iOS NSURLSession相关

#define DATA(X)	[X dataUsingEncoding:NSUTF8StringEncoding]
#define kBoundary @"------------0x0x0x0x0x0x0x0x"
#define IMAGE_CONTENT  @"Content-Disposition: form-data; name=\"%@\"; filename=\"%@\"\r\nContent-Type: image/jpeg\r\n\r\n"
#define STRING_CONTENT @"Content-Disposition: form-data; name=\"%@\"\r\n\r\n"
#define MULTIPART @"multipart/form-data; boundary=------------0x0x0x0x0x0x0x0x"

NSString *kAFAppNetworkAPIBaseURLString = @"http://192.168.1.254:80/pmb/";

- (NSData *)prepareDataForUpload:(NSDictionary*)dict {
NSArray *keys = [dict allKeys];
NSMutableData *result = [NSMutableData data];

for (int i = 0; i < [keys count]; i++) {
id value = dict[keys[i]];
[result appendData:[[NSString stringWithFormat:@"--%@\r\n", kBoundary] dataUsingEncoding:NSUTF8StringEncoding]];

if ([value isKindOfClass:[NSData class]]) {
// handle image data
NSString *formstring = [NSString stringWithFormat:IMAGE_CONTENT, keys[i], dict[@"fileName"]];
[result appendData: DATA(formstring)];
[result appendData:value];
} else {
// all non-image fields assumed to be strings
NSString *formstring = [NSString stringWithFormat:STRING_CONTENT, keys[i]];
[result appendData: DATA(formstring)];
[result appendData:DATA(value)];
}

NSString *formstring = @"\r\n";
[result appendData:DATA(formstring)];
}

NSString *formstring =[NSString stringWithFormat:@"--%@--\r\n", kBoundary];
[result appendData:DATA(formstring)];
return result;
}

- (void)touchesBegan:(NSSet<UITouch *> *)touches withEvent:(UIEvent *)event {
[self uploadFileDict:@{@"user_id":@"44", @"file":UIImagePNGRepresentation([UIImage imageNamed:@"icon41"]), @"fileName":@"icon41.png"} toUrlString:[NSString stringWithFormat:@"%@uploadPhoto", kAFAppNetworkAPIBaseURLString]];
}

- (void)uploadFileDict:(NSDictionary *)dict toUrlString:(NSString *)urlString {
NSData *postData = [self prepareDataForUpload:dict];
NSLog(@"#####################################################\n");
NSLog(@"post:%@", postData);//[[NSString alloc] initWithData:postData encoding:NSUTF8StringEncoding]);
NSLog(@"#####################################################\n");

NSURL *url = [NSURL URLWithString:urlString];
NSMutableURLRequest *urlRequest = [NSMutableURLRequest requestWithURL:url];

[urlRequest setHTTPMethod: @"POST"];
[urlRequest setValue:MULTIPART forHTTPHeaderField: @"Content-Type"];
//[urlRequest setHTTPBody:postData];//在session传data就注释改行, session传request就设置body

NSURLSessionConfiguration *config = [NSURLSessionConfiguration defaultSessionConfiguration];
NSURLSession *session = [NSURLSession sessionWithConfiguration:config];
#if 1
[[session uploadTaskWithRequest:urlRequest fromData:postData completionHandler:^(NSData * _Nullable data, NSURLResponse * _Nullable response, NSError * _Nullable error) {
NSLog(@"%@", response);

NSString *outstring = [[NSString alloc] initWithData:data encoding:NSUTF8StringEncoding];
NSLog(@"\n1server return message:%@\n", outstring);
}] resume];
#else
[[session dataTaskWithRequest:urlRequest completionHandler:^(NSData * _Nullable data, NSURLResponse * _Nullable response, NSError * _Nullable error) {
NSLog(@"%@", response);

NSString *outstring = [[NSString alloc] initWithData:data encoding:NSUTF8StringEncoding];
NSLog(@"\n2server return message:%@\n", outstring);
}] resume];
#endif
}

//修改名称
- (void)changeName:(NSString *)name {
[self normalDicPost:@{@"user_id":@"55", @"nickname":name} action:@"uploadUserInfo" selector:@selector(changeName:)];
}

- (void)normalDicPost:(NSDictionary *)param action:(NSString *)path selector:(SEL)sel {
// 1
NSString *paramStr = @"";
for (NSString *key in param) {
paramStr = [NSString stringWithFormat:@"%@&%@=%@", paramStr, key, param[key]];
}
paramStr = [paramStr substringFromIndex:1];
NSData *paramData = [paramStr dataUsingEncoding:NSUTF8StringEncoding];

// 2
NSURL *url = [NSURL URLWithString:[NSString stringWithFormat:@"%@/%@", kAFAppNetworkAPIBaseURLString, path]];
NSMutableURLRequest *request = [NSMutableURLRequest requestWithURL:url];
[request setHTTPMethod: @"POST"];
[request setHTTPBody:paramData];

NSURLSessionConfiguration *config = [NSURLSessionConfiguration ephemeralSessionConfiguration];
NSURLSession *session = [NSURLSession sessionWithConfiguration:config];
[[session dataTaskWithRequest:request completionHandler:^(NSData * _Nullable data, NSURLResponse * _Nullable response, NSError * _Nullable error) {
//NSString *outstring = [[NSString alloc] initWithData:data encoding:NSUTF8StringEncoding];
//NSLog(@"server return message:%@\n\n%@", outstring, response);

//3 work
NSDictionary *dic = [NSJSONSerialization JSONObjectWithData:data options:NSJSONReadingMutableLeaves error:nil];
NSString *printStr = @"{\n";
for (NSString *key in dic) {
printStr = [NSString stringWithFormat:@"%@ %@ = %@\n", printStr, key, dic[key]];
}
NSLog(@"返回结果 %@} %@\n", printStr, [NSThread currentThread]);

//处理数据 继承类根据sel来取值

}] resume];
}