-(void)done:(UIButton *)btn{
if ([self.delegate respondsToSelector:@selector(setDefaultLabWithTitle:)]) {
[self.delegate setDefaultLabWithTitle:self.btn.titleLabel.text];
[self showSubTagsView:NO];
}
}
iOS去除特殊字符
NSString *content = model.content;
content = [content stringByTrimmingCharactersInSet:[NSCharacterSet whitespaceCharacterSet]];
NSString* headerData=***;
headerData = [headerData stringByTrimmingCharactersInSet:[NSCharacterSet whitespaceAndNewlineCharacterSet]]; //去除掉首尾的空白字符和换行字符
headerData = [headerData stringByReplacingOccurrencesOfString:@"\r" withString:@""];
headerData = [headerData stringByReplacingOccurrencesOfString:@"\n" withString:@""];
如此即可。
IOS 字符串中去除特殊符号 stringByTrimmingCharactersInSet 应该用于账号登录等
2013-03-26 13:31 13358人阅读 评论(0) 收藏 举报
先上个例子：
NSString * str1 =[nameInput.text stringByTrimmingCharactersInSet:[NSCharacterSetwhitespaceAndNewlineCharacterSet]];
NSString * str2 =[passwdInput.text stringByTrimmingCharactersInSet:[NSCharacterSetwhitespaceAndNewlineCharacterSet]];
[self.delegate loginActionInView:self name:str1 passwd:str2];
转载自：http://blog.csdn.net/aiyongyyy/article/details/8269546
在ios中 可以使用stringByTrimmingCharactersInSet函数过滤字符串中的特殊符号
首先自己定义一个NSCharacterSet, 包含需要去除的特殊符号
NSCharacterSet *set = [NSCharacterSet characterSetWithCharactersInString:@"@／：；（）¥「」＂、[]{}#%-*+=_\\|~＜＞$€^•‘@#$%^&*()_+‘\""];
由于NSString中有全角符号和半角符号, 因此有些符号要包括全角和半角的
然后调用stringByTrimmingCharactersInSet
NSString *trimmedString = [string stringByTrimmingCharactersInSet:set];
trimmedString就是过滤后的字符串
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http://blog.sina.com.cn/s/blog_5421851501014xif.html
去除 username中的空格，table newline，nextline
代码如下：（三行代码）
NSCharacterSet *whitespace = [NSCharacterSet whitespaceAndNewlineCharacterSet];
NSString * username = [mUsernameField stringValue];
username = [username stringByTrimmingCharactersInSet:whitespace];
注释：
stringByTrimmingCharactersInSet:
Returns a new string made by removing from both ends of the receiver characters contained in a given character set.
whitespaceAndNewlineCharacterSet
Returns a character set containing only the whitespace characters space (U+0020) and tab (U+0009) and the newline and nextline characters (U+000A–U+000D, U+0085).
另外可以用 whitespaceCharacterSet 替换 whitespaceAndNewlineCharacterSet 区别newline nextline
whitespaceCharacterSet
Returns a character set containing only the in-line whitespace characters space (U+0020) and tab (U+0009).
NSString *temptext = [messageTextField.text stringByTrimmingCharactersInSet:[NSCharacterSet whitespaceCharacterSet]];
NSString *text = [temptext stringByTrimmingCharactersInSet:[NSCharacterSet whitespaceAndNewlineCharacterSet ]];
第1行是去除2端的空格
第2行是去除回车
+(NSMutableAttributedString *)setStringWithLineSpace:(NSInteger)lineSpace andText:(NSString *)text;
+(NSMutableAttributedString *)setStringWithLineSpace:(NSInteger)lineSpace andText:(NSString *)text{
NSMutableAttributedString * attributedString = [[NSMutableAttributedString alloc] initWithString:text];
NSMutableParagraphStyle * paragraphStyle = [[NSMutableParagraphStyle alloc] init];
[paragraphStyle setLineSpacing:lineSpace];
[attributedString addAttribute:NSParagraphStyleAttributeName value:paragraphStyle range:NSMakeRange(0, [text length])];
return attributedString;
}
- (UIView *)tableView:(UITableView *)tableView viewForHeaderInSection:(NSInteger)section{
}
解决重用问题的方法1 如果是view 就要先移除再添加 如果 只改变内容的话 判断如果内容为空时 要赋予nil ，否则之前的内容会重现
方法2
直接在 表格 里面 重用cell 之后 再改变cell里的内容 （有时候不好使）