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我是用通知实现的,首先添加UITextFiled和UITextView的接收中心
[[NSNotificationCenter defaultCenter] addObserver:self selector:@selector(textViewNotifitionAction:) name:UITextViewTextDidChangeNotification object:nil];
[[NSNotificationCenter defaultCenter] addObserver:self selector:@selector(textFieldNotifitionAction:) name:UITextFieldTextDidChangeNotification object:nil];
通知调用的方法
- (void)textViewNotifitionAction:(NSNotification *)userInfo{
if (_textV.text.length>=10) {
NSString *str = [_textV.text substringToIndex:10];
_textV.text = str;
}
}
- (void)textFieldNotifitionAction:(NSNotification *)userInfo{
if (_textF.text.length>=10) {
NSString *str = [_textF.text substringToIndex:10];
_textF.text = str;
}
}
设置接收中心
NSNotificationCenter.defaultCenter().addObserver(self, selector: "textViewNotifitionAction:", name: UITextViewTextDidChangeNotification, object: nil);
NSNotificationCenter.defaultCenter().addObserver(self, selector: "textFiledNotifitionAction:", name: UITextFieldTextDidChangeNotification, object: nil);
通知调用的方法
func textViewNotifitionAction(userInfo:NSNotification){
let textVStr = textV.text as NSString;
if (textVStr.length >= 10) {
let str = textVStr.substringToIndex(10);
textV.text = str;
}
}
func textFiledNotifitionAction(userInfo:NSNotification){
let textFStr = textF.text! as NSString;
if (textFStr.length >= 10) {
let str = textFStr.substringToIndex(10);
textF.text = str;
}
}
OC & Swift中UITextFiled、UITextView限制输入字数
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原文地址:http://www.cnblogs.com/zxh-iOS/p/5902743.html