iOS 请求权限封装类的实例代码

#import <foundation/foundation.h>
#import <avfoundation/avfoundation.h>
#import <assetslibrary/assetslibrary.h>
#import <photos/photos.h>
#import <corelocation/corelocation.h>
@interface permissionutil : nsobject
+(boolean)judgecamerapermission;
+(boolean)judgelocationpermission;
@end

#import "permissionutil.h"
@implementation permissionutil

+(bool)iscanusephotos {
 if ([[[uidevice currentdevice] systemversion] floatvalue] < 8.0) {
  alauthorizationstatus author =[alassetslibrary authorizationstatus];
  if (author == kclauthorizationstatusrestricted || author == kclauthorizationstatusdenied) {
   //无权限
   return no;
  }
 }
 else {
  phauthorizationstatus status = [phphotolibrary authorizationstatus];
  if (status == phauthorizationstatusrestricted ||
   status == phauthorizationstatusdenied) {
   //无权限
   return no;
  }
 }
 return yes;
}

+(boolean)judgecamerapermission{
 avauthorizationstatus authstatus = [avcapturedevice authorizationstatusformediatype:avmediatypevideo];
 if (authstatus == avauthorizationstatusrestricted || authstatus ==avauthorizationstatusdenied||![self iscanusephotos])
 {
  return no;
 }
 return yes;
}

+(boolean)judgelocationpermission{
 if ([cllocationmanager locationservicesenabled] && ([cllocationmanager authorizationstatus] == kclauthorizationstatusauthorizedwheninuse || [cllocationmanager authorizationstatus] == kclauthorizationstatusnotdetermined || [cllocationmanager authorizationstatus] == kclauthorizationstatusauthorized)) {
  return yes;
 }else if ([cllocationmanager authorizationstatus] ==kclauthorizationstatusdenied) {
  return no;
 }
 return no;
}
@end