IOS NSPredicate 查询、搜索

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@interface TFCityAddressModel : NSObject@property (nonatomic, copy) NSString *cityName;@property (nonatomic, copy) NSString *cityPinYin;@property (nonatomic, copy) NSString *cityPinYinHead;@end@implementation TFCityAddressModel@end

//单个字符串的查询语句// [NSPredicate predicateWithFormat:@"SELF CONTAINS[cd] %@",searchBarText];- (void)testNSPredicate{    NSString *searchBarText = @"北京";    NSArray *_cityAddressArray = @[@"杭州",@"台北",@"北京"];    NSPredicate *_tfPredicate = [NSPredicate predicateWithFormat:@"SELF CONTAINS[cd] %@",searchBarText];    NSArray *array = [_cityAddressArray filteredArrayUsingPredicate:_tfPredicate];    for (NSString *cityName in array)    {        CHDebugLog(@"testNSPredicate----%@",cityName);    }}结果如下：CommonDemo[4098:101861] testModelNSPredicate——北京

//model查询语句- (void)testModelNSPredicate{    //NSString *searchBarText = @"北京";    NSString *searchBarText = @"t";    NSMutableArray *_cityAddressArray = [[NSMutableArray alloc]init];        TFCityAddressModel *_info = [[TFCityAddressModel alloc]init];    _info.cityName = @"北京";    _info.cityPinYin = @"beijing";    _info.cityPinYinHead = @"b";    [_cityAddressArray addObject:_info];        TFCityAddressModel *_info1 = [[TFCityAddressModel alloc]init];    _info1.cityName = @"台北";    _info1.cityPinYin = @"taibei";    _info1.cityPinYinHead = @"t";    [_cityAddressArray addObject:_info1];        TFCityAddressModel *_info2 = [[TFCityAddressModel alloc]init];    _info2.cityName = @"杭州";    _info2.cityPinYin = @"hangzhou";    _info2.cityPinYinHead = @"h";    [_cityAddressArray addObject:_info2];        NSPredicate *_tfPredicate = [NSPredicate predicateWithFormat:@"(cityName CONTAINS[cd] %@) OR (cityPinYin CONTAINS[cd] %@) OR (cityPinYinHead CONTAINS[cd] %@)", searchBarText, searchBarText, searchBarText];    NSArray *array = [_cityAddressArray filteredArrayUsingPredicate:_tfPredicate];        for (TFCityAddressModel *_modelInfo in array)    {        CHDebugLog(@"testNSPredicate----%@",_modelInfo.cityName);    }}结果如下：CommonDemo[4098:101861] testModelNSPredicate——北京CommonDemo[4098:101861] testModelNSPredicate----台北

- (void)testNSPredicateExpression{    NSString *regex = @"[A-Za-z]";        //判断a是否属于正则表达式[A-Za-z]，若是则正确，否则错误。    BOOL a = [self isValidateRegularExpression:@"a" byExpression:regex];        if (a)    {        CHDebugLog(@"------test testNSPredicateExpression");    }}//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];}

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