iOS has two ways of photographing and video:
1. Direct use of Uiimagepickercontroller, this class provides a simple and easy to take pictures and select pictures in the library function.
2. Another way is to fully customize the photo-taking interface through the Avfoundation.framework framework and select the image Library interface. I have only done the first one, first to introduce you to the first approach:
First, before calling the interface, we need to first determine whether the current device supports Uiimagepickercontroller and use issourcetypeavailable: to determine whether it is available
Second, to view the type of media, this time we call Availablemediatypeforsourcetype: Judge
We need to add his two proxy methods when calling Uiimagepickercontroller:
Uinavigationcontrollerdelegate and Uiimagepickercontrollerdelegate, when calling the camera, can also adjust the flash, one will be in the code.
To invoke the flash you need to first build an instance object for the Avcapturesession class:
Copy Code code as follows:
Created by Zhang 13-1-23 on the original.
Copyright (c) 2013 Zhang Yuan. All rights reserved.
//
#import <UIKit/UIKit.h>
Invoke the Flash call frame
#import <AVFoundation/AVFoundation.h>
@interface Cameraviewcontroller:uiviewcontroller<uinavigationcontrollerdelegate, Uiimagepickercontrollerdelegate>
{
Avcapturesession * _avsession;//The class created when the Flash is invoked
}
@property (nonatomic,retain) avcapturesession * avsession;
@end
Create a 4button,camera call camera, library call picture Library, flashlight turn on flash, close turn off the flash in the. M's-(void) Viewdidload, where the button's code is created I don't write anymore.
Copy Code code as follows:
Turn on the camera
-(void) Addcarema
{
To determine if the camera can be turned on, the emulator does not use this feature
if ([Uiimagepickercontroller Issourcetypeavailable:uiimagepickercontrollersourcetypecamera]) {
Uiimagepickercontroller * Picker = [[Uiimagepickercontroller alloc]init];
Picker.delegate = self;
picker.allowsediting = YES; Whether to edit
Camera
Picker.sourcetype = Uiimagepickercontrollersourcetypecamera;
[Self presentmodalviewcontroller:picker animated:yes];
[Picker release];
}else{
If the user is not prompted
Uialertview *alert = [[Uialertview alloc] initwithtitle:@ "Error" message:@ "You don't have a webcam delegate:nil cancelbuttontitle:@" Drat! "Otherbuttontitles:nil];
[Alert show];
}
}
After you open the camera, you need to call the method in Uiimagepickercontrollerdelegate, shoot the method that is executed after the completion, and then follow the method after you click Cancel:
Copy Code code as follows:
How to execute after the shot is complete
-(void) Imagepickercontroller: (Uiimagepickercontroller *) Picker Didfinishpickingmediawithinfo: (nsdictionary *) info
{
Get Pictures
UIImage * image = [info objectforkey:uiimagepickercontrolleroriginalimage];
Picture in album
Uiimagewritetosavedphotosalbum (image, nil, nil, nil);
[Self dismissmodalviewcontrolleranimated:yes];
}
Execute method after clicking Cancel button
-(void) Imagepickercontrollerdidcancel: (Uiimagepickercontroller *) picker
{
[Self dismissmodalviewcontrolleranimated:yes];
}
Call camera photo and save to Picture library has been completed.
Next, open photo Gallery:
Copy Code code as follows:
-(void) openpiclibrary
{
Albums can be opened with an emulator
if ([Uiimagepickercontroller issourcetypeavailable:uiimagepickercontrollersourcetypephotolibrary]) {
Uiimagepickercontroller * Picker = [[Uiimagepickercontroller alloc]init];
Picker.delegate = self;
Picker.allowsediting = yes;//Whether you can edit
Open album Select photos
Picker.sourcetype = uiimagepickercontrollersourcetypephotolibrary;
[Self presentmodalviewcontroller:picker animated:yes];
[Picker release];
}else{
Uialertview *alert = [[Uialertview alloc] initwithtitle:@ "Error" message:@ "You don't have a webcam delegate:nil cancelbuttontitle:@" Drat! "Otherbuttontitles:nil];
[Alert show];
}
}
Select the Proxy method to enter the picture
-(void) Imagepickercontroller: (Uiimagepickercontroller *) Picker didfinishpickingimage: (uiimage *) Image Editinginfo :(nsdictionary *) editinginfo
{
[Self dismissmodalviewcontrolleranimated:yes];
}
Call the flash code, because I am not very understanding, so I can not annotate, but has been pro-test available, but the Flash is a bug bar, the flash will be idle, and then continue to light
Copy Code code as follows:
-(void) openflashlight
{
Avcapturedevice * device = [Avcapturedevice defaultdevicewithmediatype:avmediatypevideo];
if (Device.torchmode = = Avcapturetorchmodeoff) {
Create an AV session
Avcapturesession * session = [[Avcapturesession alloc]init];
Create device input and add to current session
Avcapturedeviceinput * input = [avcapturedeviceinput deviceinputwithdevice:device error:nil];
[Session Addinput:input];
Create video output and add to
Avcapturevideodataoutput * output = [[Avcapturevideodataoutput alloc]init];
[Session Addoutput:output];
Start Session Configuration
[Session beginconfiguration];
[Device Lockforconfiguration:nil];
Set Torch to On
[Device Settorchmode:avcapturetorchmodeon];
[Device unlockforconfiguration];
[Session commitconfiguration];
Start session
[Session startrunning];
Keep the session Around
[Self setavsession:self. Avsession];
[Output RELEASE];
}
}
-(void) closeflashlight
{
[Self. Avsession stoprunning];
[Self. Avsession release];
}
The above mentioned is the entire content of this article, I hope you can enjoy.
