NSInteger length = 15;
NSString *toBeString = textfield.text;
NSString *lang = [[UIApplication sharedApplication]textInputMode].primaryLanguage; // 键盘输入模
if ([lang isEqualToString:@"zh-Hans"]) { // 简体中文输入,包括简体拼音,健体五笔,简体手写
UITextRange *selectedRange = [textfield markedTextRange];
//获取高亮部分
UITextPosition *position = [textfield positionFromPosition:selectedRange.start offset:0];
// 没有高亮选择的字,则对已输入的文字进行字数统计和限制
if (!position) {
if (toBeString.length > length){
NSRange rangeIndex = [toBeString rangeOfComposedCharacterSequenceAtIndex:length];
if (rangeIndex.length == 1){
textfield.text = [toBeString substringToIndex:length];
}
else{
NSRange rangeRange = [toBeString rangeOfComposedCharacterSequencesForRange:NSMakeRange(0, length)];
textfield.text = [toBeString substringWithRange:rangeRange];
}
}
}
} else{ // 中文输入法以外的直接对其统计限制即可,不考虑其他语种情况
if (toBeString.length > length){
NSRange rangeIndex = [toBeString rangeOfComposedCharacterSequenceAtIndex:length];
if (rangeIndex.length == 1){
textfield.text = [toBeString substringToIndex:length];
}else{
NSRange rangeRange = [toBeString rangeOfComposedCharacterSequencesForRange:NSMakeRange(0,length)];
textfield.text = [toBeString substringWithRange:rangeRange];
}
}
}
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