//

//  ViewController.m

//  CX－Base64加密

//

//  Created by xubaoaichiyu on 16/3/22.

//  Copyright © 2016年 xubaoaichiyu. All rights reserved.

//

#import "ViewController.h"

@interface ViewController ()

@property (weak, nonatomic) IBOutlet UIImageView *imageView;

@end

@implementation ViewController

- (void)viewDidLoad {

    [super viewDidLoad];

    // 1、 字符串转化为base64字符串

    NSString * string = @"ABC";

    NSData * data = [string dataUsingEncoding:NSUTF8StringEncoding];

    NSString * base64String = [data base64EncodedStringWithOptions:NSDataBase64Encoding64CharacterLineLength];

    NSLog(@"%@",base64String);

    //2、加密后的data转化成加密前的字符串

    //将普通的data转化为加密后的data

    NSData * base64Data = [data base64EncodedDataWithOptions:];

    //加密后的Data转换为普通data

    NSData * data2 = [[NSData alloc] initWithBase64EncodedData:base64Data options:];

    NSString * string2 = [[NSString alloc] initWithData:data2 encoding:NSUTF8StringEncoding];

    NSLog(@"%@",string2);

    //3、加密图片

    UIImage * image = [UIImage imageNamed:@""];

    NSData * dataImage = UIImagePNGRepresentation(image);

    NSString * base64StringdataImage = [dataImage base64EncodedStringWithOptions:];

    //解密图片

    NSData * decodeData = [[NSData alloc] initWithBase64EncodedString:base64StringdataImage options:];

    UIImage * decodeImage = [[UIImage alloc] initWithData:decodeData];

    self.imageView.image = decodeImage;

}

@end