objective c - iOS how to start the image picker -

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i have uibutton , when user clicks it, want start image picker controller

i configure think enough couldn't know message have pass image picker start working

this code

#import "imagepickerviewcontroller.h"  @interface imagepickerviewcontroller () @property (weak, nonatomic) iboutlet uiimageview *image;   @end  @implementation imagepickerviewcontroller   - (void)viewdidload {     [super viewdidload];     // additional setup after loading view. } - (ibaction)selectimage:(id)sender {     uiimagepickercontroller *imagepicker = [[uiimagepickercontroller alloc]init];     imagepicker.delegate = self;     imagepicker.sourcetype = uiimagepickercontrollersourcetypephotolibrary; }  @end

i have set correct protocols:

@interface imagepickerviewcontroller : uiviewcontroller < uinavigationcontrollerdelegate,uiimagepickercontrollerdelegate>  @end

you need present uiimagepicker

- (ibaction)selectimage:(id)sender {     uiimagepickercontroller *imagepicker = [[uiimagepickercontroller alloc]init];     imagepicker.delegate = self;     imagepicker.sourcetype = uiimagepickercontrollersourcetypephotolibrary;     [self presentviewcontroller:imagepicker animated:no completion:nil]; }

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