iOS：textfield切换显隐时发生的问…

来源：互联网发布：js中获取元素的属性值编辑：程序博客网时间：2024/06/06 10:05

问题1:切换显隐时，光标会错位的问题

解决办法1:

NSString *string =self.passwordTextField.text; //切换内容后可以从新定位光标位置

self.passwordTextField.text=@"";

self.passwordTextField.text = string;

解决办法2:

textField.enabled= NO; //切换内容后可以从新定位光标位置效果同上

textField.secureTextEntry = YES;

textField.enabled = YES;

[textFieldbecomeFirstResponder];

问题2:切换显隐时，继续输入会将之前的内容清空

解决办法:

#pragma mark---textField代理方法---

//为textfield从新赋值没有此代理方法则切换显隐后内容会被清空

- (BOOL)textField:(UITextField*)textField shouldChangeCharactersInRange: (NSRange)rangereplacementString:(NSString*)string

{

if ([string isEqualToString:@" "]) { //不能输入空格

returnNO;

}

//如果是删除键并且内容长度大于0

if([string isEqualToString:@""]&& self.passwordTextField.text.length>0){

NSString*stringtemp = [self.passwordTextField.textsubstringToIndex:self.passwordTextField.text.length-1];

self.passwordTextField.text= stringtemp;

returnNO;

}

NSString*stringTemp = [NSStringstringWithFormat:@"%@%@",textField.text,string];

self.passwordTextField.text= stringTemp;

return NO;

}

0 0