淮安哪个做网站好点,网站如何建立,个人网站设计流程图,海口市住房和城乡建设局网站https://www.jianshu.com/p/5227e6aab4d4 2017.02.27 13:08* 字数 146 阅读 6109评论 6喜欢 14 又遇到输入框输入表情的情况了#xff0c;之前写了一篇文章“UITextView/UITextField检测并过滤Emoji表情符号”http://www.jianshu.com/p/90d68e7e5d53,但是总觉得那两种方式都各… https://www.jianshu.com/p/5227e6aab4d4 2017.02.27 13:08* 字数 146 阅读 6109评论 6喜欢 14 又遇到输入框输入表情的情况了之前写了一篇文章“UITextView/UITextField检测并过滤Emoji表情符号”http://www.jianshu.com/p/90d68e7e5d53,但是总觉得那两种方式都各有弊端这次又遇到之后仔细考虑了下之后想到了用两种方式组合在一起使用测试结果暂时没什么问题在输入时就限制了emoji表情输入完全符合需求。在此贴出代码如果有什么问题欢迎指正 interface JQTestViewController ()UITextFieldDelegate property (weak, nonatomic) IBOutlet UITextField *textField; property (nonatomic, assign) NSInteger textLocation;//这里声明一个全局属性用来记录输入位置 end - (void)viewDidLoad { [super viewDidLoad]; self.textField.delegate self; [self.textField addTarget:self action:selector(textFieldDidChanged:) forControlEvents:UIControlEventEditingChanged];//注意textFied没有textFieldDidChanged代理方法但是有UITextFieldTextDidChangeNotification通知这里添加通知方法textView有textFieldDidChanged代理方法下面用法一样 } #pragma mark-- UITextFieldDelegate //在输入时调用下面那个方法来判断输入的字符串是否含有表情 - (void)textFieldDidChanged:(UITextField *)textField { if (textField.text.length 20) { textField.text [textField.text substringToIndex:20]; [self showMessage:不可超过20字]; }else { if (self.textLocation -1) { NSLog(输入不含emoji表情); }else { NSLog(输入含emoji表情); //截取emoji表情前 textField.text [textField.text substringToIndex:self.textLocation]; } } } - (BOOL)textField:(UITextField *)textField shouldChangeCharactersInRange:(NSRange)range replacementString:(NSString *)string { NSLog(location--%lu,(unsigned long)range.location); NSLog(replacementString--%,string); //禁止输入emoji表情 if ([self stringContainsEmoji:string]) { self.textLocation range.location; }else { self.textLocation -1; } return YES; } //表情符号的判断 - (BOOL)stringContainsEmoji:(NSString *)string { __block BOOL returnValue NO; [string enumerateSubstringsInRange:NSMakeRange(0, [string length]) options:NSStringEnumerationByComposedCharacterSequences usingBlock:^(NSString *substring, NSRange substringRange, NSRange enclosingRange, BOOL *stop) { const unichar hs [substring characterAtIndex:0]; if (0xd800 hs hs 0xdbff) { if (substring.length 1) { const unichar ls [substring characterAtIndex:1]; const int uc ((hs - 0xd800) * 0x400) (ls - 0xdc00) 0x10000; if (0x1d000 uc uc 0x1f77f) { returnValue YES; } } } else if (substring.length 1) { const unichar ls [substring characterAtIndex:1]; if (ls 0x20e3) { returnValue YES; } } else { if (0x2100 hs hs 0x27ff) { returnValue YES; } else if (0x2B05 hs hs 0x2b07) { returnValue YES; } else if (0x2934 hs hs 0x2935) { returnValue YES; } else if (0x3297 hs hs 0x3299) { returnValue YES; } else if (hs 0xa9 || hs 0xae || hs 0x303d || hs 0x3030 || hs 0x2b55 || hs 0x2b1c || hs 0x2b1b || hs 0x2b50) { returnValue YES; } } }]; return returnValue; } 转载于:https://www.cnblogs.com/sundaysgarden/p/10312844.html
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