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//
// ViewController.m
// NSRegularExpressionAndNSPredicate
//
// Created by FrankLiu on 16/3/11.
// Copyright © 2016年 FrankLiu. All rights reserved.
//
#import "ViewController.h"
#import "Info.h"
#import "Address.h"
#import "Teacher.h"
@interface ViewController ()
@end
@implementation ViewController
- (void)viewDidLoad {
[super viewDidLoad];
// 使用正则表达式
[self useRegularExpression];
// 使用谓词
[self usePredicate];
}
- (void)useRegularExpression {
NSString *string = @"46.5";
NSError *error = NULL;
// 创建正则表达式(例子中为">= 5 <= 50的整数")
NSRegularExpression *regex = [NSRegularExpression regularExpressionWithPattern:@"^[1-4]\\d$|^[5-9]$|^50$"
options:NSRegularExpressionAnchorsMatchLines
error:&error];
// 匹配数
NSUInteger numberOfMatches = [regex numberOfMatchesInString:string
options:NSMatchingReportProgress
range:NSMakeRange(0, [string length])];
NSLog(@"Match numbers = %lu",(unsigned long)numberOfMatches);
// 匹配范围
NSArray *resultArray = [regex matchesInString:string
options:NSMatchingReportProgress
range:NSMakeRange(0, [string length])];
for (NSTextCheckingResult *match in resultArray) {
NSRange matchRange = [match range];
NSLog(@"Match string = %@",[string substringWithRange:matchRange]);
}
}
- (void)usePredicate {
//初始化数据
Teacher *teacher1 = [[Teacher alloc] init];
teacher1.m_info.m_classNum = @"11班";
teacher1.m_address.m_detailAddress = @"海淀区";
teacher1.m_name = @"L.D.S.";
teacher1.m_age = 11;
Teacher *teacher2 = [[Teacher alloc] init];
teacher2.m_info.m_classNum = @"12班";
teacher2.m_address.m_detailAddress = @"立水桥";
teacher2.m_name = @"P.K.";
teacher2.m_age = 20;
Teacher *teacher3 = [[Teacher alloc] init];
teacher3.m_info.m_classNum = @"11班";
teacher3.m_address.m_detailAddress = @"万盛路";
teacher3.m_name = @"Y.X.";
teacher3.m_age = 22;
NSMutableArray *teachers =
[[NSMutableArray alloc] initWithObjects:teacher1, teacher2, teacher3, nil];
// [1] 比较操作 (>,<,>=,<=,=)
NSPredicate *predicate1 = [NSPredicate predicateWithFormat:@"m_age > 15"];
NSArray *resultArray1 = [teachers filteredArrayUsingPredicate:predicate1];
for (Teacher *tmp in resultArray1) {
NSLog(@"[1] Age > 15 match teacher = %@",tmp.m_name);
}
// [2] 字符串常规操作 (beginswith,endswith,contains)
NSPredicate *predicate2 = [NSPredicate predicateWithFormat:@"m_name beginswith[cd] 'L'"];
NSArray *resultArray2 = [teachers filteredArrayUsingPredicate:predicate2];
for (Teacher *tmp in resultArray2) {
NSLog(@"[2] Name beginswith[cd] 'L' match teacher = %@",tmp.m_name);
}
// [3] 范围 (between,in)
NSPredicate *predicate3 = [NSPredicate predicateWithFormat:@"m_age in {11,20,22}"];
NSArray *resultArray3 = [teachers filteredArrayUsingPredicate:predicate3];
for (Teacher *tmp in resultArray3) {
NSLog(@"[3] Age in {11,20,22} match teacher = %@",tmp.m_name);
}
// [4] 通配符 (like)
NSPredicate *predicate4 = [NSPredicate predicateWithFormat:@"m_name like[cd] '*D*'"];
NSArray *resultArray4 = [teachers filteredArrayUsingPredicate:predicate4];
for (Teacher *tmp in resultArray4) {
NSLog(@"[4] Name like[cd] '*D*' match teacher = %@",tmp.m_name);
}
// [5] 逻辑运算 (AND,OR,NOT)
NSPredicate *predicate5 = [NSPredicate predicateWithFormat:@"m_age <= 22 AND m_name like[cd] '*X*'"];
NSArray *resultArray5 = [teachers filteredArrayUsingPredicate:predicate5];
for (Teacher *tmp in resultArray5) {
NSLog(@"[5] Age <= 22 AND name like[cd] '*X*' match teacher = %@",tmp.m_name);
}
// [6] 正则表达式
NSPredicate *predicate6 = [NSPredicate predicateWithFormat:@"m_name matches '^L.*$'"];
NSArray *resultArray6 = [teachers filteredArrayUsingPredicate:predicate6];
for (Teacher *tmp in resultArray6) {
NSLog(@"[6] Name matches '^L.*$' match teacher = %@",tmp.m_name);
}
// [7] keypath
NSPredicate *predicate7 = [NSPredicate predicateWithFormat:@"m_info.m_classNum contains '班'"];
NSArray *resultArray7 = [teachers filteredArrayUsingPredicate:predicate7];
for (Teacher *tmp in resultArray7) {
NSLog(@"[7] Info.classNum contains '班' match teacher = %@",tmp.m_name);
}
}
@end
输出
Match numbers = 0
[1] Age > 15 match teacher = P.K.
[1] Age > 15 match teacher = Y.X.
[2] Name beginswith[cd] 'L' match teacher = L.D.S.
[3] Age in {11,20,22} match teacher = L.D.S.
[3] Age in {11,20,22} match teacher = P.K.
[3] Age in {11,20,22} match teacher = Y.X.
[4] Name like[cd] '*D*' match teacher = L.D.S.
[5] Age <= 22 AND name like[cd] '*X*' match teacher = Y.X.
[6] Name matches '^L.*$' match teacher = L.D.S.
[7] Info.classNum contains '班' match teacher = L.D.S.
[7] Info.classNum contains '班' match teacher = P.K.
[7] Info.classNum contains '班' match teacher = Y.X.
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