我有一个Utility方法来与API通信,它使用POST HTTP请求进行通信,在我的实用程序类中,我有一个名为的方法:
(void)makeConnectionWithParameters:(NSMutableDictionary*)parameters;
获取参数并设置POST的主体。但是,在一个特定的情况下,我想上传一些图像,并稍微改变代码,使上传图像成为可能,这种情况的最佳做法是什么?我应该将方法重命名为:
(void)makeConnectionWithParameters:(NSMutableDictionary*)parameters andImages(NSArray*)images;
并在所有其他情况下将nil设置为参数,或者我应该在调用“makeConnectionWithParameters”的方法中设置bool并检查方法是否设置了bool并且在这种情况下处理图像?
使代码更漂亮的任何其他想法?
这是方法:
(void)makeConnectionWithParameters:(NSMutableDictionary*)parameters
{
[UIApplication sharedApplication].networkActivityIndicatorVisible = YES;
NSURL *url = [NSURL URLWithString:BASE_URL];
NSMutableURLRequest *request = [NSMutableURLRequest requestWithURL:url cachePolicy:NSURLCacheStorageAllowed timeoutInterval:20];
request.HTTPMethod = @"POST";
NSString *boundary = @"myR4ND0Mboundary";
NSString *contentType = [NSString stringWithFormat:@"multipart/form-data; boundary=%@", boundary];
[request setValue:contentType forHTTPHeaderField: @"Content-Type"];
//Lägg till inloggningsuppgifter för API-anropet
[parameters setValue:API_LOGIN forKey:@"api-login"];
[parameters setValue:API_PASSWORD forKey:@"api-password"];
//Lägg till alla parameterar i POST-bodyn
NSMutableData *body = [NSMutableData data];
for (NSString *param in parameters)
{
[body appendData:[[NSString stringWithFormat:@"--%@\r\n", boundary] dataUsingEncoding:NSUTF8StringEncoding]];
[body appendData:[[NSString stringWithFormat:@"Content-Disposition: form-data; name=\"%@\"\r\n\r\n", param] dataUsingEncoding:NSUTF8StringEncoding]];
[body appendData:[[NSString stringWithFormat:@"%@\r\n", [parameters objectForKey:param]] dataUsingEncoding:NSUTF8StringEncoding]];
}
if(hasImages)
{
int c = 0;
for(UIImage* image in self.images)
{
c++;
NSData *imageData = UIImageJPEGRepresentation(image, 1.0);
if (imageData)
{
[body appendData:[[NSString stringWithFormat:@"--%@\r\n", boundary] dataUsingEncoding:NSUTF8StringEncoding]];
[body appendData:[[NSString stringWithFormat:@"Content-Disposition: form-data; name=\"%@\"; filename=\"image.jpg\"\r\n", [NSString stringWithFormat:@"image%d", c]] dataUsingEncoding:NSUTF8StringEncoding]];
[body appendData:[[NSString stringWithString:@"Content-Type: image/jpeg\r\n\r\n"] dataUsingEncoding:NSUTF8StringEncoding]];
[body appendData:imageData];
[body appendData:[[NSString stringWithFormat:@"\r\n"] dataUsingEncoding:NSUTF8StringEncoding]];
}
imageData = nil;
}
}
//Sätt content-length
NSString *postLength = [NSString stringWithFormat:@"%d", [body length]];
[request setValue:postLength forHTTPHeaderField:@"Content-Length"];
[request setHTTPBody:body];
NSURLConnection *connection = [[NSURLConnection alloc]initWithRequest:request delegate:self];
if(connection)
{
receivedData = [NSMutableData dataWithLength:0];
}
}
我希望这一切都有道理。 :)
答案 0 :(得分:1)
只需创建两个创建请求对象的方法,而不是实际的连接:
(NSMutableURLRequest*)makeConnectionWithParameters:(NSMutableDictionary*)parameters;
(NSMutableURLRequest*)makeConnectionWithParameters:(NSMutableDictionary*)parameters andImages(NSArray*)images;
在第一个方法调用内:
[self makeConnectionWithParameters:parameters andImages:nil];
...并且对第二种方法中的图像进行零检查。使用这两种方法获取您的请求,然后使用返回的对象进行NSURLConnection。