换取头像

#import "ViewController.h"

@interface ViewController ()<UIImagePickerControllerDelegate,UINavigationControllerDelegate>
{
    UIImageView *UserHeadImage;
}

@end

@implementation ViewController

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

    UIImageView *headBackImage = [[UIImageView alloc]initWithFrame:CGRectMake(0, 0, Main_Width, widget_height(270))];
    [headBackImage setImage:[UIImage imageNamed:@"Mine_Background"]];
    headBackImage.userInteractionEnabled = YES;
    [self.view addSubview:headBackImage];

    //用户默认头像
    UIButton *headBtn = [[UIButton alloc]initWithFrame:CGRectMake((Main_Width - widget_height(169))/2, widget_height(35), widget_height(169), widget_height(169))];

    [headBackImage addSubview:headBtn];
    UserHeadImage = [[UIImageView alloc]initWithFrame:CGRectMake(0, 0, widget_height(169), widget_height(169))];
   [UserHeadImage setImage:[UIImage imageNamed:@"Mine_UserHead"]];
    UserHeadImage.layer.masksToBounds = YES;
    UserHeadImage.layer.cornerRadius = widget_height(169)/2;
    [headBackImage addSubview:headBtn];

    [headBtn addSubview:UserHeadImage];

    [headBtn addTarget:self action:@selector(tapToUserInfoPage) forControlEvents:UIControlEventTouchUpInside];

}
- (void)tapToUserInfoPage {

    #if __IPHONE_OS_VERSION_MAX_ALLOWED >= _IPHONE_8_0
        UIAlertController *alertController = [UIAlertController alertControllerWithTitle:@"请选择" message:nil preferredStyle: UIAlertControllerStyleActionSheet];
        UIAlertAction *cancelAction = [UIAlertAction actionWithTitle:@"取消" style:UIAlertActionStyleCancel handler:^(UIAlertAction * _Nonnull action) {

        }];
        UIAlertAction *photoLibraryAction = [UIAlertAction actionWithTitle:@"相册" style:UIAlertActionStyleDefault handler:^(UIAlertAction * _Nonnull action) {
            [self getImageFromPhotoLibrary];
        }];
        UIAlertAction *cameraAction = [UIAlertAction actionWithTitle:@"相机" style:UIAlertActionStyleDefault handler:^(UIAlertAction * _Nonnull action) {

            [self getImageFromCamera];

        }];
        [alertController addAction:cancelAction];
        [alertController addAction:photoLibraryAction];
        [alertController addAction:cameraAction];

        [self presentViewController:alertController animated:YES completion:NULL];

#endif

    #if __IPHONE_OS_VERSION_MAX_ALLOWED < _IPHONE_8_0
       UIActionSheet *alertView = [[UIActionSheet alloc] initWithTitle:@"请选择" delegate:self cancelButtonTitle:@"取消" destructiveButtonTitle:nil otherButtonTitles:@"相册",@"相机", nil];

        [alertView showInView:self.view];
    #endif

}

- (void)actionSheet:(UIActionSheet *)actionSheet clickedButtonAtIndex:(NSInteger)buttonIndex
{
    switch (buttonIndex) {
        case 0:
            [self getImageFromPhotoLibrary];
            break;
        case 1:
            [self getImageFromCamera];
            break;
        default:
            break;
    }
}
//从相册获取
- (void)getImageFromPhotoLibrary
{
    UIImagePickerController *picker = [[UIImagePickerController alloc] init];
    [picker.navigationBar setBackgroundImage:[UIImage imageNamed:@"partner_navi"] forBarMetrics:UIBarMetricsDefault];
    [picker.navigationBar setTitleTextAttributes:[NSDictionary dictionaryWithObjectsAndKeys:[UIColor whiteColor],NSForegroundColorAttributeName, nil]];
    picker.sourceType = UIImagePickerControllerSourceTypePhotoLibrary;
    picker.delegate = self;
    //设置选择后的图片可被编辑
    picker.allowsEditing = YES;
    [self presentViewController:picker animated:YES completion:NULL];
}
//调用相机
- (void)getImageFromCamera
{
    UIImagePickerController *imagePicker = [[UIImagePickerController alloc] init];

    if ([UIImagePickerController isSourceTypeAvailable:UIImagePickerControllerSourceTypeCamera])
    {

        imagePicker.sourceType = UIImagePickerControllerSourceTypeCamera;

        imagePicker.allowsEditing = YES;
        imagePicker.delegate = self;

        [self presentViewController:imagePicker animated:YES completion:NULL];

    }
    else
    {
//        UIAlertController*alert = [UIAlertController alertControllerWithTitle:@"tishi" message:@"相机不能用" preferredStyle:UIAlertControllerStyleAlert];
//        UIAlertAction *confirm = [UIAlertAction actionWithTitle:@"确定" style:UIAlertActionStyleDefault handler:^(UIAlertAction *action){}];[alert addAction:confirm];
//        [self presentViewController:alert animated:YES completion:nil];

        [self creatAlert:@"相机不能用"];

    }
}
#pragma mark - image picker delegte   调用系统相机

- (void)imagePickerController:(UIImagePickerController *)picker didFinishPickingMediaWithInfo:(NSDictionary *)info
{
    //获取图片
    UIImage *image = [info objectForKey:UIImagePickerControllerEditedImage];
    UserHeadImage.image = image;

    [self dismissViewControllerAnimated:YES completion:NULL];
}

- (void)didReceiveMemoryWarning {
    [super didReceiveMemoryWarning];
    // Dispose of any resources that can be recreated.
}
- (void)creatAlert:(NSString *)msg
{
#if __IPHONE_OS_VERSION_MAX_ALLOWED < _IPHONE_8_0
    UIAlertView *alert = [[UIAlertView alloc]initWithTitle:@"提示"
                                                   message:msg
                                                  delegate:nil
                                         cancelButtonTitle:@"确定"
                                         otherButtonTitles:nil];
    [alert show];
#endif

#if __IPHONE_OS_VERSION_MAX_ALLOWED >= _IPHONE_8_0
    UIAlertController *avc = [UIAlertController alertControllerWithTitle:@"提示" message:msg preferredStyle:UIAlertControllerStyleAlert];
    UIAlertAction *action = [UIAlertAction actionWithTitle:@"确定" style:UIAlertActionStyleCancel handler:^(UIAlertAction * _Nonnull action) {

    }];
    [avc addAction:action];
    [self presentViewController:avc animated:YES completion:^{

    }];
#endif
}

@end

#ifndef Prefix_pch

#define Prefix_pch

//获取屏幕高宽

#define Main_Height      [[UIScreen mainScreen] bounds].size.height

#define Main_Width       [[UIScreen mainScreen] bounds].size.width

#define widget_width(w)  ((w) * Main_Width / 750)

#define widget_height(h) ((h) * Main_Height / 1334)

#endif /* Prefix_pch */