45.字符串与base64互转

//字符串转base64
- (NSString *)base64EcodeWithStr:(NSString *)DecodeBase64 {
    NSData *temData = [DecodeBase64 dataUsingEncoding:NSUTF8StringEncoding];
    NSString *base64Str = [temData base64EncodedStringWithOptions:0];
    return base64Str;
}

//base64转字符串
- (NSString *)deBase64EncodeWithBase64Str:(NSString *)base64Str {
    NSData * temData = [[NSData alloc]initWithBase64EncodedString:base64Str options:NSDataBase64DecodingIgnoreUnknownCharacters];
    NSString *str = [[NSString alloc]initWithData:temData encoding:NSUTF8StringEncoding];
    return str;
}