UITextView 文本垂直对齐

Question

I have created Custom UITextView class ,where textView grows dynamically as user types characters and textview frame resized dynamically.I want to align the text vertically center in the frame,it always coming to bottom by default.I added UIEdgeInsets to make or look a like it into center but it creates more issues for me.If i try to set content offset then the textView center also shifts.Is the content offset and textView center effect each other ?.I want textview center where ever it is but the text inside the textView stays vertically center. Initially i am setting UITextView font 23.0 with a rectangular border(textview frame layer border).When i start typing in that box the text is coming on bottom of the border.Then i am using

[textView setContentInset:UIEdgeInsetsMake(5,0,10,0)]; 

to make text in center. Then i have to send this text for printing which is placed on an UIImageView.Here i am using the mentioned code by Paras to match printer dpi and resizing it.But the text as looks on UIImageview doesn't match the exact placement of print because i have added UIEdgeInset to adjust vertical alignment

Answer 1

Use this category to UITextView Class: https://gist.github.com/toms972/8330377

OR

Follow the steps described in the following link: http://imagineric.ericd.net/2011/03/10/ios-vertical-aligning-text-in-a-uitextview/

Answer 2

you can try this sample https://github.com/HansPinckaers/GrowingTextView

I hope this would help you.

Answer 3

I have two types to set dynamic height to the UITextView see both are bellow...

UPDATE:

First Create UITextView programmatically like bellow...

-(IBAction)btnAddTextView:(id)sender
{
    UIView *viewTxt = [[UIView alloc]initWithFrame:CGRectMake(imgBackBoard.center.x - 100,20, 220, 84)];
    [viewTxt setBackgroundColor:[UIColor clearColor]];
    viewTxt.userInteractionEnabled = YES;

    UITextView *txtAddNote=[[UITextView alloc]initWithFrame:CGRectMake(20,20, 180, 44)];
    [txtAddNote setBackgroundColor:[UIColor scrollViewTexturedBackgroundColor]];
    [txtAddNote setFont:[UIFont fontWithName:@"Helvetica-Bold" size:15]];
    txtAddNote.layer.borderWidth = 2.0;
    txtAddNote.layer.borderColor= [UIColor redColor].CGColor;
    viewTxt.tag = 111;
    txtAddNote.tag = 111;
    txtAddNote.userInteractionEnabled= YES;
    txtAddNote.delegate = self;
    txtAddNote.textColor = [UIColor whiteColor];
    [viewTxt addSubview:txtAddNote];
    [viewBoard addSubview:viewTxt];
    [txtAddNote release];

}

First

1. This bellow Method is Delegate Method of UITextViewDelegate .

in .h class add this UITextViewDelegate and then give your textView.delegate to self like bellow..

yourTextView.delegate = self;

and use paste this bellow method...

-(BOOL)textView:(UITextView *)textView shouldChangeTextInRange:(NSRange)range replacementText:(NSString *)text
{
    textView.frame = CGRectMake(textView.frame.origin.x, textView.frame.origin.y, textView.frame.size.width, textView.contentSize.height);
    return YES;
}

here when your UITextView editing at a time with its text, the content size of textView is change.

2. Use my bellow custom Method for set Dynamic Height of UILable , UITextField and also UITextView

-(float) calculateHeightOfTextFromWidth:(NSString*) text: (UIFont*)withFont: (float)width :(UILineBreakMode)lineBreakMode
{
[text retain];
[withFont retain];
CGSize suggestedSize = [text sizeWithFont:withFont constrainedToSize:CGSizeMake(width, FLT_MAX) lineBreakMode:lineBreakMode];

[text release];
[withFont release];

return suggestedSize.height;
}

use this method like bellow...

CGSize sizeToMakeLabel = [yourTextView.text sizeWithFont:yourTextView.font]; 
yourTextView.frame = CGRectMake(yourTextView.frame.origin.x, yourTextView.frame.origin.y, 
sizeToMakeLabel.width, sizeToMakeLabel.height); 

I hope this is helpful to you :)