将nsMutablestring转换为iOS中的nsdata

Question

我是新来的iOS开发我试图转换附加在NSdata，但我无法做到这一转换我试过一些代码。在我的Nsmutable字符串中我有一个url链接有视频我传递的字符串形式json所以现在我想附加NSdata来显示该视频的网址

这是代码为NSmutablesring通过url链接

-(void)setDataSource:(vedios *)inVideosObj 
{ 

    self.titile.text = inVideosObj.title; 

    url =[NSURL URLWithString:inVideosObj.video]; 
    NSURLRequest *request =[NSURLRequest requestWithURL:url]; 
    connection =[[NSURLConnection alloc] initWithRequest:request delegate:self]; 
    self.responseData = [[NSMutableString alloc]init]; 

} 

的NSMutableString appeand编码：

- (void)connection:(NSURLConnection *)connection didReceiveData:(NSData *)data; 
{ 

    NSData *mydata =[self.responseData dataUsingEncoding:NSUTF16StringEncoding]; 

    [self.responseData appendString:data]; 



} 

Answer 1

您正在将responseData初始化为NSMutableString。初始化它作为一个NSMutableData

@property (nonatomic, weak) NSMutableData * responseData; 

现在

-(void)setDataSource:(vedios *)inVideosObj 
{ 
    //Your work 
    self.responseData = [NSMutableData alloc] init]; 
} 

- (void)connection:(NSURLConnection *)connection didReceiveData:(NSData *)data; 
{ 
    [self.responseData appendData: data]; 

} 

然后转换这个self.responseData，如果你想NSString ..

NSString * responseString = [NSString alloc] initWithData: self.responseData encoding: NSUTF16StringEncoding] 

享受.. !!

Answer 2

的NSString NSData的

NSString* strResult = @"yourstring"; 
NSData* dataResult = [strResult dataUsingEncoding:NSUTF8StringEncoding]; 

NSData to NSMutableString

NSMutableString *jsonStr = [[NSMutableString alloc] initWithData:response encoding:NSUTF8StringEncoding]; 

NSLog(@"%@",jsonStr);