iOS 本地头像加载与上传头像图片

// 上传本地图片（存储到沙河，上传到服务器）

#import "ViewController.h"
@interface ViewController ()<UIImagePickerControllerDelegate, UINavigationControllerDelegate>
@property (nonatomic, strong)UIImage *avatar; // 获取本地图片
@property  (nonatomic, strong)UIImageView *avatar1; //
@end

@implementation ViewController

- (void)viewDidLoad {
    [super viewDidLoad];

    UIButton *button = [[UIButton alloc]init];
    button.frame = CGRectMake(100, 250, 100, 100);
    [button setTitle:@"上传图片" forState:UIControlStateNormal];
    button.backgroundColor = [UIColor redColor];
    [button addTarget:self action:@selector(btnActionForEditPortrait:) forControlEvents:UIControlEventTouchUpInside];
    [self.view addSubview:button];

    _avatar1 = [[UIImageView alloc]init];
    _avatar1.frame = CGRectMake(100, 80, 80, 80);
    _avatar1.backgroundColor = [UIColor blackColor];
    _avatar1.layer.masksToBounds = YES;
    _avatar1.layer.cornerRadius = CGRectGetHeight(_avatar1.bounds) / 2;
    _avatar1.layer.borderWidth = 2.0f;
    _avatar1.layer.borderColor = [[UIColor lightGrayColor]CGColor];

    //  获取存放在NSUserDefaults里面的图片
//    NSData *data = [[NSUserDefaults standardUserDefaults]objectForKey:@"avatar"];
//    if (data == nil) {
//        NSLog(@"11111---%@", data);
//        _avatar1.image = [UIImage imageNamed:@"Wechat"];
//    } else
//    {
//        _avatar1.image = [UIImage imageWithData:data];
//    }
    [self.view addSubview:_avatar1];
}

#pragma mark 图片将要加载的时候处理占位图
- (void)viewWillAppear:(BOOL)animated
{
//        _avatar1 = [[UIImageView alloc]init];
//        _avatar1.frame = CGRectMake(100, 80, 80, 80);
//        _avatar1.backgroundColor = [UIColor blackColor];
//        _avatar1.layer.masksToBounds = YES;
//        _avatar1.layer.cornerRadius = CGRectGetHeight(_avatar1.bounds) / 2;
//        _avatar1.layer.borderWidth = 2.0f;
//        _avatar1.layer.borderColor = [[UIColor lightGrayColor]CGColor];

        //  获取存放在NSUserDefaults里面的图片
        NSData *data = [[NSUserDefaults standardUserDefaults]objectForKey:@"avatar"];
        if (data == nil) {
            NSLog(@"viewWillAppear 11111---%@", data);
            _avatar1.image = [UIImage imageNamed:@"Wechat"];
        } else
        {
            _avatar1.image = [UIImage imageWithData:data];
        }
        [self.view addSubview:_avatar1];
}

#pragma mark 打开本地照片
- (void)btnActionForEditPortrait:(id)sender {
    // 打开本地照片
    UIImagePickerController *picker = [[UIImagePickerController alloc]init];
    picker.delegate = self;
    picker.sourceType = UIImagePickerControllerSourceTypePhotoLibrary;
    picker.allowsEditing = YES;
    [self presentViewController:picker animated:YES completion:nil];

}

//  选择图片
- (void)imagePickerController:(UIImagePickerController *)picker didFinishPickingMediaWithInfo:(NSDictionary<NSString *,id> *)info
{
//   _avatar = info[UIImagePickerControllerOriginalImage];
    _avatar  = info[UIImagePickerControllerEditedImage];

    [self saveImage:_avatar withNamge:@"userAvatar"];
    // 处理完毕   回到个人信息页面
    [picker dismissViewControllerAnimated:YES completion:nil];

}

- (void)saveImage:(UIImage *)tempImage withNamge:(NSString *)imageName
{
    NSData *imageData = UIImagePNGRepresentation(tempImage);
    // 获取路径
    NSString *documentPath = [NSSearchPathForDirectoriesInDomains(NSDocumentDirectory, NSUserDomainMask, YES) lastObject];
    // 拼接路径
    NSString *totalPath = [documentPath stringByAppendingString:imageName];
    // 保存到document
    [imageData writeToFile:totalPath atomically:YES];
    NSLog(@"document --- %@", totalPath);
    [_avatar1 setImage:[self getImage:totalPath]];


    // 保存到NSUserDefaults
    NSUserDefaults *userDefaults = [NSUserDefaults standardUserDefaults];
    [userDefaults setObject:imageData forKey:@"avatar"];

#pragma mark  上传服务器


}

// 从document取得图片
- (UIImage *)getImage:(NSString *)urlStr
{
    return [UIImage imageWithContentsOfFile:urlStr];
}