关键字：表情符号、正则表达式、汉字、检测、过滤、搜狗换行
每一次的文章都是产品妹子无脑的需求产生的，这次也不例外。
狗狗说了，name(UITextField)只能是小括号、逗号、中划线以及字母数字汉字，不能有特殊符号；
狗狗还说了，remark(UITextView)不能有表情符号，以及其他的一些符号;
UITextField监测-过滤
首先需要添加一个事件[textfieldName addTarget:selfaction:@selector(textFieldDidChange:)forControlEvents:UIControlEventAllEditingEvents];
这样再加上本来有的事件，可以监测2个
#pragma mark - UITextFieldDelegate
-(void)textFieldDidChange:(UITextField*)textField{
[[***NameRules sharedManager] textFieldDidChange:textField];
}
-(BOOL) textField:(UITextField*)textField shouldChangeCharactersInRange:(NSRange)range replacementString:(NSString*)string{
return[[***NameRules sharedManager] textField:textFieldshouldChangeCharactersInRange:rangereplacementString:string];
}
然后是封装的事件处理函数：
@interface***NameRules()
@property(nonatomic,assign)BOOLisSouGouNewLine;
@property(nonatomic,strong)UITextField*preTextField;
@end
@implementation***NameRules
+(***NameRules*) sharedManager{
static ***NameRules*sharedNameRules =nil;
staticdispatch_once_tpreDicate;
dispatch_once(&preDicate, ^{
sharedNameRules = [[selfalloc]init];
});
returnsharedNameRules;
}
-(NSString*)textFieldDidChange:(UITextField*)textField
{
UITextRange*selectedRange = [textFieldmarkedTextRange];
NSString* newText = [textFieldtextInRange:selectedRange];
if(newText.length>0) {//输入拼音时候
return@"";
}
if(![***Rules validateName:textField.text])
{
[WToast showWithText:kNameDescExisted];
textField.text= [***Rules repairName:textField.text];;
}
return@"";
}
-(BOOL) textField:(UITextField*)textField shouldChangeCharactersInRange:(NSRange)range replacementString:(NSString*)string{
if([stringisEqualToString:@"\n"] )
{
[textFieldresignFirstResponder];
returnNO;
}
if(self.isSouGouNewLine&& string.length==0) {
self.isSouGouNewLine=NO;
self.preTextField=nil;
returnNO;
}
elseif(self.isSouGouNewLine==YES){
self.preTextField=nil;
self.isSouGouNewLine=NO;
}
if([stringisEqualToString:@"\r\r"]) {
self.isSouGouNewLine=YES;
self.preTextField= textField;
}
returnYES;
}
@end
上面代码主要就是在shouldChangeCharactersInRange，里面直接过滤不要的(产品狗说不要)，比如回车，比如搜狗的那个换行；然后textFieldDidChange里面直接监测过滤，注意拼音输入的时候先不要过滤。
另外那个搜狗换行，为什么是\r\r然后一个退格呢，处理的比较恶心，有人有更好的办法吗？
UITextView跟UITextField没什么大的区别，他对应 是下面2个事件，都不需要用户自己加监听：
-(NSString*)textViewDidChange:(UITextView*)textView;
- (BOOL)textView:(UITextView*)textView shouldChangeTextInRange:(NSRange)range replacementText:(NSString*)text;
最后说说那些过滤函数：
1.表情符号检测和过滤
+(BOOL)isContainsEmoji:(NSString*)string{
__blockBOOLisEomji =NO;
[stringenumerateSubstringsInRange:NSMakeRange(0, [stringlength])options:NSStringEnumerationByComposedCharacterSequencesusingBlock:^(NSString*substring,NSRangesubstringRange,NSRangeenclosingRange,BOOL*stop) {
constunicharhs = [substringcharacterAtIndex:0];
// surrogate pair
if(0xd800<= hs && hs <=0xdbff) {
if(substring.length>1) {
constunicharls = [substringcharacterAtIndex:1];
constintuc = ((hs -0xd800) *0x400) + (ls -0xdc00) +0x10000;
if(0x1d000<= uc && uc <=0x1f77f) {
isEomji =YES;
}
}
}else{
if(hs>=0x278b&& hs <=0x2792) {
//九宫格输入这个是中文输入法中输入字符,不能算符号。
;
}
// non surrogate
elseif(0x2100<= hs && hs <=0x27ff&& hs !=0x263b) {
isEomji =YES;
}elseif(0x2B05<= hs && hs <=0x2b07) {
isEomji =YES;
}elseif(0x2934<= hs && hs <=0x2935) {
isEomji =YES;
}elseif(0x3297<= hs && hs <=0x3299) {
isEomji =YES;
}elseif(hs ==0xa9|| hs ==0xae|| hs ==0x303d|| hs ==0x3030|| hs ==0x2b55|| hs ==0x2b1c|| hs ==0x2b1b|| hs ==0x2b50|| hs ==0x231a) {
isEomji =YES;
}
if(!isEomji && substring.length>1) {
constunicharls = [substringcharacterAtIndex:1];
if(ls ==0x20e3) {
isEomji =YES;
}
}
}
}];
returnisEomji;
}
+(NSString*)removeEmoji:(NSString*)string{
[***RulessharedManager].noEomji=@"";
[stringenumerateSubstringsInRange:NSMakeRange(0, [stringlength])options:NSStringEnumerationByComposedCharacterSequencesusingBlock:^(NSString*substring,NSRangesubstringRange,NSRangeenclosingRange,BOOL*stop) {
BOOLisEomji =NO;
constunicharhs = [substringcharacterAtIndex:0];
// surrogate pair
if(0xd800<= hs && hs <=0xdbff) {
if(substring.length>1) {
constunicharls = [substringcharacterAtIndex:1];
constintuc = ((hs -0xd800) *0x400) + (ls -0xdc00) +0x10000;
if(0x1d000<= uc && uc <=0x1f77f) {
isEomji =YES;
}
}
}else
{
if(hs>=0x278b&& hs <=0x2792) {
//九宫格输入这个是中文输入法中输入字符,不能算符号。
;
}
// non surrogate
elseif(0x2100<= hs && hs <=0x27ff&& hs !=0x263b) {
isEomji =YES;
}elseif(0x2B05<= hs && hs <=0x2b07) {
isEomji =YES;
}elseif(0x2934<= hs && hs <=0x2935) {
isEomji =YES;
}elseif(0x3297<= hs && hs <=0x3299) {
isEomji =YES;
}elseif(hs ==0xa9|| hs ==0xae|| hs ==0x303d|| hs ==0x3030|| hs ==0x2b55|| hs ==0x2b1c|| hs ==0x2b1b|| hs ==0x2b50|| hs ==0x231a) {
isEomji =YES;
}
if(!isEomji && substring.length>1) {
constunicharls = [substringcharacterAtIndex:1];
if(ls ==0x20e3) {
isEomji =YES;
}
}
}
if(!isEomji) {
[***RulessharedManager].noEomji= [NSStringstringWithFormat:@"%@%@",[***RulessharedManager].noEomji,substring];
}
}];
return[***RulessharedManager].noEomji;
}
2.名称、备注判断-过滤
+ (BOOL) validateName:(NSString*)name
{
if(name.length<=0) {
returnYES;
}
if([selfisContainsEmoji:name]) {
returnNO;
}
NSString*nameRegex =@"[0-9a-zA-Z\u4e00-\u9fa5\u278b-\u2792\\)\\(\\\\.-]+";
NSPredicate*passWordPredicate = [NSPredicatepredicateWithFormat:@"SELF MATCHES %@",nameRegex];
return[passWordPredicateevaluateWithObject:name];
}
+(BOOL)validateRemark:(NSString*)sText{
if(sText.length<=0) {
returnYES;
}
if([selfisContainsEmoji:sText]) {
returnNO;
}
//
NSString*nameRegex =@"[0-9a-zA-Z\u4e00-\u9fa5\u278b-\u2792\\.\\*\\)\\(\\+\\$\\[\\?\\\\\\^\\{\\|\\]\\}\\-%%%@\r\t\'\",。‘、-【】·！_——=:;；<>《》‘’“”!#~]+";
NSPredicate*passWordPredicate = [NSPredicatepredicateWithFormat:@"SELF MATCHES %@",nameRegex];
return[passWordPredicateevaluateWithObject:sText];
}
+(NSString*)removeOtherChar:(NSString*)string WithChars:(NSString*)rule{
[***RulessharedManager].noEomji=@"";
[stringenumerateSubstringsInRange:NSMakeRange(0, [stringlength])options:NSStringEnumerationByComposedCharacterSequencesusingBlock:^(NSString*substring,NSRangesubstringRange,NSRangeenclosingRange,BOOL*stop) {
NSPredicate*passWordPredicate = [NSPredicatepredicateWithFormat:@"SELF MATCHES %@",rule];
BOOLisValidate = [passWordPredicateevaluateWithObject:substring];
if(isValidate) {
[***RulessharedManager].noEomji= [NSStringstringWithFormat:@"%@%@",[***RulessharedManager].noEomji,substring];
}
}];
return[***RulessharedManager].noEomji;
}