Checking if NSString is Integer
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Possible Duplicate:
NSString is integer?
我正在寻找一个字符串是否只有数字。 基本上:
1 2 3 4 | if (string is integer): #do whatever else: #error |
我该怎么做? 谢谢!
我用过
1 2 3 4 5 6 | NSCharacterSet* notDigits = [[NSCharacterSet decimalDigitCharacterSet] invertedSet]; if ([newString rangeOfCharacterFromSet:notDigits].location == NSNotFound) { // newString consists only of the digits 0 through 9 } |
1 2 3 4 | -(BOOL)isANumber:(NSString *)string{ NSPredicate *numberPredicate = [NSPredicate predicateWithFormat:@"SELF MATCHES '^[0-9]+$'"]; return [numberPredicate evaluateWithObject:string]; } |