IOS Uiwenview Adjust page font size

IOS Uiwenview Adjust page font size

IOS uiwenview Adjust the page font size, as shown in the following example:

FontSizeChangeViewController.h

#import <UIKit/UIKit.h> @interface fontsizechangeviewcontroller:uiviewcontroller{    uitoolbar *toolbar;} @property (Weak, nonatomic) Iboutlet UIWebView *webdetails; @end

Fontsizechangeviewcontroller.m

#import "FontSizeChangeViewController.h" #define K_font_size_change_web_url @ "http://3g.fx678.com/news/detail/ 201508031037021902 "#define K_font_size_change_key @" Ont_size_change_view_size "@interface Fontsizechangeviewcontroller () @end @implementation fontsizechangeviewcontroller-(void) Viewdidload {[Super    Viewdidload]; [Self initview];}    -(void) didreceivememorywarning {[Super didreceivememorywarning]; Dispose of any resources the can be recreated.} #pragma mark-custom method-(void) initview{//[s] Load Web page nsurl *url = [[Nsurl alloc] Initwithstring:k_font_size_chan    Ge_web_url];    Adaptive page size, support zoom self.webDetails.scalesPageToFit = YES;    [Self.webdetails loadrequest:[nsurlrequest Requestwithurl:url];    [E] Load page//[s] Set toolbar cgsize cgsize = self.navigationController.toolbar.frame.size; if (!toolbar) ToolBar = [[Uitoolbar alloc] Initwithframe:cgrectmake (0, Self.view.frame.size.height-cgsize.height,    Cgsize.width, Cgsize.height)];    Font Magnification buttonUibarbuttonitem *barbtnadd = [[Uibarbuttonitem alloc] initwithtitle:@ "Font size +" Style:uibarbuttonitemstyleplain target:    Self action: @selector (Btnfontsizechange:)];    Barbtnadd.tag = 1;  Font Zoom Out button Uibarbuttonitem *barbtnsmall = [[Uibarbuttonitem alloc] initwithtitle:@ "Font Size-" style:uibarbuttonitemstyleplain    Target:self Action: @selector (Btnfontsizechange:)];    Barbtnadd.tag = 2;    Nsarray *arrbtns = [Nsarray arraywithobjects:barbtnadd,barbtnsmall, Nil];    [ToolBar Setbarstyle:uibarstyledefault];    Toolbar.autoresizingmask = Uiviewautoresizingflexibletopmargin;    [ToolBar Setitems:arrbtns Animated:yes];    [Self.view Addsubview:toolbar]; [E] Set toolbar}//font size change-(void) Btnfontsizechange: (Uibarbuttonitem *) sender{Nsinteger fontSize = [[Nsuserdefaults]    Standarduserdefaults] Integerforkey:k_font_size_change_key]; if (!fontsize) {//default 18px [[Nsuserdefaults standarduserdefaults] setinteger:18 Forkey:k_font_size_change_key]        ; FontSize = [[Nsuserdefaults standarduserDefaults] Integerforkey:k_font_size_change_key];    } nsstring *strfontsize = nil;    if (sender && [sender.title isequaltostring:@ "size +"]) fontSize + = 2;    else if (sender && [sender.title isequaltostring:@ "Font Size-"]) fontSize-= 2;    Strfontsize = [NSString stringwithformat:@ "document.body.style.fontSize = '%ldpx ';", (long) fontSize];    [Self.webdetails stringbyevaluatingjavascriptfromstring:strfontsize]; Update value [[Nsuserdefaults standarduserdefaults] setinteger:fontsize Forkey:k_font_size_change_key];} @end

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IOS Uiwenview Adjust page font size