Question

我是目标c和iOS的新手。我有一个像这样的字符串

NSString *string1 = @"My name is john";

我只想反转约翰＆＃39;到了＆＃39; nhoj＆＃39;。请帮我！！！。谢谢

Answer 1

你走了。可能会在以下片段后帮助您。

    NSString *string1 = @"My name is john";

NSArray *arr = [string1 componentsSeparatedByString:@" "];

NSString *temp_sre = [arr objectAtIndex:arr.count - 1];

int len = [temp_sre length];
NSMutableString *reverseName = [[NSMutableString alloc] initWithCapacity:len];
for(int i=len-1;i>=0;i--)
{
    [reverseName appendString:[NSString stringWithFormat:@"%c",[temp_sre characterAtIndex:i]]];
}
NSLog(@"reverseName = %@",reverseName);

NSMutableArray *final_array = [[NSMutableArray alloc] init];
final_array = arr.mutableCopy;
[final_array removeLastObject];
[final_array insertObject:reverseName atIndex:final_array.count];

NSString *final_string = [final_array componentsJoinedByString:@" "];

NSLog(@"FInal String = %@",final_string);

Answer 2

试试这个，它会产生你想要的输出。

NSString *strName = @"My name is john" ;

NSArray *arrStringPart = [strName componentsSeparatedByString:@" "];
NSString *strToReverse = [arrStringPart objectAtIndex:arrStringPart.count - 1];


int len = (int)[strToReverse length];
NSMutableString *mutStrReverce = [[NSMutableString alloc] initWithCapacity:strName.length];

for(int i=0;i<arrStringPart.count-1;i++)
{
    [mutStrReverce appendString:[NSString stringWithFormat:@"%@ ",[arrStringPart objectAtIndex:i]]];
}
for(int i=len-1;i>=0;i--)
{
    [mutStrReverce appendString:[NSString stringWithFormat:@"%c",[strToReverse characterAtIndex:i]]];
}

NSLog(@"%@",mutStrReverce);

想要在ios中使用NSString来反转给定字符串的某些特定单词形式

2 个答案: