如何不让键盘挡住UITextField控件
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参考:
苹果的官方参考
http://www.apple.com.cn/developer/iphone/library/documentation/iPhone/Conceptual/iPhoneOSProgrammingGuide/TextandWeb/TextandWeb.html#//apple_ref/doc/uid/TP40007072-CH20-SW3
方法一:
http://blog.163.com/joke_001/blog/static/191753316201182522223307/
当textViewShouldBeginEditing时候,
用setContentOffset函数
{
NSLog(@" begin editing ");
[postScrollView setContentOffset:CGPointMake(0, 150) animated:YES];
return YES;
}
//写完之后 在某一个事件方法中(如:发送的方法)取消焦点:[postTextView resignFirstResponder]; 接下来会自动运行一下委托:
- (void)textViewDidEndEditing:(UITextView *)textView
{
NSLog(@" did end editing ");
[postScrollView setContentOffset:CGPointMake(0.0, 0.0) animated:YES];
}
UITapGestureRecognizer *tapGestureRecognizer = [[UITapGestureRecognizer alloc] initWithTarget:self action:@selector(hideKeyBoard:)];
tapGestureRecognizer.numberOfTapsRequired = 1;
[myScrollView addGestureRecognizer: tapGestureRecognizer]; //只需要点击非文字输入区域就会响应hideKeyBoard
- (void)hideKeyBoard:(id)sender
{
[myTextView resignFirstResponder];
//or [myTextField resignFirstResponder];
}
上移代码:
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;
CGRect rect=CGRectMake(0.0f,-80,width,height);//上移80个单位,按实际情况设置
self.view.frame=rect;
[UIView commitAnimations];
下移类同,把frame还原即可。
方法二:
http://blog.csdn.net/silva_831/article/details/7074762
实现以下三个方法,如果弹出的键盘会遮住输入框 ,整体的界面会向上移动,这样就不会遮住输入框了。自己增加UITextFieldDelegate委托。
只适合iPhone,如果想要支持iPad,只要把216改成iPad上面键盘的高度即可。
C代码
- (void)keyboardWillShow:(NSNotification *)noti
{
//键盘输入的界面调整
//键盘的高度
float height = 216.0;
CGRect frame = self.view.frame;
frame.size = CGSizeMake(frame.size.width, frame.size.height - height);
[UIView beginAnimations:@"Curl"context:nil];//动画开始
[UIView setAnimationDuration:0.30];
[UIView setAnimationDelegate:self];
[self.view setFrame:frame];
[UIView commitAnimations];
}
- (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 + 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];
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];
}
在实际用的时候,键盘消失原来的控件并没有回归都原来的位置,而是上移了20个像素,我估计是因为顶部Bar的原因,只要将22行代码改成如下就可以了:
CGRect rect = CGRectMake(0.0f, 20.0f, self.view.frame.size.width, self.view.frame.size.height);
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