Ios 从字符串中提取数字

我有很多这样的字符串：

@"this is the content. The content of this string may vary, as well as the length, and my include any characters, with numbers Y = 295.000000 X = 207.500000"

coordsFinal.x = 295.000000;
coordsFinal.y = 207.500000;

部分Y=295.000000 X=207.500000始终保持不变，但X和Y数字可能会改变

我需要以某种方式获得这些数字，并执行以下操作：

@"this is the content. The content of this string may vary, as well as the length, and my include any characters, with numbers Y = 295.000000 X = 207.500000"

coordsFinal.x = 295.000000;
coordsFinal.y = 207.500000;

其格式为：

coordsFinal.x = [NSString stringWithFormat: @"%@", trimmed string];

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有什么想法吗？

您可以使用正则表达式提取数字：

NSString *string = ...; // Your string
NSRegularExpression *regex = [NSRegularExpression regularExpressionWithPattern:@"Y = (\\d+.\\d+) X = (\\d+.\\d+)" options:0 error:NULL];
NSTextCheckingResult *match = [regex firstMatchInString:string options:0 range:NSMakeRange(0, [string length])];
if (match) {
    NSRange yRange = [match rangeAtIndex:1];
    NSString *yString = [string substringWithRange:yRange];
    NSRange xRange = [match rangeAtIndex:2];
    NSString *xString = [string substringWithRange:xRange];

    NSLog(@"X = %@, Y = %@", xString, yString);
}

输出：

---

您可以使用正则表达式提取数字：

NSString *string = ...; // Your string
NSRegularExpression *regex = [NSRegularExpression regularExpressionWithPattern:@"Y = (\\d+.\\d+) X = (\\d+.\\d+)" options:0 error:NULL];
NSTextCheckingResult *match = [regex firstMatchInString:string options:0 range:NSMakeRange(0, [string length])];
if (match) {
    NSRange yRange = [match rangeAtIndex:1];
    NSString *yString = [string substringWithRange:yRange];
    NSRange xRange = [match rangeAtIndex:2];
    NSString *xString = [string substringWithRange:xRange];

    NSLog(@"X = %@, Y = %@", xString, yString);
}

输出：

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您只需要以下方法来调用要修剪的字符串

 [yourstring stringByTrimmingCharactersInSet:[NSCharacterSet whitespaceCharacterSet]]

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您只需要以下方法来调用要修剪的字符串

 [yourstring stringByTrimmingCharactersInSet:[NSCharacterSet whitespaceCharacterSet]]