1 #import <Foundation/Foundation.h>
2 #import "Person.h"
3
4 int main(int argc, const char * argv[]) {
5 @autoreleasepool {
6 Person *person1 = [[Person alloc] initWithName:@"Mary" andAge:13 andGender:@"girl"];
7 Person *person2 = [[Person alloc] initWithName:@"Tom" andAge:16 andGender:@"boy"];
8 Person *person3 = [[Person alloc] initWithName:@"Linda" andAge:20 andGender:@"girl"];
9 Person *person4 = [[Person alloc] initWithName:@"Jerry" andAge:32 andGender:@"boy"];
10 Person *person5 = [[Person alloc] initWithName:@"Sam" andAge:24 andGender:@"boy"];
11
12 NSArray *personArr = @[person1, person2, person3, person4, person5];
13 #pragma mark 关系运算符
14 // 创建谓词,用于指定过滤条件 -- 年龄大于20
15 NSPredicate *predicate1 = [NSPredicate predicateWithFormat:@"age > 20"];
16 // 遍历数组
17 for (Person *person in personArr) {
18 // 判断person是否符合谓词里所定义的条件
19 if ([predicate1 evaluateWithObject:person]) {
20 NSLog(@"person = %@", person);
21 }
22 }
23 #pragma mark 快速筛选数组
24 // 过滤数组，找到符合条件的元素，存到数组中
25 NSArray *resultArr = [personArr filteredArrayUsingPredicate:predicate1];
26 NSLog(@" > %@", resultArr);
27
28 #pragma mark 逻辑运算符 and与 or或 not非
29 // 年龄大于20岁的女生
30 NSPredicate *predicate2 = [NSPredicate predicateWithFormat:@"age < 20 && gender = 'girl'"];
31 resultArr = [personArr filteredArrayUsingPredicate:predicate2];
32 NSLog(@"and%@", resultArr);
33
34 #pragma mark 范围运算符 between在...之间 in包含的关系
35 // 年龄在16到24之间的人，包含16和24
36 NSPredicate *predicate3 = [NSPredicate predicateWithFormat:@"age between {16, 24}"];
37 resultArr = [personArr filteredArrayUsingPredicate:predicate3];
38 NSLog(@"between%@", resultArr);
39
40 // 姓名是mary 和 tom的人
41 NSPredicate *predicate4 = [NSPredicate predicateWithFormat:@"name in {'Mary', 'Tom'}"];
42 resultArr = [personArr filteredArrayUsingPredicate:predicate4];
43 NSLog(@"in %@", resultArr);
44
45 #pragma mark 占位符 $
46 // NSPredicate *predicate5 = [NSPredicate predicateWithFormat:@"name = $Name"];
47 NSPredicate *predicate5 = [NSPredicate predicateWithFormat:@"age < $Age and gender = $Gender"];
48 NSDictionary *dictionary = [NSDictionary dictionaryWithObjectsAndKeys:@"Linda", @"Name", @20, @"Age", @"girl", @"Gender" ,nil];
49 predicate5 = [predicate5 predicateWithSubstitutionVariables:dictionary];
50 resultArr = [personArr filteredArrayUsingPredicate:predicate5];
51 NSLog(@"占位符%@", resultArr);
52
53 #pragma mark 字符串运算符
54 NSArray *strArray = @[@"Hello", @"world", @"hey", @"kitty"];
55 // 以字符串he开头，忽略大小写
56 NSPredicate *predicate6 = [NSPredicate predicateWithFormat:@"self beginswith[c] 'he'"];
57 resultArr = [strArray filteredArrayUsingPredicate:predicate6];
58 NSLog(@"beginswith%@", resultArr);
59 // 包含o的
60 NSPredicate *predicate7 = [NSPredicate predicateWithFormat:@"self contains 'o'"];
61 resultArr = [strArray filteredArrayUsingPredicate:predicate7];
62 NSLog(@"contains%@", resultArr);
63
64 #pragma mark LIKE运算符
65 NSPredicate *predicate8 = [NSPredicate predicateWithFormat:@"self like[c] 'h*'"];
66 resultArr = [strArray filteredArrayUsingPredicate:predicate8];
67 NSLog(@"like %@", resultArr);
68
69 #pragma mark 正则表达式
70 // 验证邮箱
71 NSString *str = @"^\w+([-+.]\w+)*@\w+([-.]\w+)*\.\w+([-.]\w+)*$";
72 NSPredicate *predicate9 = [NSPredicate predicateWithFormat:@"self matches %@", str];
73 if ([predicate9 evaluateWithObject:@"http://www.ba"]) {
74 NSLog(@"正确");
75 } else {
76 NSLog(@"错误");
77 }
78 }
79 return 0;
80 }