首页 > 代码库 > Objective C －2 - 随机数，可变字符串，字符串，SubString

Objective C －2 - 随机数，可变字符串，字符串，SubString

2024-07-06 06:37:49   223人阅读

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int main(int argc, const char * argv[])
{
 
    @autoreleasepool {
         
         
        NSString *outputString = @"1234567890!@#$%^&*()";
         
        NSMutableString *resultString = [[NSMutableString alloc] init];
         
        NSLog(@"%d", (int)outputString.length);
         
        for(int j=0;j<outputString.length;j++)
        {
            NSLog(@"Index = %d  Char = %@",j, [outputString substringWithRange:NSMakeRange(j, 1)]);
        }
         
         
         
        for(int i=0;i<20;i++)
        {
            int index  = arc4random() % outputString.length;
            NSString *indexString = [outputString substringWithRange:NSMakeRange(index, 1)];
             
            [resultString appendFormat:@"%d %@ ", index, indexString];
        }
         
        if (resultString) {
            NSLog(@"%@", resultString);
        }
 
         
        return 0;
    }
}

　　


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