可可教程中的字符串格式

Question

我正在做一个Cocoa教程，我需要计算一个字段中的字符，然后输出类似'the_string_i_am_count'的字符有21个字符。

我设法获取字符串，计算它并输出计数但我不知道如何输出计数以及字符串和其他信息。

我该怎么做？

-(IBAction)countCharacters:(id)sender
{
    //i had to connect this to the class also to make it get the value.
    //NSString *string = [inputField stringValue];

    //get the number of chars
    NSUInteger length = [[inputField stringValue] length];

    [outputField setIntValue:length]; //string];
    //[outputField setStringValue: @"'s' has %d characters.", string, length];
}

半工作代码：

-(IBAction)countCharacters:(id)sender
{
    //i had to connect this to the class also to make it get the value.
    NSString *string = [inputField stringValue];

    //get the number of chars
    NSUInteger length = [[inputField stringValue] length];

    [outputField setStringValue:[NSString stringWithFormat:@"'%s' has %d characters.", string, length]];
}

Answer 1

[outputField setStringValue:[NSString stringWithFormat:@"%@ has %@ characters.", string, length]];