1、谓词：
Cocoa框架中的NSPredicate用于查询，原理和用法都类似于SQL中的where，作用相当于数据库的过滤取。我们可以编写简单的谓词语句，就可以从数组中过滤出我们想要的数据。
//<、>、=，<=、>=、 and、or
NSArray * array = @[@12,@34,@10,@90,@89];
NSPredicate * predicate1 = [NSPredicate predicateWithFormat:@"self >= 34 or self < 89 "];
NSArray * resultArray1 = [array filteredArrayUsingPredicate:predicate1];
//CONTAINS、BEGINSWITH、endswith : 包含谁、 以谁为前缀，以谁为后缀;
//[c]:不区分大小写 ；[d]:不区分重音符；[cd]
NSArray * array2 = [NSArray arrayWithObjects:@"erw",@"guangzhou",@"luzhou",@"郑州 00 ",@"杭州 00",@"langzhou",@"wuhan", nil];
NSPredicate * predicate2 = [NSPredicate predicateWithFormat:@"self contains[c] 'Ang'"];
NSArray * resultArray2 = [array2 filteredArrayUsingPredicate:predicate2];
NSPredicate * predicate3 = [NSPredicate predicateWithFormat:@"self endswith[c] 'ou'"];
NSArray * resultArray3 = [array2 filteredArrayUsingPredicate:predicate3];
//like ：像
//*:0个或者多个字符；通配符
//?:1个字符；
NSArray * array2 = [NSArray arrayWithObjects:@"erw",@"guangzhou",@"luzhou",@"郑州 00 ",@"杭州 00",@"langzhou",@"wuhan", nil];
NSPredicate * predicate4 = [NSPredicate predicateWithFormat:@"self like '?州*'"];
NSArray * resultArray4= [array2 filteredArrayUsingPredicate:predicate4];
//取 交集、差集 :self in ~;not (self in ~)
NSArray * array4 = @[@34,@67,@45];
NSArray * filterArray = @[@12,@34];
NSPredicate * predicate6 = [NSPredicate predicateWithFormat:@"not (self in %@ )",filterArray];
NSArray * resultArray6 = [array4 filteredArrayUsingPredicate:predicate6];
//自定义类型
People * p1 = [[People alloc]init];
p1.age =19 ;
p1.name = @"zhangSan";
People * p2 = [[People alloc]init];
p2.age = 29 ;
p2.name = @"liSi";
People * p3 = [[People alloc]init];
p3.age = 22;
p3.name = @"zhangSanfeng";
People * p4 = [[People alloc]init];
p4.age = 20 ;
p4.name = @"zhang";
People * p5 = [[People alloc]init];
p5.age = 19 ;
p5.name = @"San";
NSArray * array3 =[ NSArray arrayWithObjects:p1,p2,p3,p4,p5, nil];
//说明过滤规则
NSPredicate * predicate5 = [NSPredicate predicateWithFormat:@"self.name beginswith 'zhang' and self.age > 20"];
NSArray * resultArray5 = [array3 filteredArrayUsingPredicate:predicate5];
NSLog(@"%@",resultArray5);
//取 交集、差集 :self in ~;not (self in ~)
NSArray * array4 = @[@34,@67,@45];
NSArray * filterArray = @[@12,@34];
NSPredicate * predicate6 = [NSPredicate predicateWithFormat:@"not (self in %@ )",filterArray];
NSArray * resultArray6 = [array4 filteredArrayUsingPredicate:predicate6];
NSLog(@"%@",resultArray6);
//2、判断某一个对象是否满足条件
NSString * str = @"eurtio";
NSPredicate * predicate7 = [NSPredicate predicateWithFormat:@"self beginswith 'q'"];
//判断str是否满足predicate7这个条件
BOOL result7 = [predicate7 evaluateWithObject:str];
NSLog(@"%d",result7);
NSNumber * num = @90 ;
NSPredicate * predicate8 = [NSPredicate predicateWithFormat:@"self < 80"];
BOOL result8 = [predicate8 evaluateWithObject:num];
NSLog(@"result8 = %d",result8);
People * p = [[People alloc]init];
p.age =89 ;
p.name = @"zhangSan";
NSPredicate * predicate9 = [NSPredicate predicateWithFormat:@"self.age >= 80 and self.name beginswith[c] 'Zh'"];
BOOL result9 = [predicate9 evaluateWithObject:p];
NSLog(@"result9 = %d",result9);
2、正则表达式
正则表达式，又称正规表示法，是对字符串操作的一种逻辑公式。 正则表达式可以检测给定的字符串是否符合我们定义的逻辑，也可以从字符串中获取我们想要的特定部分。它可以迅速地用极简单的方式达到字符串的复杂控制。
//是否是有效的正则表达式
+ (BOOL)isValidateRegularExpression:(NSString *)strDestination byExpression:(NSString *)strExpression
{
NSPredicate *predicate = [NSPredicate predicateWithFormat:@"SELF MATCHES %@", strExpression];
return [predicate evaluateWithObject:strDestination];
}
/验证email
+(BOOL)isValidateEmail:(NSString *)email
{
NSString * strRegex =@"[A-Z0-9a-z._%+-]+@[A-Za-z0-9.-]+\\.[A-Za-z]{1,5}" ;
NSLog(@"%@",strRegex);
BOOL rt = [self isValidateRegularExpression:email byExpression:strRegex];
return rt;
}
//验证电话号码
+(BOOL)isValidateTelNumber:(NSString *)number {
NSString *strRegex = @"[0-9]{1,20}";
BOOL rt = [self isValidateRegularExpression:number byExpression:strRegex];
return rt;
}
// 正则判断手机号码地址格式
- (BOOL)isMobileNumber:(NSString *)mobileNum
{
/**
* 手机号码
* 移动：134[0-8],135,136,137,138,139,150,151,157,158,159,182,187,188
* 联通：130,131,132,152,155,156,185,186
* 电信：133,1349,153,180,189
*/
NSString * MOBILE = @"^1(3[0-9]|5[0-35-9]|8[025-9])\\d{8}$";
/**
* 中国移动：China Mobile
* 134[0-8],135,136,137,138,139,150,151,157,158,159,182,187,188
*/
NSString * CM = @"^1(34[0-8]|(3[5-9]|5[017-9]|8[278])\\d)\\d{7}$";
/**
* 中国联通：China Unicom
* 130,131,132,152,155,156,185,186
*/
NSString * CU = @"^1(3[0-2]|5[256]|8[56])\\d{8}$";
/**
* 中国电信：China Telecom
* 133,1349,153,180,189
*/
NSString * CT = @"^1((33|53|8[09])[0-9]|349)\\d{7}$";
/**
* 大陆地区固话及小灵通
* 区号：010,020,021,022,023,024,025,027,028,029
* 号码：七位或八位
*/
// NSString * PHS = @"^0(10|2[0-5789]|\\d{3})\\d{7,8}$";
NSPredicate *regextestmobile = [NSPredicate predicateWithFormat:@"SELF MATCHES %@", MOBILE];
NSPredicate *regextestcm = [NSPredicate predicateWithFormat:@"SELF MATCHES %@", CM];
NSPredicate *regextestcu = [NSPredicate predicateWithFormat:@"SELF MATCHES %@", CU];
NSPredicate *regextestct = [NSPredicate predicateWithFormat:@"SELF MATCHES %@", CT];
if (([regextestmobile evaluateWithObject:mobileNum] == YES)
|| ([regextestcm evaluateWithObject:mobileNum] == YES)
|| ([regextestct evaluateWithObject:mobileNum] == YES)
|| ([regextestcu evaluateWithObject:mobileNum] == YES))
{
if([regextestcm evaluateWithObject:mobileNum] == YES)
{
NSLog(@"China Mobile");
}
else if([regextestct evaluateWithObject:mobileNum] == YES)
{
NSLog(@"China Telecom");
}
else if ([regextestcu evaluateWithObject:mobileNum] == YES)
{
NSLog(@"China Unicom");
}
else
{
NSLog(@"Unknow");
}
return YES;
}
else
{
return NO;
}
}