I, sorry for my english I'm not very good, I code in objective-c, I try to set text in a uiscrollview and update the content of the scrollview right after. I have a loop and I set the text with the method [uiscrollview setText:] in that loop, but the text is only displayed in the scrollview at the end of the loop...
thanks
Alex
Since when the UIScrollView has a text property?.. Do you mean UITextView?
If the loop is in main thread then the UI will probably be updated only after completing the method (with the loop inside) - just like you write. Possible solution might be to execute the method with the loop in the background thread (e.g. [self performSelectorInBackground:#selector(updateScrollViewInLoop) withObject:nil];) and inside the loop update the scroll view in the main thread ([uiscrollview performSelectorOnMainThread:#selector(setText:) withObject:text waitUntilDone:YES];).
You might also add [uiscrollview setNeedsDisplay]; line right after updating the text. I'm not sure it will help because of the second point above and, in addition, I think that this line is called in the background anyway once you change the content of the scroll view...
You first need to build your string, then call set text. Set text first clears the existing text. Also, I am assuming you mean UITextView (a subclass of UIScrollView) as it has a 'text' property. Try:
NSString *text = [NSString string];
for (NSString *line in lines)
{
text = [text stringByAppendingString:line];
}
[self.textScrollView setText:text];
Related
I am working on a simple storyboard prototype. My TableViewController uses Dynamic Prototype as Content.
I have a cell with 4 label of which two will be set in code (the label text). The height of the cell will be calculated in code too. The Line Breaks are set to Word Wrap and everything's working fine with the default values (System 17.0):
see here:
..but if I change the Font Size of the "Fantasy Street..." label it will not break any more instead it just will be cut off!
see here: with System Font 16
Lines are set to 0
Word Wrap is still active
.. I also tried to do it manually in code but no change.
Does anyone have an explanation for that?
****edited:** when I add
myLabel.frame = CGRectMake(t.origin.x, t.origin.y, t.size.width, t.size.height *2);
to the cellForRowAtIndexPath I still see the cut off label. But if I then scroll the table view so the label is outside the viewable area shortly it will be displayed with the complete text when it is visible again.
By the way, I am working with viewTags, so I don't have a dedicated Cell Class e.g. UILabel *myLabel = (UILabel *)[cell viewWithTag:2];
You should check UILabel width; the width should be less than that of the value. Then like this:
(void) viewWillLayoutSubviews {
_landPhoneTips.preferredMaxLayoutWidth = _landPhoneTips.bounds.size.width;
}
I spent hours dealing with this identical problem before finally sorting it out last evening. After changing the font size, you must select the UILabel within the storyboard and select Edit > Size to Fit Content, even if you had already previously done so! In doing so you apparently reset some setting that gets messed up when changing the font size. Once done, the UILabel will wrap as it did previously.
I create an instance of UITextView programmatically. I want to assign some text to particular line in UITextView programmatically. Here is my code to create UITextView.
UITextView *textView =[[UITextView alloc]init];
textView.frame=CGRectMake(0,0,282,210);
[textView setReturnKeyType:UIReturnKeyDone];
[self.view addSubview:textView];
For example I want to add some text to particular line (at the end of line 5).
Programmatically, how is it possible to do this?
UITextView *textView =[[UITextView alloc]init];
textView.frame=CGRectMake(0,0,282,210);
textView.text = #"xxxxxx";
...
You can't edit lines directly in the text view because the number of lines depends on the content size and the size of the font.
Check this question as a reference:
How to Read Number of lines in UITextView
You could do some calculation to determine where to insert the text, but I'm nor sure if that's the best way to go around. There is probably a better way to accomplish what you are trying to do.
you can use the following:
NSString *str=yourTextview.text;
[str stringByAppendingString:yourNewString];
Then add it to textview
yourTextView.text=str;
check it and let me know if any clarification you need
I am trying to grab the text from a dynamically created text field. I use this to make the text field become and resign first responder:
[(UITextField *)[self.view viewWithTag:0] becomeFirstResponder];
That works fine, but when I try to get the text, the app crashes.
[(UITextField *)[self.view viewWithTag:0] text];
What am I doing wrong?
Do not use the tag 0. viewWithTag: searches the view hierarchy starting from itself and since all views start with tag 0, it will identify itself as the view to be returned.
I suggest that you use a different tag on the text field.
Since the default tag for every UIView is 0, I'm going to guess that there are multiple UIViews with the same tag (tags aren't guaranteed to be unique). Instead, choose an arbitrary high value like 1000, then increment that with each view added.
Also, it would help if you included your UITextField creation code.
When writing in a UITextView more text than can fit entirely inside it, the text will scroll up and the cursor will often place itself one or two lines above the view's bottom line. This is a bit frustrating as I want my application to make good use of the entire height of the text view.
Basically what I want is to configure the UITextView to write up to it's lowest part and not use it just for scrolling.
I've seen some similar questions here, here and here. However I've not seen a proper solution yet.
Thanks
I've a slightly different implementation (I want to disable scrolling), but I also had to stop the cursor jumping out of my UITextView. To do this, I implemented a null scrollRectToVisible in my UITextView subclass. Like this:
- (void)scrollRectToVisible:(CGRect)rect animated:(BOOL)animated
{
// do nothing. This fixes the cursor jumping above the field defect.
}
excellent solution is in subclass UITextView add lines
-(void) setContentOffset:(CGPoint)contentOffset {
[self setContentInset:UIEdgeInsetsZero];
[super setContentOffset:contentOffset];
}
It's work!
use this
NSRange myRange=NSMakeRange(outPutTextView.text.length, 0);
[outPutTextView scrollRangeToVisible:myRange];
if I understand right, you can use
[textView setScrollEnabled:NO];
to disable scrolling. what about not to type when the cursor reached the lower margin... maybe it is not good solution but you can add some threshold value(maximum characters in the [textView text]) and return NO in
- (BOOL)textView:(UITextView *)textView shouldChangeTextInRange:(NSRange)range replacementText:(NSString *)text
delegate method of UITextView if [[textView text] length] > maxCharacters.
I find seem the property 'contentOffset' also can be use ...
I've got the last line by setframe :
You can setframe to about a line height
When you are editing, in - (BOOL)textView:shouldChangeTextInRange:replacementText:,use scrollRangeToVisible:,the argument is selectedRange
When you end edit, setframe to the original size
For performance reasons, I draw the strings for my UITableViewCell in a custom view that overrides its drawRect method to draw strings directly in the view rectangle using NSString:drawInRect. This is similar to Apple's TableViewSuite Example 5-CustomTableViewCell.
However, when I invoke setEditing on the cell to bring up the delete button, the view ends up with a squeezed appearance after the animation completes. To demonstrate this, invoke setEditing:YES on the CustomTableViewCell example mentioned above and observe the distortion. Is there any way around this or should I just revert back to using UILabels for my text?
I had a similar problem with a UIView inside a UITableViewCell. I solved it by changing the UIView's contentMode to UIViewContentModeLeft. (I wrote it up here, with screenshots.)
I had this problem too, and in my case I fixed it by handling the 2 states in my drawRect method, one while editting, the other while not. In other words I accounted for the size of the delete button, and got my UI to repaint the cell differently. I'm not sure if it's the most efficient way to go, but here is the code that I used to force a repaint:
-(void)_refreshTableAndCells{
//refresh the table
[myCustomTableView reloadData];
//refresh all the visible cells
for (UITableViewCell *cell in myCustomTableView.visibleCells){
LocationCellView *locationCell = [cell.contentView.subviews objectAtIndex:0];
[locationCell setNeedsDisplay];
}
}
I'm an Objective-C n00b though, so I'd be more than happy for someone to suggest a better way than this.
I usually just modify the x and width values (or whatever else) of whatever I want to be different when editing or not. UITableView automatically calls layoutSubviews when you begin editing, so you don't have to loop through your cells and do it yourself.
- (void)layoutSubviews {
[super layoutSubviews];
CGFloat editingPadding = 5.0;
self.textLabel = CGRectMake((self.editing ? self.textLabel.frame.origin.x + editingPadding : self.textLabel.frame.origin.x), self.textLabel.origin.y, (self.editing ? self.textLabel.frame.size.width - editingPadding : self.textLabel.frame.size.width), self.textLabel.frame.size.height);
}
Try setting the contentMode of your own custom view (which resides inside the cell's contentView) to UIViewContentModeLeft. The "squeezing" is due to the fact that the default contentMode is UIViewContentModeScaleToFill.