//判断是否为整形： - (BOOL)isPureInt:(NSString*)string{ NSScanner* scan = [NSScanner scannerWithString:string]; int val; return[scan scanInt:&val] && [scan isAtEnd]; } //判断是字符串是否为小数 -(BOOL)isPureFloatNum:(NSString*)str{ if(str.length >= 3){ NSArray *aa = [str componentsSeparatedByString:@"."]; if ([self isPureInt:aa[0]] && [self isPureInt:aa[1]]) { return YES; } else { return NO; } }else{ return NO; } }
一、判断字符串是否包含某一个字符
NSString *str1 = @"abcd";
NSString *str = @"a";
if ([str1 rangeOfString:str].location != NSNotFound) {
NSLog(@"这个字符串中有a");
}
二、判断字符串中是否包含数字
#pragma mark - 判断字符串是否包含数字
- (BOOL)isStringContainNumberWith:(NSString *)str {
NSRegularExpression *numberRegular = [NSRegularExpression regularExpressionWithPattern:@"[0-9]" options:NSRegularExpressionCaseInsensitive error:nil];
NSInteger count = [numberRegular numberOfMatchesInString:str options:NSMatchingReportProgress range:NSMakeRange(0, str.length)];
//count是str中包含[0-9]数字的个数，只要count>0，说明str中包含数字
if (count > 0) {
return YES;
}
return NO;
}
三、判断字符串中是否包含英文字母
#pragma mark - 判断字符串是否包含数字
- (BOOL)isStringContainNumberWith:(NSString *)str {
NSRegularExpression *numberRegular = [NSRegularExpression regularExpressionWithPattern:@"[A-Za-z]" options:NSRegularExpressionCaseInsensitive error:nil];
NSInteger count = [numberRegular numberOfMatchesInString:str options:NSMatchingReportProgress range:NSMakeRange(0, str.length)];
//count是str中包含[A-Za-z]数字的个数，只要count>0，说明str中包含数字
if (count > 0) {
return YES;
}
return NO;
}
四、判断字符串中是否包含数字和字母
#pragma mark - 判断字符串是否包含数字
- (BOOL)isStringContainNumberWith:(NSString *)str {
NSRegularExpression *numberRegular = [NSRegularExpression regularExpressionWithPattern:@"A-Za-z0-9]" options:NSRegularExpressionCaseInsensitive error:nil];
NSInteger count = [numberRegular numberOfMatchesInString:str options:NSMatchingReportProgress range:NSMakeRange(0, str.length)];
//count是str中包含[A-Za-z0-9]数字的个数，只要count>0，说明str中包含数字
if (count > 0) {
return YES;
}
return NO;
}
//判断是否 是纯数字
//判断是字符串是否为数字
- (BOOL) deptNumInputShouldNumber:(NSString *)str
{
NSString *regex = @"[0-9]*";
NSPredicate *pred = [NSPredicate predicateWithFormat:@"SELF MATCHES %@",regex];
if ([pred evaluateWithObject:str]) {
return YES;
}
return NO;
}
//直接调用这个方法就行
-(int)checkIsHaveNumAndLetter:(NSString*)password{
//数字条件
NSRegularExpression *tNumRegularExpression = [NSRegularExpression regularExpressionWithPattern:@"[0-9]"options:NSRegularExpressionCaseInsensitive error:nil];
//符合数字条件的有几个字节
NSUInteger tNumMatchCount = [tNumRegularExpression numberOfMatchesInString:password
options:NSMatchingReportProgress
range:NSMakeRange(0, password.length)];
//英文字条件
NSRegularExpression *tLetterRegularExpression = [NSRegularExpression regularExpressionWithPattern:@"[A-Za-z]" options:NSRegularExpressionCaseInsensitive error:nil];
//符合英文字条件的有几个字节
NSUInteger tLetterMatchCount = [tLetterRegularExpression numberOfMatchesInString:password options:NSMatchingReportProgress range:NSMakeRange(0, password.length)];
if (tNumMatchCount == password.length) {
//全部符合数字，表示沒有英文
return 1;
} else if (tLetterMatchCount == password.length) {
//全部符合英文，表示沒有数字
return 2;
} else if (tNumMatchCount + tLetterMatchCount == password.length) {
//符合英文和符合数字条件的相加等于密码长度
return 3;
} else {
return 4;
//可能包含标点符号的情況，或是包含非英文的文字，这里再依照需求详细判断想呈现的错误
}
}