[iOS 系统]系统音频.相册.相机 权限判断

#import <AudioToolbox/AudioToolbox.h>
#import <AVFoundation/AVFoundation.h>
#import <AssetsLibrary/AssetsLibrary.h>

#import "ViewController.h"
#import <AudioToolbox/AudioToolbox.h>
#import <AVFoundation/AVFoundation.h>
#import <AssetsLibrary/AssetsLibrary.h>

#define SoundID 1317
@interface ViewController (){

}
@property (weak, nonatomic) IBOutlet UITextField *soundtextfiled;

@end

@implementation ViewController

- (void)viewDidLoad {
[super viewDidLoad];
// Do any additional setup after loading the view, typically from a nib.
}

- (void)didReceiveMemoryWarning {
[super didReceiveMemoryWarning];
// Dispose of any resources that can be recreated.
}

-(void)touchesBegan:(NSSet<UITouch *> *)touches withEvent:(UIEvent *)event{

for (UIView *v in self.view.subviews) {
if ([v isKindOfClass:[UITextField class]]) {
UITextField *t = (UITextField*)v;
[t resignFirstResponder];
}

}
}

// 点击发出系统音
- (IBAction)sound:(id)sender {

AudioServicesPlaySystemSound([_soundtextfiled.text intValue]);

}
// 点击触发系统震
- (IBAction)vibration:(id)sender {
AudioServicesPlaySystemSound(kSystemSoundID_Vibrate);

}
//点击检测相机权限
- (IBAction)camera:(id)sender {

//ios7之前系统默认拥有权限
if ([[[UIDevice currentDevice] systemVersion] floatValue] >= 7) {

AVAuthorizationStatus authStatus = [AVCaptureDevice authorizationStatusForMediaType:AVMediaTypeVideo];
if (authStatus == AVAuthorizationStatusDenied) {
_soundtextfiled.placeholder = @"您还未为本App开通相机权限";
}else{
_soundtextfiled.placeholder = @"本App拥有相机开启权限";
}
}

}
// 点击检测相册权限
- (IBAction)photo:(id)sender {
//iOS8 以下系统默认有权限
if ([[[UIDevice currentDevice] systemVersion] floatValue] >= 8) {
ALAuthorizationStatus authStates = [ALAssetsLibrary authorizationStatus];
if ( authStates ==  ALAuthorizationStatusDenied) {
_soundtextfiled.placeholder = @"您没有访问相册的权限";
}
else{
_soundtextfiled.placeholder = @"您拥有访问相册的权限";
}
}
}
@end