ios - 解析和排序 NSMutableArray Objective C

Question

我有一个带有文本的 UITextField:9, 1, x, 1, 3, 3, y, 8

我需要删除所有重复项，删除所有非数字字符并将剩余数字按升序排列。

到目前为止我有:

-(IBAction)sortArrayPressed:(id)sender {

NSMutableArray *array = [[NSMutableArray alloc]init];
[array addObject:self.textToParseTextField.text];

        NSLog([array description],nil);

}

输出如下:

Project[10176:2274463] (
    "9, 1, x, 1, 3, 3, y, 8"
)

我使用 NSMUtableArray 是否正确？我们如何处理这种同时具有 Int 和 String 类型的数组的解析和排序？谢谢!

Answer 1

你可以这样做，filter 删除非数字字符串，转换为 Set 删除重复项:

objective-C :

NSString *str = @"9, 1, x, 1, 3, 3, y, 8";
NSArray* a = [str componentsSeparatedByString:@", "];
NSMutableArray *b = [NSMutableArray new];
for (NSString *digit in a) {
    NSRange range = [digit rangeOfString:@"[0-9]" options:NSRegularExpressionSearch];
    if (range.location == NSNotFound) {

    } else {
        [b addObject:digit];
    }
}
b = [NSMutableArray arrayWithArray:[NSSet setWithArray:b].allObjects];
[b sortUsingSelector:@selector(compare:)]; //(1,3,8,9)

swift :

let a = "9, 1, x, 1, 3, 3, y, 8".components(separatedBy: ", ")
let b = a.filter({ $0.range(of: "[0-9]", options: .regularExpression, range: nil, locale: nil) != nil })
Array(Set(b)).sorted() //["1", "3", "8", "9"]