Customizing the Compass Implementation

#import "ViewController.h"

#import <CoreLocation/CoreLocation.h>

@interface Viewcontroller () <cllocationmanagerdelegate>

@property(nonatomic,strong)Cllocationmanager*manager;

@property (weak, nonatomic) iboutlet uiimageview *imagew;

@end

@implementation Viewcontroller

-(Cllocationmanager*) Manager

{

if (_manager= =Nil) {

_manager=[[cllocationmanager alloc]init];

}

return _manager;

}

-(void) viewdidload {

[Super viewdidload];

self. Manager. Delegate=self;

// judge iOS7 or 8

if([[uidevice currentdevice]. Systemversion doublevalue]>8.0)

{

//[self.manager requestwheninuseauthorization];

[self. Manager requestalwaysauthorization];

}

[self. Manager stopupdatingheading];

}

-(void) Locationmanager: (cllocationmanager *) Manager didupdateheading: (clheading *) Newheading

{

cgfloat angle=newheading. Magneticheading*m_pi/;

// rotate picture

self. Imagew. Transform =cgaffinetransformmakerotation(-angle);

}

@end

Customizing the Compass Implementation