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滚动到scrollview/scrollview中的特定文本字段当键盘在屏幕上时停止滚动

scrollview iphone

3

Ankit Sachan · 技术社区 · 16 年前

我被困在这里,

为了防止这种情况发生,我按照UICatalog示例进行了如下操作

-(void)textFieldDidBeginEditing:(UITextField *)sender
{

if (sender.frame.origin.y>109) {
    moveScrollViewUpBy=(sender.frame.origin.y-109+10);

    [self viewMovedUp:YES];
}
}


-(void)viewMovedUp:(BOOL)movedUp
{
[UIView beginAnimations:nil context:NULL];
[UIView setAnimationDuration:0.3];

CGRect rect = formScrollView.frame;
if (movedUp)
{
    if(rect.origin.y == 0.0f){
        rect.origin.y -= kOFFSET_FOR_KEYBOARD;
        rect.size.height += kOFFSET_FOR_KEYBOARD;
    }
}
else
{
    if(rect.origin.y != 0.0f){
        rect.origin.y += kOFFSET_FOR_KEYBOARD;
        rect.size.height -= kOFFSET_FOR_KEYBOARD;
    }
}
self.formScrollView = rect;


[UIView commitAnimations];
}

#define kOFFSET_FOR_KEYBOARD    160.0

但这会将滚动视图向上移动,

我希望当我在滚动视图中点击下面的文本字段时。。。滚动视图滚动,文本字段出现。。。。

2 回复 | 直到 16 年前

1

2

Ben Gottlieb 16 年前

您可能只想设置scrollView的contentOffset属性,而不是调整其边界。

2

1

user668876 bentford 15 年前

- (void)textViewDidBeginEditing:(UITextView *)textView {

    keyboardShowing = YES; //helper ivar
    [self sizeToOrientation];
    [self.scrollView scrollRectToVisible:textView.frame animated:YES];
}

- (void)textFieldDidEndEditing:(UITextField *)textField {
    keyboardShowing = NO;
    [self sizeToOrientation];
}

助手方法:

//fit to the appropriate view sizes
- (void)sizeToOrientation {
    CGSize size;
    if( keyboardShowing )
        size = CGSizeMake(320, 190); //make room for keyboard
    else
        size = CGSizeMake(320, 420); //full height with tabbar on bottom

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

这对我很有效。