iphone - 解码字符串时获取垃圾和特殊字符

Question

<分区>

Answer 1

往这边走

1. 从 here 下载 Base64 文件

2. 从下载的文件夹中提取这两个文件(NSData+Base64.h, NSData+Base64.m)并添加到您的项目中。

3. 为这些新添加的文件禁用 ARC(如果您在项目中启用 ARC)

4. #import "NSData+Base64.h" 到你的文件中

5. 使用以下两种方法完成您的任务

   base64Encode

   base64解码

这是我的代码片段，我在演示示例中是如何做的

#import "ViewController.h"
#import "NSData+Base64.h"

@interface ViewController ()
@end

@implementation ViewController

@synthesize messageTextField;
@synthesize resultBase64Label;
@synthesize resultPlainTextLabel;

- (void)viewDidLoad
{
    [super viewDidLoad];    
}

- (void)didReceiveMemoryWarning
{
    [super didReceiveMemoryWarning];
}

- (IBAction)convertToBase64:(id)sender {
    
    //keypad go back
    [messageTextField resignFirstResponder];
    
    NSString *resultBase64String = [self base64Encode:messageTextField.text];
    resultBase64Label.text = resultBase64String;    
}

- (IBAction)convertToPlainText:(id)sender {
    
    NSString *resultPlainString = [self base64Decode:resultBase64Label.text];
    resultPlainTextLabel.text = resultPlainString;
}

//convert plain text o base64
- (NSString *)base64Encode:(NSString *)plainText
{
    NSData *plainTextData = [plainText dataUsingEncoding:NSUTF8StringEncoding];
    NSString *base64String = [plainTextData base64EncodedString];
    return base64String;
}

//convert base64 to plain text
- (NSString *)base64Decode:(NSString *)base64String
{
    NSData *plainTextData = [NSData dataFromBase64String:base64String];
    NSString *plainText = [[NSString alloc] initWithData:plainTextData encoding:NSUTF8StringEncoding];
    return plainText;
}

@end

这是结果界面