NSPredicate搜索NSString中的数字

Question

用NSPredicate在NSString中查询数字：

NSString *test = @"[0-9]";
NSString *testString = @"ab9";
NSPredicate *predicate = [NSPredicate predicateWithFormat:@"(%@ CONTAINS[c] %@)", test,testString];
BOOL bResult = [predicate evaluateWithObject:testString]

但是只搜索到到了开始的数字，我也试过@"[0-9]+"和@"[0-9]*"这样，但是都得不到正确结果

Answer 1

NSCharacterSet  *set= [NSCharacterSet alphanumericCharacterSet];
if ([string rangeOfCharacterFromSet:[set invertedSet]].location == NSNotFound) {
    // contains A-Z,a-z, 0-9 
} else {
    // invalid
}

肯定解决