键盘遮挡输入框

1）将输入框的代理设置为self

（在lb文件中将输入框的delegate设置为File’s Owner 。或者使用代码textField.delegate = self;

2）将输入框所对应的ViewController.h设置实现了UITextFieldDelegate协议

在ViewController.m文件中实现UITextFieldDelegate的三个方法即可：

[cpp] view plaincopy

//开始编辑输入框的时候，软键盘出现，执行此事件

-(void)textFieldDidBeginEditing:(UITextField *)textField

{

CGRect frame = textField.frame;

int offset = frame.origin.y + 32 - (self.view.frame.size.height - 216.0);//键盘高度216

NSTimeInterval animationDuration = 0.30f;
[UIView beginAnimations:@ResizeForKeyboard context:nil];
[UIView setAnimationDuration:animationDuration];

//将视图的Y坐标向上移动offset个单位，以使下面腾出地方用于软键盘的显示
if(offset > 0)
self.view.frame = CGRectMake(0.0f, -offset, self.view.frame.size.width, self.view.frame.size.height);

[UIView commitAnimations];

}

//当用户按下return键或者按回车键，keyboard消失

-(BOOL)textFieldShouldReturn:(UITextField *)textField

{

[textField resignFirstResponder];

return YES;

}

//输入框编辑完成以后，将视图恢复到原始状态

-(void)textFieldDidEndEditing:(UITextField *)textField

{

self.view.frame =CGRectMake(0, 0, self.view.frame.size.width, self.view.frame.size.height);

}

[cpp] view plaincopy

//开始编辑输入框的时候，软键盘出现，执行此事件

-(void)textFieldDidBeginEditing:(UITextField *)textField

{

CGRect frame = textField.frame;

int offset = frame.origin.y + 32 - (self.view.frame.size.height - 216.0);//键盘高度216

NSTimeInterval animationDuration = 0.30f;
[UIView beginAnimations:@ResizeForKeyboard context:nil];
[UIView setAnimationDuration:animationDuration];

//将视图的Y坐标向上移动offset个单位，以使下面腾出地方用于软键盘的显示
if(offset > 0)
self.view.frame = CGRectMake(0.0f, -offset, self.view.frame.size.width, self.view.frame.size.height);

[UIView commitAnimations];

}

//当用户按下return键或者按回车键，keyboard消失

-(BOOL)textFieldShouldReturn:(UITextField *)textField

{

[textField resignFirstResponder];

return YES;

}

//输入框编辑完成以后，将视图恢复到原始状态

-(void)textFieldDidEndEditing:(UITextField *)textField

{

self.view.frame =CGRectMake(0, 0, self.view.frame.size.width, self.view.frame.size.height);

}