r1; }else { NSComparisonResult r2 = [p1.surname compare:p2.surname]; if (r2 != NSOrderedSame) return r2; else return [p1.dateOfBirth compare:p2.dateOfBirth]; } }; NSArray *personList = [self.personObjs sortedArrayUsingComparator:sortBlock]; NSArray *personList = [self.personObjs sortedArrayUsingSelector:@selector(compare:)]; [self showPersons:personList]; }
方法二:利用对象的自定义方法compare:
Person.m中添加
-(NSComparisonResult)compare:(Person *)otherPerson{ NSComparisonResult r1 = [self.name compare:otherPerson.name]; if(r1 != NSOrderedSame){ return r1; }else { NSComparisonResult r2 = [self.surname compare:otherPerson.surname]; if (r2 != NSOrderedSame) return r2; else return [self.dateOfBirth compare:otherPerson.dateOfBirth]; } return [self.name compare:otherPerson.name]; }
ObjSort.m中添加
/** * 采用自定义对象自定义函数compare进行NSArray排序 */ -(void)personsSort_CustomCompare{ NSArray *personList = [self.personObjs sortedArrayUsingSelector:@selector(compare:)]; [self showPersons:personList]; }
在ObjSort.h中添加响应的接口
/** * 对NSArray自定义对象排序类 */ @interface ObjSort : NSObject -(void)personsSort_NSComparator;//NSComparator比较器 -(void)personsSort_CustomCompare;//对象自定义比较方法Compare @end
最后,在main.m(排序调用处)添加
ObjSort *objSort = [[ObjSort alloc] init]; [objSort personsSort_NSComparator];
方法一结果
---Person 0--- Name: Smith Surname: John DateOfBirth: 1984-01-02 16:00:00 +0000 ---Person 1--- Name: Andersen Surname: Jane DateOfBirth: 1979-03-15 16:00:00 +0000 ---Person 2--- Name: Clark Surname: Anne DateOfBirth: 1995-09-12 16:00:00 +0000 ---Person 3--- Name: Smith Surname: David DateOfBirth: 1981-07-18 16:00:00 +0000 ---Person 4--- Name: Johnson Surname: Rose DateOfBirth: 1989-02-21 16:00:00 +0000 All person print over. ---Person 0--- Name: Andersen Surname: Jane DateOfBirth: 1979-03-15 16:00:00 +0000 ---Person 1--- Name: Clark Surname: Anne DateOfBirth: 1995-09-12 16:00:00 +0000 ---Person 2--- Name: Johnson Surname: Rose DateOfBirth: 1989-02-21 16:00:00 +0000 ---Person 3--- Name: Smith Surname: David DateOfBirth: 1981-07-18 16:00:00 +0000 ---Person 4--- Name: Smith Surname: John DateOfBirth: 1984-01-02 16:00:00 +0000 All person print over.
方法二结果
---Person 0--- Name: Smith Surname: John DateOfBirth: 1984-01-02 16:00:00 +0000 ---Person 1--- Name: Andersen Surname: Jane DateOfBirth: 1979-03-15 16:00:00 +0000 ---Person 2--- Name: Clark Surname: Anne DateOfBirth: 1995-09-12 16:00:00 +0000 ---Person 3--- Name: Smith Surname: David DateOfBirth: 1981-07-18 16:00:00 +0000 ---Person 4--- Name: Johnson Surname: Rose DateOfBirth: 1989-02-21 16:00:00 +0000 All person print over. ---Person 0--- Name: Andersen Surname: Jane DateOfBirth: 1979-03-15 16:00:00 +0000 ---Person 1--- Name: Clark Surname: Anne DateOfBirth: 1995-09-12 16:00:00 +0000 ---Person 2--- Name: Johnson Surname: Rose DateOfBirth: 1989-02-21 16:00:00 +0000 ---Person 3--- Name: Smith Surname: David DateOfBirth: 1981-07-18 16:00:00 +0000 ---Person 4--- Name: Smith Surname: John DateOfBirth: 1984-01-02 16:00:00 +0000 All person print over.
NSArary自定义对象排序 NSComparator, compare
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原文地址:http://www.cnblogs.com/fortunely/p/4709598.html