UITextView实现点击编辑框整体视图上移动，取消编辑恢复原来状态
// 原理很简单，一看代码就懂。 直接上代码
//.h
@interface MainViewController : UIViewController <UITextViewDelegate,UIGestureRecognizerDelegate> {
BOOL _up;
UIImageView *_imageView;
UITextView *_txtView;
}
@end
//.m
- (void)viewDidLoad
{
[super viewDidLoad];
// Do any additional setup after loading the view.
//点击事件
UITapGestureRecognizer *single = [[UITapGestureRecognizer alloc] initWithTarget:self action:@selector(singleGestureCaptured:)];
[single setNumberOfTapsRequired:1];
single.delegate = self;
[self.view addGestureRecognizer:single];
float fOrgY = 40.0;
float fwidth = self.view.bounds.size.width;
float fheight = 200.0;
_imageView = [[UIImageView alloc] initWithFrame:CGRectMake(0, fOrgY, fwidth, fheight)];
[_imageView setBackgroundColor:[UIColor clearColor]];
[self.view addSubview:_imageView];
_txtView = [[UITextView alloc] initWithFrame:CGRectMake(0, fOrgY + fheight + 5, fwidth, 40.0)];
_txtView.layer.cornerRadius = 6.0;
_txtView.delegate = self;
_txtView.scrollEnabled = NO;
_txtView.returnKeyType = UIReturnKeyDone; //把默认的“换行”按钮换成“完成”按钮
_txtView.textColor = [UIColor blackColor];
[_txtView setBackgroundColor:[UIColor whiteColor]];
[self.view addSubview:_txtView];
}
- (void) setMySize {
if (_up) {
float YOffset = -40.0;
CGRect frame = _imageView.frame;
frame.origin.y += YOffset;
_imageView.frame = frame;
frame = _txtView.frame;
frame.origin.y += YOffset;
_txtView.frame = frame;
}
else {
float YOffset = 40.0;
CGRect frame = _imageView.frame;
frame.origin.y += YOffset;
_imageView.frame = frame;
frame = _txtView.frame;
frame.origin.y += YOffset;
_txtView.frame = frame;
}
}
- (BOOL)gestureRecognizer:(UIGestureRecognizer *)gestureRecognizer shouldReceiveTouch:(UITouch *)touch {
if ([touch.view isKindOfClass:[UIButton class]]) {
return NO;
}
return YES;
}
- (void)singleGestureCaptured:(UITapGestureRecognizer *)gesture {
if (_up) {
_up = !_up;
[self setMySize];
}
[_txtView resignFirstResponder];
}
#pragma mark UITextViewDelegate
//点击了编辑框，视图整体上移动40像素
- (void)textViewDidBeginEditing:(UITextView *)textView {
if (textView == _txtView) {
if (!_up) {
_up = !_up;
[self setMySize];
}
}
}
// 捕获按下"完成"按钮事件
- (BOOL)textView:(UITextView *)textView shouldChangeTextInRange:(NSRange)range replacementText:(NSString *)text{
if ([text isEqualToString:@"\n"]) {
[textView resignFirstResponder];
if (_up) {
_up = !_up;
[self setMySize];
}
return NO;
}
return YES;
}