• 我最近的項目中需要給服務(wù)器報送數(shù)據(jù)，但是在報送前需要先判斷用戶填寫數(shù)據(jù)的正確性。我對oc不是特別熟悉，沒有發(fā)現(xiàn)比較方便的方法，因此將我的解決方法記錄下來，給需要的人，當(dāng)然如果你有好方法，歡迎留言！
  關(guān)于正則表達式，請自行g(shù)oogle!

NSString+FormValidation.h

#import <Foundation/Foundation.h>

@interface NSString (FormValidation)
//判斷是否在0-99之間
- (BOOL)isValidBetween0_99;
//判斷是否在0-999之間
- (BOOL)isValidBetween0_999;
//判斷是否在1-15之間
- (BOOL)isValidBetween1_15;
//判斷是否在0-99.9之間（支持 ".",".1"等）
- (BOOL)isValidBetween0_0_to_99_9;
@end

NSString+FormValidation.m

#import "NSString+FormValidation.h"

@implementation NSString (FormValidation)
- (BOOL)isValidBetween0_99 {
    NSError* error=nil;
    NSString* regex=@"^\\d{1,2}$";
    NSRegularExpression* reg=[NSRegularExpression regularExpressionWithPattern:regex options:NSRegularExpressionCaseInsensitive error:&error];
    NSArray* match =[reg matchesInString:self options:0 range:NSMakeRange(0, self.length)];
    NSLog(@"match count %li",match.count);
    if (match.count!=0) {
        return YES;
    }
    return NO;
}
- (BOOL)isValidBetween0_999 {
    NSError* error=nil;
    NSString* regex=@"^\\d{1,3}$";
    NSRegularExpression* reg=[NSRegularExpression regularExpressionWithPattern:regex options:NSRegularExpressionCaseInsensitive error:&error];
    NSArray* match =[reg matchesInString:self options:0 range:NSMakeRange(0, self.length)];
    NSLog(@"match count %li",match.count);
    if (match.count!=0) {
        return YES;
    }
    return NO;
}
- (BOOL)isValidBetween1_15
{
    NSError* error=nil;
    NSString* regex=@"^[0-1][0-5]$|^\\d$";
    NSRegularExpression* reg=[NSRegularExpression regularExpressionWithPattern:regex options:NSRegularExpressionCaseInsensitive error:&error];
    NSArray* match =[reg matchesInString:self options:0 range:NSMakeRange(0, self.length)];
    NSLog(@"match count %li",match.count);
    if (match.count!=0) {
        return YES;
    }
    return NO;
}
- (BOOL)isValidBetween0_0_to_99_9
{
    NSError* error=nil;
    NSString* regex=@"^\\d?\\.\\d?$|^\\d{2}\\.\\d?$|^\\d{1,2}$";
    NSRegularExpression* reg=[NSRegularExpression regularExpressionWithPattern:regex options:NSRegularExpressionCaseInsensitive error:&error];
    NSArray* match =[reg matchesInString:self options:0 range:NSMakeRange(0, self.length)];
    NSLog(@"match count %li",match.count);
    if (match.count!=0) {
        return YES;
    }
    return NO;
}
@end