谓词的各种用法：
直接上代码，看各种情况：
w01.png
1.viewController
#import "ViewController.h"
#import "Person.h"
@interface ViewController ()
@end
@implementation ViewController
- (void)viewDidLoad {
[super viewDidLoad];
// Do any additional setup after loading the view, typically from a nib.
NSMutableArray *mutableArr = [NSMutableArray arrayWithCapacity:0];
Person *person1 = [[Person alloc] initWithName:@"wgj001" age:10];
Person *person2 = [[Person alloc] initWithName:@"wgj002" age:11];
Person *person3 = [[Person alloc] initWithName:@"wgj003" age:12];
[mutableArr addObject:person1];
[mutableArr addObject:person2];
[mutableArr addObject:person3];
//比较运算符
// NSString *str1 = @"我们";
// NSPredicate *predicate1 = [NSPredicate predicateWithFormat:@"SELF = %@",@"我们"];
// if ([predicate1 evaluateWithObject:str1]) {
// NSLog(@"testString:%@", str1);
// }
//
// NSNumber *num1 = @123;
// NSPredicate *predicate2 = [NSPredicate predicateWithFormat:@"SELF BETWEEN {123, 124}"];
// if ([predicate2 evaluateWithObject:num1]) {
// NSLog(@"testString:%@", num1);
// } else {
// NSLog(@"不符合条件");
// }
//逻辑运算符 - 选出数组中特定的对象
// NSArray *testArray = @[@1, @2, @3, @4, @5, @6];
// NSPredicate *predicate = [NSPredicate predicateWithFormat:@"SELF > 2 && SELF < 5"];
// NSArray *filterArray = [testArray filteredArrayUsingPredicate:predicate];
// NSLog(@"filterArray:%@", filterArray);
// NSArray *testArray = @[@"a", @"2", @"3", @"m", @"B", @"6"];
// NSString *regular = @"^[a-z]+$";
// NSString *regular2 = @"^[0-9]+$";
// NSPredicate *predicate = [NSPredicate predicateWithFormat:@"SELF MATCHES %@ || SELF MATCHES %@",regular,regular2];
// NSArray *filterArray = [testArray filteredArrayUsingPredicate:predicate];
// NSLog(@"filterArray:%@", filterArray);
//字符串比较运算符
// NSArray *testArray = @[@"acMbi",@"itmb",@"sshh",@"ih"];
// NSPredicate *predicate = [NSPredicate predicateWithFormat:@"SELF BEGINSWITH %@ || SELF ENDSWITH %@ || SELF CONTAINS %@" ,@"it",@"i",@"hh"];//开头、结尾、包含
// NSArray *filterArray = [testArray filteredArrayUsingPredicate:predicate];
// NSLog(@"filterArray:%@", filterArray);
// MATCHES：检查某个字符串是否匹配指定的正则表达式
// NSString *reg = @"^[a-z]+$";
// NSPredicate *predicate = [NSPredicate predicateWithFormat:@"SELF MATCHES %@",reg];
// if ([predicate evaluateWithObject:@"name"]) {
// NSLog(@"wgjYES");
// }else{
// NSLog(@"wgjNO");
// }
// NSString *targetStr = @"(.*/page/main.do.*)";//|(.*/activity/main\\.do.*)|(.*/gift/.*\\.do.*)|(.*/alipayapi.jsp.*)|(.*/login.jsp.*)|(.*/register.jsp.*)|(.*/searh.jsp.*)|(.*/questionaire/.*\\.do.*)|(.*/eticket/.*\\.do.*)
//
// NSPredicate *predicate = [NSPredicate predicateWithFormat:@"SELF MATCHES %@",targetStr] ;
// if ([predicate evaluateWithObject:@"wgj/page/main.do"]) {
// NSLog(@"Match");
// }else{
// NSLog(@"NotMatch");
// }
//LIKE：检查某个字符串是否匹配指定的字符串模板;
// NSPredicate *predicate = [NSPredicate predicateWithFormat:@"SELF LIKE '?am*'"];
// if ([predicate evaluateWithObject:@"namewgj"]) {//"?"标示一个，“*”标示多个
// NSLog(@"wgjYES");
// }else{
// NSLog(@"wgjNO");
// }
// NSPredicate *predicate = [NSPredicate predicateWithFormat:@"name LIKE '*wgj*'"];
// if ([predicate evaluateWithObject:mutableArr[0]]) {//"?"标示一个，“*”标示多个
// NSLog(@"wgjYES");
// }else{
// NSLog(@"wgjNO");
// }
// NSPredicate *predicate = [NSPredicate predicateWithFormat:@"name LIKE '*wgj*'"];
// NSLog(@"%@", [mutableArr filteredArrayUsingPredicate:predicate]);
//集合运算符
/*
* ANY，SOME：指定下列表达式中的任意元素。比如，ANY children.age < 18。
* ALL：指定下列表达式中的所有元素。比如，ALL children.age < 18。
* NONE：指定下列表达式中没有的元素。比如，NONE children.age < 18。它在逻辑上等于NOT (ANY ...)。
* IN：等于SQL的IN操作，左边的表达必须出现在右边指定的集合中。比如，name IN { 'Ben', 'Melissa', 'Nick' }。
*/
// NSArray *filterArray = @[@"ab", @"abc"];
// NSArray *array = @[@"a", @"ab", @"abc", @"abcd"];
// NSPredicate *predicate = [NSPredicate predicateWithFormat:@"NOT (SELF IN %@)", filterArray];
// NSLog(@"%@", [array filteredArrayUsingPredicate:predicate]);
// NSArray *filterArray = @[@"ab", @"abc"];
// NSArray *array = @[@"a", @"ab", @"abc", @"abcd"];
// NSPredicate *predicate = [NSPredicate predicateWithFormat:@"NOT (SELF IN %@)", filterArray];（NOT可去掉）
// NSLog(@"%@", [array filteredArrayUsingPredicate:predicate]);
// NSPredicate *predicate = [NSPredicate predicateWithFormat:@"name in {'wgj001','zhang4'}"];
// NSLog(@"%@", [mutableArr filteredArrayUsingPredicate:predicate]);
// NSPredicate *predicate = [NSPredicate predicateWithFormat:@"NONE age < 10"];
// BOOL isAll = [predicate evaluateWithObject: mutableArr];
// NSLog(@"wgj:%ld",isAll);
// NSPredicate *predicate = [NSPredicate predicateWithFormat:@"SOME age < 11"];
// BOOL isAll = [predicate evaluateWithObject: mutableArr];
// NSLog(@"wgj:%ld",isAll);
//对电话号码的刷选判断
// NSString *regex = @"^[1][3-8]\\d{9}$";
// NSPredicate *pred = [NSPredicate predicateWithFormat:@"SELF MATCHES %@", regex];
// NSLog(@"wgjwgj:%ld",[pred evaluateWithObject:@"13367876514"]);
//=============语句=================
// 过滤对象是数组：使用- (void)filterUsingPredicate:(NSPredicate *)predicate; 针对可变数组进行过滤，过滤掉可变数组中不符合条件的。-
// (NSArray *)filteredArrayUsingPredicate:(NSPredicate *)predicate; 针对不可变数组进行过滤，将符合条件的元素组成一个新数组进行返回
// 对单个对象进行判断过滤使用：- (BOOL)evaluateWithObject:(id)object; 向谓词对象发送该方法，参数是过滤的对象。常见于和正则表达式配合使用。
}
- (void)didReceiveMemoryWarning {
[super didReceiveMemoryWarning];
// Dispose of any resources that can be recreated.
}
@end
2. Person文件
#import <Foundation/Foundation.h>
@interface Person : NSObject
@property (nonatomic, strong) NSString *name;
@property (nonatomic, assign) NSInteger age;
- (instancetype)initWithName:(NSString *)name age:(NSInteger)age;
@end
#import "Person.h"
@implementation Person
- (instancetype)initWithName:(NSString *)name age:(NSInteger)age
{
self = [super init];
if (self) {
_name = name;
_age = age;
}
return self;
}
@end
