如何从字符串中删除一个单词

Question

你好，我是 Objective-c 的初学者 我有一个这样的 nsstring

Select *  from Store_Master where AND  VDivison = 'Casual Dining' AND VBrand_Name = 'Pinkberry' AND VCountry_Name = 'Egypt' AND VCity = 'Cairo' AND VBuilding_mall_name = 'Dandy Mega Mall' GROUP BY VStore_Name

我只想删除第一次出现的 AND，我该如何删除。

提前谢谢你

Answer 1

使用stringByReplacingCharactersInRange 仅替换第一个“AND”：

NSString* s = @"Select *  from Store_Master where AND  VDivison = 'Casual Dining' AND VBrand_Name = 'Pinkberry' AND VCountry_Name = 'Egypt' AND VCity = 'Cairo' AND VBuilding_mall_name = 'Dandy Mega Mall' GROUP BY VStore_Name";
NSRange replaceRange = [s rangeOfString:@"AND"];
if (replaceRange.location != NSNotFound){
    NSString* result = [s stringByReplacingCharactersInRange:replaceRange withString:@""];
}

这将导致：

Select *  from Store_Master where   VDivison = 'Casual Dining' AND VBrand_Name = 'Pinkberry' AND VCountry_Name = 'Egypt' AND VCity = 'Cairo' AND VBuilding_mall_name = 'Dandy Mega Mall' GROUP BY VStore_Name

已编辑：

如果您想以不区分大小写的方式删除出现的AND（无论是大写还是小写），请在创建 NSRange 时使用NSStringCompareOptions，如下所示：

NSRange replaceRange = [s rangeOfString:@"and" options:NSCaseInsensitiveSearch];

其余代码相同。

Answer 2

NSString *s = @"your string";
NSInteger loc = [s rangeOfString: @"AND"].location;
if (loc != NSNotFound) s = [NSString stringWithFormat: @"%@%@", [s substringToIndex: loc], [s substringFromIndex: loc + 3]];

这将删除第一次出现的 AND。第二行查找第一次出现的位置。第三行获取前后的子字符串，并使用stringWithFormat将它们放在一起。

获取位置后，还有其他方法可以将其删除，例如使用stringByReplacingCharactersInRange 给定范围的查找-替换，或者像我的示例一样使用stringByAppendingString 连接部分。

Answer 3

NSString *String1 = @"Select *  from Store_Master where AND  VDivison = 'Casual Dining' AND VBrand_Name = 'Pinkberry' AND VCountry_Name = 'Egypt' AND VCity = 'Cairo' AND VBuilding_mall_name = 'Dandy Mega Mall' GROUP BY VStore_Name";
NSString *String2 = [String1 stringByReplacingOccurrencesOfString:@"AND" withString:@""];



NSString * aString  = @"Select *  from Store_Master where AND  VDivison = 'Casual Dining' AND VBrand_Name = 'Pinkberry' AND VCountry_Name = 'Egypt' AND VCity = 'Cairo' AND VBuilding_mall_name = 'Dandy Mega Mall' GROUP BY VStore_Name";
NSRange replaceRange = [aString rangeOfString:@"AND"];
if (replaceRange.location !=NSNotFound){
    NSString * newString = [aString stringByReplacingCharactersInRange:replaceRange withString:@""];
    NSLog(newString);
}