"Code note" to get text height after rich text settings

One.

Two, engineering drawings.

Three, code.

RootViewController.h

#import <UIKit/UIKit.h> @interface Rootviewcontroller:uiviewcontroller@end

Rootviewcontroller.m

#import "RootViewController.h" @interface Rootviewcontroller () @end @implementation rootviewcontroller-(ID) Initwithnibname: (NSString *) Nibnameornil Bundle: (NSBundle *) nibbundleornil{self = [Super Initwithnibname:    Nibnameornil Bundle:nibbundleornil]; if (self) {//Custom initialization} return to self;}    -(void) viewdidload{[Super Viewdidload];        Do any additional setup after loading the view.   Initialize interface [self addview];    } #pragma-mark-functions//initialization interface-(void) addview{//text UILabel *datalabel = [[UILabel alloc] init];    Datalabel.backgroundcolor = [Uicolor Orangecolor];    Datalabel.text = @ "I am text text text text text text literal text literal text 11111111111111111111111111111111111";    Datalabel.textcolor = [Uicolor Redcolor];    Datalabel.font = [Uifont fontwithname:@ "Arial" size:14];    Datalabel.numberoflines = 0;        [Self.view Addsubview:datalabel];    Rich Text set text line spacing Nsmutableparagraphstyle *paragraphstyle = [[Nsmutableparagraphstyle alloc]init]; Paragraphstyle.linespacing = 4; Nsdictionary *attributes = @{Nsfontattributename:[uifont systemfontofsize:14], Nsparagraphstyleattributename:    Paragraphstyle};        Datalabel.attributedtext = [[nsattributedstring alloc]initwithstring:datalabel.text attributes:attributes]; Gets the height of the set text spacing after cgrect fram = [Datalabel.attributedtext boundingrectwithsize:cgsizemake (maxfloat) options:        Nsstringdrawinguseslinefragmentorigin Context:nil]; Datalabel.frame=cgrectmake (fram.size.height);}    -(void) didreceivememorywarning{[Super didreceivememorywarning]; Dispose of any resources the can be recreated.}

"Code note" to get text height after rich text settings