iphone - 在动态 NSString 中间添加一个字符串

Question

我有 NSString，如果 NSString 的内容来自 url。我想在这个 NSString 之间添加一个单词，然后是一个特定的单词。这个 NSString 是否会不断变化

例如：

我得到一个数据" hi mac this is ios"，这个字符串可能会像这样不断变化 " hi ios this mac" or hi this is mac ios"，等等。

我想添加一个像“hello”这样的词，后跟“mac”

" hi mac hello this is ios"
" hi ios this mac hello"
"hi this is mac hello ios"

我怎样才能做到这一点

Answer 1

试试这个...

Yourstring = [Yourstring stringByReplacingOccurrencesOfString:@"mac" withString:@"mac hello "];

Answer 2

您可以使用 ：

string = [string stringByReplacingOccurrencesOfString:@"Mac" withString:@"Mac Hello"];

Answer 3

NSString *str = @"Hi Mac 这是";

if ([str rangeOfString:@"mac" options:NSCaseInsensitiveSearch].location != NSNotFound)
{
    int location = [str rangeOfString:@"mac" options:NSCaseInsensitiveSearch].location;

    NSMutableString *mstr = [[[NSMutableString alloc] initWithString:str] autorelease];
    NSString *strtemp = @"mac";

    [mstr replaceCharactersInRange:NSMakeRange(location, [strtemp length]) withString:[NSString stringWithFormat:@"%@ %@", strtemp, @"hello"]];

    NSLog(@"test  %@", mstr);
}

Answer 4

如果你不想用mac hello替换mac，那么你可以这样做

NSMutableString *string=[NSMutableString stringWithString:@"hi mac this is ios"];
NSRange range = [string rangeOfString:@"mac"];    
[string insertString:@" hello" atIndex:range.location+3];
NSLog(@"str=%@",string);

输出 ：

str=hi mac hello this is ios