1、常用創(chuàng)建方式

NSPredicate *predicate = [NSPredicate predicateWithFormat:@""];

2、Format：的格式

2.1 比較運(yùn)算符 >,<,==,>=,<=,!=

// 說明：Person類要自己寫，這里就不貼代碼了

 Person *p1 = [[Person alloc] initWithName:@"test1" AndAge:12];

Person *p2 = [[Person alloc] initWithName:@"test2" AndAge:23];

Person *p3 = [[Person alloc] initWithName:@"test3" AndAge:101];

Person *p4 = [[Person alloc] initWithName:@"test4" AndAge:120];

NSArray *arr = @[p1,p2,p3,p4];
NSPredicate *predicate = [NSPredicate predicateWithFormat:@"age>100&&name=='test4'"];
// 注意這個(gè)語法里面字符串要用單引號(hào)

NSArray *result = [arr filteredArrayUsingPredicate:predicate];
// 打印輸出結(jié)果
NSLog(@"%@",result);

2.2 范圍運(yùn)算符，in(則表示在后面的{}中是否包含)，between(在某個(gè)范圍內(nèi)，如：age between{15,25}等價(jià)于 15<=age<=25)

    NSPredicate *predicate = [NSPredicate predicateWithFormat:@"age between {15,25}"];
或者
NSPredicate *predicate = [NSPredicate predicateWithFormat:@"name in {'test1','test2'}"];

2.3 對(duì)象本身self 如@"self == 'apple'"（也可以是NSNumber）

 NSArray *arr = @[@"ss",@"dddd",@"apple"];
NSPredicate *predicate = [NSPredicate predicateWithFormat:@"self == 'apple'"];
// 注意這個(gè)語法里面字符串要用單引號(hào)

NSArray *result = [arr filteredArrayUsingPredicate:predicate];
// 打印輸出結(jié)果：apple

2.4 字符串相關(guān)

：BEGINSWITH、ENDSWITH、CONTAINS
例：@"name CONTAINS[cd] 'ang'" //包含某個(gè)字符串
@"name BEGINSWITH[c] 'sh'" //以某個(gè)字符串開頭
@"name ENDSWITH[d] 'ang'" //以某個(gè)字符串結(jié)束

NSArray *arr = @[@"yangjie",@"zhangsan",@"lisi"];
NSPredicate *predicate = [NSPredicate predicateWithFormat:@"self contains[cd] 'ng'"];

 NSPredicate *predicate = [NSPredicate predicateWithFormat:@"self beginswith[c] 'y'"];
NSPredicate *predicate = [NSPredicate predicateWithFormat:@"self endswith[d] 'i'"];


// 注意這個(gè)語法里面字符串要用單引號(hào)

NSArray *result = [arr filteredArrayUsingPredicate:predicate];
// 打印輸出結(jié)果
NSLog(@"%@",result);

2.5通配符：LIKE

例：@"name LIKE[cd] 'er'" //代表通配符,Like也接受[cd].
@"name LIKE[cd] '???er'"

NSArray *arr = @[@"yangjie",@"zhangsan",@"lisi",@"ang",@"tangddd",@"fangxxx"];
NSPredicate *predicate = [NSPredicate predicateWithFormat:@"self like[cd] 'ang*'"];
// 注意這個(gè)語法里面字符串要用單引號(hào)

NSArray *result = [arr filteredArrayUsingPredicate:predicate];
// 打印輸出結(jié)果
NSLog(@"%@",result);

2.6正則表達(dá)式：MATCHES

例：NSString *regex = @"^A.+e$"; //以A開頭，e結(jié)尾
@"name MATCHES %@",regex