Question

NSString *numberVector = @"( 1, 2, 3, 4)";

我想从这些数字中获取NSMutableArray。我怎么能这样做？

Answer 1

这是更简单的一个，首先将其转换为json字符串然后使用NSJSONSerialization转换为数组

NSString *numberVector = @"( 1, 2, 3, 4)";
numberVector = [numberVector stringByReplacingOccurrencesOfString:@"(" withString:@"["];
numberVector = [numberVector stringByReplacingOccurrencesOfString:@")" withString:@"]"];
NSError* error;
NSMutableArray *arr = [NSJSONSerialization JSONObjectWithData:[numberVector dataUsingEncoding:NSUTF8StringEncoding] options:NSJSONReadingMutableContainers error:&error];

<强>更新

这对@"( 1, 2, 3, 4)"和@"(\n 1,\n 2,\n 3,\n 4\n)"都有效，因为json字符串可以有新的行和空格。

P.S 这适用于其他iOS的iOS 5.0或更高版本，您可以使用SBJSON或其他可用的解析库。

Answer 2

如果您知道这正是您的格式，并且不必在空格，括号或逗号的数量上保持灵活性：

NSCharacterSet *trimSet = [NSCharacterSet characterSetWithCharactersInString:@" ()"];
numberVector = [numberVector stringByTrimmingCharactersInSet:trimSet];
NSArray *numbers = [numberVector componentsSeparatedByString:@", "];

Answer 3

尝试这样，它适用于任何只接受数字的数据类型。

NSString *numberVector = @"(\n 1,\n 2,\n 3,\n 4\n)";

    NSString *onlyNumbers = [numberVector  stringByReplacingOccurrencesOfString:@"[^0-9,]" withString:@"" options:NSRegularExpressionSearch range:NSMakeRange(0, [numberVector  length])];
    NSArray *numbers=[onlyNumbers componentsSeparatedByString:@","];
    NSLog(@"%@",numbers);

Answer 4

请参阅下面的代码，它应该有效：

  NSCharacterSet *cSet = [NSCharacterSet characterSetWithCharactersInString:@" ()"];  
  numberVector = [numberVector stringByTrimmingCharactersInSet:cSet];
  //specify delimiter below
  NSArray *numbers = [numberVector componentsSeparatedByString:@", "];

Answer 5

有了这个：

NSString *numberVector = @"( 1, 2, 3, 4)";

修改

NSError *error = NULL;
NSRegularExpression *regex = [NSRegularExpression regularExpressionWithPattern:@"&([^;])*;" options:NSRegularExpressionCaseInsensitive error:&error];
NSString *modifiedString = [numberVector stringByReplacingMatchesInString:string options:0 range:NSMakeRange(0, [string length]) withTemplate:@""];

NSArray *listItems = [[modifiedString stringByTrimmingCharactersInSet:[NSCharacterSet newlineCharacterSet]] componentsSeparatedByString:@", "]

如何从NSString解析数字？

5 个答案: