static NSRegularExpression *isRichContentRegex;
static NSError *regexError = NULL;
@implementation MkContentUtils
+(void)initialize{
if(isRichContentRegex == nil)
{
isRichContentRegex = [isRichContentRegex initWithPattern:@"<(?!br|p)+[^>]*>" options:NSRegularExpressionCaseInsensitive error:®exError];
// isRichContentRegex = [NSRegularExpression regularExpressionWithPattern:@" (?!br|p)+[^>]*>"
// options:NSRegularExpressionCaseInsensitive
// error:NULL];
NSLog(@"isrichcontent_pattern:%@",isRichContentRegex.pattern);
}
打印日志是 :isrichcontent_pattern:(null) 为什么表达式仍然为零?