本文介绍了一个简单的iOS应用案例，当用户开始编辑UITextField时，视图会向上移动以防止键盘遮挡输入框；当用户结束编辑时，视图恢复原位。这种方法可以改善用户体验，尤其是在长屏设备上。
- (void)textFieldDidBeginEditing:(UITextField *)textField
{
self.view.frame = CGRectMake (0,-100,self.view.frame.size.width, self.view.frame.size.height);
}
- (void)textFieldDidEndEditing:(UITextField *)textField
{
self.view.frame = CGRectMake (0,0,self.view.frame.size.width, self.view.frame.size.height);
}
{
self.view.frame = CGRectMake (0,-100,self.view.frame.size.width, self.view.frame.size.height);
}
- (void)textFieldDidEndEditing:(UITextField *)textField
{
self.view.frame = CGRectMake (0,0,self.view.frame.size.width, self.view.frame.size.height);
}
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