ios-字符串替换-正则表达式-例子

需求:在html中查找并替换相应的html标签

代码实现

- (NSString *)replaceImageHtml:(NSString *)oldHtml {
    NSString *regex = @"(<img.*?/>)";
    NSRange r;
    NSMutableString *newHtml = [NSMutableString stringWithString:oldHtml];

    BOOL flag = false;

    while (flag == false) {

        r = [newHtml rangeOfString:regex options:NSRegularExpressionSearch];
        if (r.location != NSNotFound) {
            [newHtml replaceCharactersInRange:r withString:@""];
        } else {
            flag = true;
        }

    };
    return newHtml;
}