ios - How to programmatically display a view -- with an "x" button to close the view? -

-

i trying programmatically display view containing image , "x" button -- in code labeled *btndismiss -- close view.

here issue: code display image , "x" button. however, clicking "x" button doesn't close view -- both image , "x" button remain visible.

i'm new xcode, please provide verbose responses (if leave out answer, might not able fill in blanks!)

note: if have solution how show imageview "x" button make both imageview , "x" button disappear, welcome.

here code:

#import "xyzviewcontroller.h"  @interface xyzviewcontroller ()  @end  @implementation xyzviewcontroller  - (void)viewdidload {     [super viewdidload];     // additional setup after loading view, typically nib.      uiviewcontroller *vc = [[uiviewcontroller alloc] init];     [self presentviewcontroller:vc animated:yes completion:nil];      uiimageview *bgimage = [[uiimageview alloc] initwithframe:cgrectmake(5, 5, 200, 200)];     bgimage.image = [uiimage imagenamed:@"image"];     [self.view addsubview:bgimage];      uibutton *btndismiss = [[uibutton alloc] initwithframe:cgrectmake(10, 10, 100, 100)];     [btndismiss settitlecolor:[uicolor blackcolor] forstate:uicontrolstatenormal];     [btndismiss settitle:@"x" forstate:uicontrolstatenormal];     [btndismiss addtarget:self action:@selector(dismissvc:) forcontrolevents:uicontroleventtouchupinside];     [self.view addsubview:btndismiss]; }  -(void)dismissvc:(id)sender {     [self dismissviewcontrolleranimated:yes completion:nil]; }

thanks in advance!

your code set dismiss view controller presented modally. views want remove subviews of self.view.

you can remove uiimageview , uibutton keeping outlets them , calling removefromsuperview in remove method. method, don't need present or dismiss view controller.

-(void)removeviews:(id)sender {     [self.xbutton removefromsuperview];     [self.imageview removefromsuperview]; }

edit in response comment

you'll need have properties declared xbutton , imageview

@property uibutton *xbutton; @property uiimageview *imageview;

edit show full code

@interface mjnviewcontroller () @property uibutton *xbutton; @property uiimageview *imageview; @end  @implementation mjnviewcontroller  - (void)viewdidload {     [super viewdidload];      self.imageview = [[uiimageview alloc] initwithframe:cgrectmake(5, 5, 200, 200)];     self.imageview.image = [uiimage imagenamed:@"myimage"];     [self.view addsubview:self.imageview];      self.xbutton = [[uibutton alloc] initwithframe:cgrectmake(10, 10, 100, 100)];     [self.xbutton settitle:@"x" forstate:uicontrolstatenormal];     [self.xbutton settitlecolor:[uicolor blackcolor] forstate:uicontrolstatenormal];     [self.xbutton addtarget:self action:@selector(removeviews:) forcontrolevents:uicontroleventtouchupinside];     [self.view addsubview:self.xbutton]; }  -(void)removeviews:(id)sender {     [self.imageview removefromsuperview];     [self.xbutton removefromsuperview]; }  @end

Comments

Post a Comment

Popular posts from this blog

php - render data via PDO::FETCH_FUNC vs loop -

-
i've been using 2 methods render data. the first one: function name($id,$name){ return '<div id="'.$id.'">'.$name.'</div>'; } echo implode($pdo->query("select id,name user")->fetchall(pdo::fetch_func,'name')); the second one: $users = $pdo->query("select id,name user")->fetchall(pdo::fetch_obj); foreach($users $user){ echo name($user->id,$user->name); } i don't understand how pdo::fetch_func works. tried figure out. however, not well-documented. could please explain fetch mode? , also, 1 performs better? thank you. both methods wrong , have learn how use templates , how separate business logic presentation logic. $users = $pdo->query("select id,name user")->fetchall(pdo::fetch_obj); tpl::assign('users', $users); is code business logic part. then in template <?php foreach $users $row): ?> <div id="<?=$...
Read more

c++ - OpenCV Error: Assertion failed <scn == 3 ::scn == 4> in unknown function, -

-
i read alot other solution still confused should mine... #include <opencv2/objdetect/objdetect.hpp> #include <opencv2/highgui/highgui.hpp> #include <opencv2/imgproc/imgproc.hpp> #include <iostream> #include <stdio.h> using namespace std; using namespace cv; int main(int argc, const char** argv) { //create cascade classifier object used face detection cascadeclassifier face_cascade; //use haarcascade_frontalface_alt.xml library face_cascade.load("haarcascade_frontalface_alt.xml"); //setup video capture device , link first capture device videocapture capturedevice; capturedevice.open(0); //setup image files used in capture process mat captureframe; mat grayscaleframe; //create window present results namedwindow("outputcapture", 1); //create loop capture , find faces while (true) { //capture new image frame capturedevice >> captureframe; ...
Read more

The canvas has been tainted by cross-origin data in chrome only -

-
uncaught securityerror: failed execute 'getimagedata' on 'canvasrenderingcontext2d': canvas has been tainted cross-origin data i getting above error in chrome. code(following) works fine in mozilla. have not corss domain issue. why above error in chrome? var wheel_canvas, wheel_context, can_w, can_h, wheel_grd; var large_radius = 160; var small_radius = 120; var wheel_canvas = document.getelementbyid('wheel_canvas'); var wheel_context = wheel_canvas.getcontext('2d'); var can_w = $(wheel_canvas).width(); var can_h = $(wheel_canvas).height(); var centerx = can_w / 2, centery = can_h / 2; var wheel_grd = null; test('#ff0000'); function test(hex) { $('#clrpicker').css({'left': 210, 'top': 210 }); inverted = hexbw(hex); $('#color_val_show').val(hex); current_color_hex_val_selected = hex; $('#color_val_show').css({'color':inverted,'background':hex}); fillgradient...
Read more