嗨，我对ios非常新，在我的项目中我使用NSUrlSession来调用服务
但在我的下面的代码中，我维护if和else处理服务器响应的条件，但那些if和else条件没有调用
请帮助我在哪里做个错误的好事？
- (void)viewDidLoad {
[super viewDidLoad];
NSMutableURLRequest *request = [NSMutableURLRequest requestWithURL:[NSURL URLWithString:myurl here]];
cachePolicy:NSURLRequestUseProtocolCachePolicy
timeoutInterval:60.0];
[request setValue:@"application/x-www-form-urlencoded" forHTTPHeaderField:@"Content-Type"];
[request setHTTPMethod:@"GET"];
[request setHTTPBody:[self httpBodyForParamsDictionary:params]];
//You now can initiate the request with NSURLSession or NSURLConnection, however you prefer. For example, with NSURLSession, you might do:
NSURLSessionTask *task = [[NSURLSession sharedSession] dataTaskWithRequest:request completionHandler:^(NSData *data, NSURLResponse *response, NSError *error) {
if (error) {
NSLog(@"dataTaskWithRequest error: %@", error);
NSString * BasicnetworkError = [error localizedDescription];
NSString * AppendString = @"Http Response failed with the following ";
NSString * networkError = [AppendString stringByAppendingString:BasicnetworkError];
[self BasicError1:networkError];
}
else if ([response isKindOfClass:[NSHTTPURLResponse class]]) {
NSInteger statusCode = [(NSHTTPURLResponse *)response statusCode];
if (statusCode != 200) {
NSLog(@"Expected responseCode == 200; received %ld", (long)statusCode);
NSString *statusCodeError = [NSString stringWithFormat: @"Http Response failed with the following code %ld", (long)statusCode];
[self BasicError1:statusCodeError];
}
}
// If response was JSON (hopefully you designed web service that returns JSON!),
// you might parse it like so:
else{
NSError *parseError;
id responseObject = [NSJSONSerialization JSONObjectWithData:data options:0 error:&parseError];
NSLog(@"else condtion");
if (!responseObject) {
NSLog(@"JSON parse error: %@", parseError);
} else {
NSLog(@"responseObject = %@", responseObject);
[self MainService:responseObject];
}
//if response was text/html, you might convert it to a string like so:
// ---------------------------------
NSString *responseString = [[NSString alloc] initWithData:data encoding:NSUTF8StringEncoding];
NSLog(@"final responseString = %@", responseString);
}
}];
[task resume];
}
- (NSData *)httpBodyForParamsDictionary:(NSDictionary *)paramDictionary{
NSMutableArray *parameterArray = [NSMutableArray array];
[paramDictionary enumerateKeysAndObjectsUsingBlock:^(NSString *key, NSString *obj, BOOL *stop) {
NSString *param = [NSString stringWithFormat:@"%@=%@", key, [self percentEscapeString:obj]];
[parameterArray addObject:param];
}];
NSString *string = [parameterArray componentsJoinedByString:@"&"];
return [string dataUsingEncoding:NSUTF8StringEncoding];
}
- (NSString *)percentEscapeString:(NSString *)string{
NSString *result = CFBridgingRelease(CFURLCreateStringByAddingPercentEscapes(kCFAllocatorDefault,
(CFStringRef)string,
(CFStringRef)@" ",
(CFStringRef)@":/?@!$&'()*+,;=",
kCFStringEncodingUTF8));
return [result stringByReplacingOccurrencesOfString:@" " withString:@"+"];
}
答案 0 :(得分：1)
您的代码中提到了if else阻止错误的情况。请使用以下代码。
- (void)viewDidLoad {
[super viewDidLoad];
NSDictionary *mainDictionary = [NSDictionary dictionaryWithObjectsAndKeys:
@"COLLECTION",@"SearchBy",
@"1284",@"SearchKey",
@"",@"Color",
@"",@"PriceFrom",
@"",@"PriceTo",
@"",@"QtyFrom",
@"",@"QtyTo",
nil];
NSMutableURLRequest *request = [NSMutableURLRequest requestWithURL:[NSURL URLWithString:@"http://203.77.214.78/StockManager/SL/SearchProducts"]
cachePolicy:NSURLRequestUseProtocolCachePolicy
timeoutInterval:60.0];
[request setValue:@"application/x-www-form-urlencoded" forHTTPHeaderField:@"Content-Type"];
[request setHTTPMethod:@"POST"];
[request setHTTPBody:[self httpBodyForParamsDictionary:mainDictionary]];
//You now can initiate the request with NSURLSession or NSURLConnection, however you prefer. For example, with NSURLSession, you might do:
NSURLSessionTask *task = [[NSURLSession sharedSession] dataTaskWithRequest:request completionHandler:^(NSData *data, NSURLResponse *response, NSError *error) {
if (error) {
NSLog(@"dataTaskWithRequest error: %@", error);
}
else if ([response isKindOfClass:[NSHTTPURLResponse class]]) {
NSInteger statusCode = [(NSHTTPURLResponse *)response statusCode];
if (statusCode != 200) {
NSLog(@"Expected responseCode == 200; received %ld", (long)statusCode);
}else{
NSError *parseError;
id responseObject = [NSJSONSerialization JSONObjectWithData:data options:0 error:&parseError];
NSLog(@"else condtion");
if (!responseObject) {
NSLog(@"JSON parse error: %@", parseError);
} else {
NSLog(@"responseObject = %@", responseObject);
}
//if response was text/html, you might convert it to a string like so:
// ---------------------------------
NSString *responseString = [[NSString alloc] initWithData:data encoding:NSUTF8StringEncoding];
NSLog(@"final responseString = %@", responseString);
}
}
}];
[task resume];
}