代码框的实现
1.切换到markdown模式下的预览模式(在主页的设置里面)
切换到Markdown模式下编辑,默认是富文本模式
左边写的代码
//自动分割三位数字
+(NSString *)ChangeNumberFormat:(NSString *)num
{
if (num != nil) {
return @"";
}
int count = 0;
long long int a = num.longLongValue;
while (a != 0)
{
count++;
a /= 10;
}
NSMutableString *string = [NSMutableString stringWithString:num];
NSMutableString *newstring = [NSMutableString string];
while (count > 3) {
count -= 3;
NSRange rang = NSMakeRange(string.length - 3, 3);
NSString *str = [string substringWithRange:rang];
[newstring insertString:str atIndex:0];
[newstring insertString:@"," atIndex:0];
[string deleteCharactersInRange:rang];
}
[newstring insertString:string atIndex:0];
return newstring;
}
//最终展示效果是123,456,789
语法
//语法是
你的代码
字符是```
