我有一个NSString对象,例如: - ($ 45,0000)
现在我想查找此字符串是否包含()
我该怎么做?
答案 0 :(得分:35)
您是否尝试查找其中是否至少包含(
或)
中的一个?您可以使用-rangeOfCharacterFromSet:
:
NSCharacterSet *cset = [NSCharacterSet characterSetWithCharactersInString:@"()"];
NSRange range = [mystr rangeOfCharacterFromSet:cset];
if (range.location == NSNotFound) {
// no ( or ) in the string
} else {
// ( or ) are present
}
答案 1 :(得分:15)
如果给定的字符串包含给定的char
,则以下方法将返回Yes-(BOOL)doesString:(NSString *)string containCharacter:(char)character
{
return [string rangeOfString:[NSString stringWithFormat:@"%c",character]].location != NSNotFound;
}
您可以按如下方式使用它:
NSString *s = @"abcdefg";
if ([self doesString:s containCharacter:'a'])
NSLog(@"'a' found");
else
NSLog(@"No 'a' found");
if ([self doesString:s containCharacter:'h'])
NSLog(@"'h' found");
else
NSLog(@"No 'h' found");
输出:
2013-01-11 11:15:03.830 CharFinder [17539:c07]'a'找到了
2013-01-11 11:15:03.831 CharFinder [17539:c07]没有找到'h'
答案 2 :(得分:2)
- (bool) contains: (NSString*) substring {
NSRange range = [self rangeOfString:substring];
return range.location != NSNotFound;
}
答案 3 :(得分:2)
我对我在代码中使用的问题得到了一般性答案。此代码包括以下规则: 1.没有特殊字符 2.至少一个大写字母和一个小英文字母 3.至少一个数字
BOOL lowerCaseLetter,upperCaseLetter,digit,specialCharacter;
int asciiValue;
if([txtPassword.text length] >= 5)
{
for (int i = 0; i < [txtPassword.text length]; i++)
{
unichar c = [txtPassword.text characterAtIndex:i];
if(!lowerCaseLetter)
{
lowerCaseLetter = [[NSCharacterSet lowercaseLetterCharacterSet] characterIsMember:c];
}
if(!upperCaseLetter)
{
upperCaseLetter = [[NSCharacterSet uppercaseLetterCharacterSet] characterIsMember:c];
}
if(!digit)
{
digit = [[NSCharacterSet decimalDigitCharacterSet] characterIsMember:c];
}
asciiValue = [txtPassword.text characterAtIndex:i];
NSLog(@"ascii value---%d",asciiValue);
if((asciiValue >=33&&asciiValue < 47)||(asciiValue>=58 && asciiValue<=64)||(asciiValue>=91 && asciiValue<=96)||(asciiValue>=91 && asciiValue<=96))
{
specialCharacter=1;
}
else
{
specialCharacter=0;
}
}
if(specialCharacter==0 && digit && lowerCaseLetter && upperCaseLetter)
{
//do what u want
NSLog(@"Valid Password %d",specialCharacter);
}
else
{
NSLog(@"Invalid Password %d",specialCharacter);
UIAlertView *alert = [[UIAlertView alloc] initWithTitle:@"Error"
message:@"Please Ensure that you have at least one lower case letter, one upper case letter, one digit and No Any special character"
delegate:nil cancelButtonTitle:@"OK" otherButtonTitles:nil];
[alert show];
}
答案 4 :(得分:2)
为什么总是用于NSCharactorSet?这是一个简单而强大的解决方案
NSString *textStr = @"This is String Containing / Character";
if ([textStr containsString:@"/"])
{
NSLog(@"Found!!");
}
else
{
NSLog(@"Not Found!!");
答案 5 :(得分:0)
您可以使用
NSString rangeOfString: (NSString *) string
如果NSRange返回属性'location'等于NSNotFound,则该字符串不包含传递的字符串(或字符)。