Llabel finishing in iOS

· Uilable is the most basic control of the iphone interface and is used primarily to display textual information.
• Common Properties and methods are:
1. Create
CGRect rect = CGRectMake (100, 200, 50, 50);
UILabel *label = [[UILabel alloc] initwithframe:rect];
2, text//set and read content, default to nil
Label.text = @ "text message"; Set content
NSLog (@ "%@", Label.text); Read content
3, TextColor//Set text color, default to Black
Lable.textcolor = [Uicolor Redcolor];
4, Font//Set the size of fonts, default 17
Label.font = [Uifont systemfontofsize:20]; ? general methods
Label.font = [Uifont boldsystemfontofsize:20]; Bold method
Label.font = [Uifont fontwithname:@ "Arial" size:16]; Specified
Method of Font
What's more? A way to import fonts from outside.
5, TextAlignment//Set label text alignment.
Label.textalignment = Nstextalignmentcenter; And also
Nstextalignmentleft, Nstextalignmentright.
6, NumberOfLines//tags display up to a maximum number of rows, or 0 for multiple lines.
Label.numberoflines = 2;
7, Enabled//only determines the way the label is drawn, set it
No will darken the text, indicating that it is not active, and setting a color value to it is not valid.
label.enable = NO;
8, highlighted//whether highlighting
label.highlighted = YES;
Label.highlightedtextcolor = [Uicolor Orangecolor]; Highlight
Text color when displayed
9, Shadowcolor//Set Shadow Color
[Label Setshadowcolor:[uicolor Blackcolor];
10, Shadowoffset//Set shadow Offset
[Label Setshadowoffset:cgsizemake (-1,-1)];
11, Baselineadjustment//If the Adjustsfontsizetofitwidth property is set
Set to Yes, this property controls the behavior of the text baseline.
Label.baselineadjustment = Uibaselineadjustmentnone;
Uibaselineadjustmentalignbaselines = 0, default, the top of the text is aligned with the centerline.
Uibaselineadjustmentaligncenters, the middle of the text is aligned with the label centerline.
Uibaselineadjustmentnone, the lowest end of the text is aligned with the label centerline.
12, autoshrink//whether automatic contraction
Fixed Font Size default, text size does not scale automatically if label width is less than text length
Minimumscalefactor sets the minimum shrinkage scale, if the label width is less than the text length, the text
Shrinks, shrinks beyond the proportions, and then stops shrinking.
Minimumfontsize sets the minimum shrink size, if the label width is less than the text length, the text size
Decrease, lower than the set font size, no longer decreases. 6.0 were no longer used later.
Label.minimumscalefactor = 0.5;
13, Adjustsletterspacingtofitwidth//change the spacing between letters to fit the label size
Mylabel.adjustsletterspacingtofitwidth = NO;
14, Linebreakmode//Set the display format when the text is too long
Label.linebreakmode = nslinebreakbycharwrapping; display units in characters
The following section is omitted.
Label.linebreakmode = nslinebreakbyclipping; cut in the same width as the text
The second part is removed.
Label.linebreakmode = nslinebreakbytruncatinghead; Front part text
To...... method is omitted, displaying the trailing text content.
Label.linebreakmode = nslinebreakbytruncatingmiddle; content in the middle
To...... The method is omitted, showing the text content of the kinsoku.
Label.linebreakmode = Nslinebreakbytruncatingtail; the contents of the ending section
To...... Method omitted to display the text content of the header.
Label.linebreakmode = nslinebreakbywordwrapping; display units in words
The following section is omitted.
15. Adjustsfontsizetofitwidth//Set font size to fit label width
Label.adjustsfontsizetofitwidth = YES;
16. Attributedtext: Sets the Label property text.
NSString *text = @ "First";
Nsmutableattributedstring *textlabelstr =
[[Nsmutableattributedstring Alloc]
Initwithstring:text];
[Textlabelstr
Setattributes:@{nsforegroundcolorattributename:
[Uicolor Lightgraycolor], Nsfontattributename:
[Uifont Systemfontofsize:17]} Range:nsmakerange (11,
10)];
Label.attributedtext = Textlabelstr;
17, vertical text display each text plus a line break, this is the most convenient and simple implementation.
Label.text = @ "please \ \ \ \ \ \ \ \ \ \ \ \ \ \"
Label.numberoflines = [Label.text length];

18, calculate the height of the Uilabel with the font after multiple lines
CGRect bounds = CGRectMake (0, 0, 200, 300);
Heightlabel = [MyLabel textrectforbounds:bounds
LIMITEDTONUMBEROFLINES:20]; The frame that calculates the label after 20 lines
NSLog (@ "%f", heightLabel.size.height);
19, Uilabel According to the number of words automatically realize the height of adaptation
UILabel *msglabel = [[UILabel alloc]
Initwithframe:cgrectmake (15, 45, 0, 0)];
Msglabel.backgroundcolor = [Uicolor Lighttextcolor];
[Msglabel setnumberoflines:0];
Msglabel.linebreakmode = Uilinebreakmodewordwrap;
Msglabel.font = [Uifont fontwithname:@ "Arial" size:12];
Cgsize size = Cgsizemake (290, 1000);
Msglabel.text = @ "Get the Devicetoken, we can use the WebService service to raise
to a. NET application, where I simply process it, print it directly, and copy it into a. NET application environment so that
Use. ";
Cgsize Msgsie = [Msglabel.text sizewithfont:fonts
Constrainedtosize:size];
[Msglabel setframe:cgrectmake (290, msgsie.height)];

20. Gradient Font Label
Uicolor *titlecolor = [Uicolor colorwithpatternimage:[uiimage
imagenamed:@ "Btn.png"];
NSString *title = @ "Setting";
UILabel *titlelabel = [[UILabel alloc]
Initwithframe:cgrectmake (0, 0, 80, 44)];
Titlelabel.textcolor = Titlecolor;
Titlelabel.text = title;
Titlelabel.font = [Uifont boldsystemfontofsize:20];
Titlelabel.backgroundcolor = [Uicolor Clearcolor];
[Self.view Addsubview:titlelabel];
[Titlelabel release];
21. Label Add border
TitleLabel.layer.borderColor = [[Uicolor graycolor] cgcolor];
TitleLabel.layer.borderWidth = 2;

One important point: 1,uilinebreakmodewordwrap

  
 
 typedef enum {
   Uilinebreakmodewordwrap = 0, 
  uilinebreakmodecharacterwrap, 
  uilinebreakmodeclip, 
  uilinebreakmodeheadtruncation, 
  uilinebreakmodetailtruncation, 
   Uilinebreakmodemiddletruncation, 
} uilinebreakmode; 
 
 
  uilinebreakmodewordwrap = 0, 
   line wrapping in words, truncated in units. 
  uilinebreakmodecharacterwrap, 
   line wrapping in characters, truncated in characters. 
  uilinebreakmodeclip, 
   line wrapping in words. truncated in characters. 
  uilinebreakmodeheadtruncation, 
   line wrapping in words. If it is a single line, the start part has an ellipsis. If it is multiple lines, there is an ellipsis in the middle, and the ellipsis is followed by 4 characters. 
  uilinebreakmodetailtruncation, 
   line wrapping in words. Whether it is a single line or multiple lines, there is an ellipsis at the end. 
  uilinebreakmodemiddletruncation, 
   line wrapping in words. Whether it is a single line or multiple lines, there is an ellipsis in the middle, and only 2 characters after the ellipsis. 
  
 
  

2, Cgrectzero: cgrectzero equivalent to CGRectMake (0, 0, 0, 0), personal understanding, using this can change some properties of view after

3, the realization of the bubble view: Uiimageview *bubbleimageview = [[Uiimageview alloc] Initwithimage:[bubble Stretchableimagewithleftcapwidth:21 topcapheight:14]; Stretch view according to the picture

4, based on the font size, and the text displayed, to calculate the desired size: Gets the actual height and width of the string that is required within the specified size (the width is more than 150, the line is wrapped).

Uifont *font = [Uifont systemfontofsize:13];
Cgsize size = [text Sizewithfont:font constrainedtosize:cgsizemake (150.0f, 1000.0f) Linebreakmode: Uilinebreakmodewordwrap];
NSLog (@ "Font zize%f,%f", size.width,size.height);

Llabel finishing in iOS