[iOS]解决键盘弹出时挡住输入框的问题

来源：互联网发布：矩阵分析引论视频编辑：程序博客网时间：2024/05/21 16:46

做ios的时候总会遇到这样打问题：用户点了文本输入框之后键盘遮挡住了原来输入的位置。

为了解决这个问题，具体需要一下几步：

1.给当前的UIViewController添加委托

@interface SignupViewController : UIViewController<UITextFieldDelegate>

2.在xib或storyboard里面将textfield的delegate与controller相连

3.在m文件里实现委托的方法

- (BOOL)textFieldShouldReturn:(UITextField *)textField {            // When the user presses return, take focus away from the text field so that the keyboard is dismissed.            NSTimeInterval animationDuration = 0.30f;            [UIView beginAnimations:@"ResizeForKeyboard" context:nil];            [UIView setAnimationDuration:animationDuration];            CGRect rect = CGRectMake(0.0f, 0.0f, self.view.frame.size.width, self.view.frame.size.height);            self.view.frame = rect;            [UIView commitAnimations];            [textField resignFirstResponder];    return YES;        }- (void)textFieldDidBeginEditing:(UITextField *)textField{                CGRect frame = textField.frame;        int offset = frame.origin.y + frame.size.height - (self.view.frame.size.height - 216.0);//键盘高度216        NSTimeInterval animationDuration = 0.30f;                        [UIView beginAnimations:@"ResizeForKeyBoard" context:nil];                        [UIView setAnimationDuration:animationDuration];        float width = self.view.frame.size.width;                        float height = self.view.frame.size.height;                if(offset > 0)        {                CGRect rect = CGRectMake(0.0f, -offset,width,height);                                self.view.frame = rect;                }                [UIView commitAnimations];                }

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