在我们看到比如淘宝网或者其他的app，在进入一个页面，还没有完全加载进去的时候，当前的app是卡线程的，也就是同步加载的数据，而我们在上传或者下载数据的时候，往往会用到get或者post请求方式，那么我们就可以自身封装一个网络请求方式，就像淘宝网app这样的，可以在进入一个页面的时候，同步加载数据，直到数据加载完成才展示我们的UI控件.
下面是代码部分:
+ (void)httpRequestUrl:(NSString *)requestUrl httpMethod:(NSString *)method httpBody:(NSMutableDictionary *)body normal:(BOOL)isNormal asynchronous:(BOOL)isAsynchronous callBack:(CallBack)callBack{
[Macro Log:requestUrl]; // 内部封装的类方法，用于打印请求的网址
NSUrl * url = [[NSUrl URLWithString:[requestUrl stringByAddingPercentEscapesUsingEncoding:NSUTF8StringEncoding];
NSMutableURLRequest *urlRequest=[NSMutableURLRequest requestWithURL:url cachePolicy:NSURLRequestUseProtocolCachePolicy timeoutInterval:15];
[urlRequest setHTTPMethod:method.length?method:HTTP_GET]; // 如果是请求方式（get还是post）
if (isNormal)
{
[urlRequest addValue:@"application/json" forHTTPHeaderField:@"Content-Type"];
NSMutableString *authorization=[NSMutableString string];
[authorization appendString:MD5_KEY];
[authorization appendString:requestUrl];
[urlRequest addValue:[authorization MD5String] forHTTPHeaderField:@"Authorization"];
NSMutableString *accept=[NSMutableString string];
[accept appendFormat:@"version:%@,channelType:2,lat:%f,lon:%f",SHARE_USER_CONTEXT.version.versionNo,SHARE_USER_CONTEXT.userLocation.coordinate.latitude,SHARE_USER_CONTEXT.userLocation.coordinate.longitude];
[urlRequest addValue:accept forHTTPHeaderField:@"Accept"];
}
if (body) {
NSString *bodyString=[body JSONString];
[urlRequest setHTTPBody:[bodyString dataUsingEncoding:NSUTF8StringEncoding]];
}
AFHTTPRequestOperation *operation=[[AFHTTPRequestOperation alloc] initWithRequest:urlRequest];
operation.responseSerializer=[AFJSONResponseSerializer serializer];
[operation setCompletionBlockWithSuccess:^(AFHTTPRequestOperation *operation,id responseObject) {
if (!isAsynchronous)
{
// [Macro unFreezeScreen];
[Macro unLoadAnimation];
}
[PutData putdataName:@"成功响应：" ContentId:responseObject];
callBack(responseObject);
}failure:^(AFHTTPRequestOperation *operation,NSError *error) {
if (!isAsynchronous)
{
// [Macro unFreezeScreen];
[Macro unLoadAnimation];
}
if (isAsynchronous)// 每45s上传坐标的接口传值为YES
{
}
else
{
if (operation.responseString.length)
{
AlertShow(nil, operation.responseString);
}
else
{
AlertShow(nil, [error localizedDescription]);
}
}
[PutData putdataName:@"出错响应：" ContentId:operation.responseString];
callBack(operation.responseString);
[PutData putdataName:@"出错原因：" ContentId:[error localizedDescription]];
[PutData putdataName:@"出错原因:" ContentId:requestUrl];
[Macro Log:[error localizedDescription]];
}];
if (!isAsynchronous)
{
// [Macro freezeScreen];
[Macro loadAnimation:@"正在加载..."];
}
[[NSOperationQueue mainQueue] addOperation:operation];
}
ok,那封装了的数据请求之后，就是怎么使用了，以添加费用详情单model为例，我是在上传之前，直接把一个需要的数据放置在model内，然后再把model上传，因为服务器是可以接受可变字典这样的变量的
代码：
+ (void)addDriverFeeMonthDetailWithAsynch:(BOOL)asynch AddDriverFeeMonthDetailModel:(DateModel *)FeeMonthModel callBack:(CallBack)callBack
{
NSString *urlString;
urlString = [NSString stringWithFormat:@"%@/SubmitDriverFeeMonth" , SHARE_USER_CONTEXT.urlList.BASE_HOST];
NSMutableDictionary *dict = [NSMutableDictionary dictionary];
[dict setObject:[NSNumber numberWithInteger:FeeMonthModel.MonthID] forKey:@"MonthID"];
[dict setObject:[NSNumber numberWithInteger:FeeMonthModel.PostMonth] forKey:@"PostMonth"];
[dict setObject:[NSNumber numberWithInteger:FeeMonthModel.PostYear] forKey:@"PostYear"];
[dict setObject:[NSNumber numberWithInteger:FeeMonthModel.PicId] forKey:@"PicId"]; // picid，picurl 在修改的时候可以不上传，也就是不赋值即可
if (FeeMonthModel.PicUrl) {
[dict setObject:FeeMonthModel.PicUrl forKey:@"PicUrl"];
}
[dict setObject:[NSNumber numberWithDouble:FeeMonthModel.DriverBonus] forKey:@"DriverBonus"];
if (!FeeMonthModel.DriverBonusRemark.length || [FeeMonthModel.DriverBonusRemark isKindOfClass:[NSNull class]]) {
FeeMonthModel.DriverBonusRemark = @"";
}
[dict setObject:FeeMonthModel.DriverBonusRemark forKey:@"DriverBonusRemark"];
if (!FeeMonthModel.DriverName.length || [FeeMonthModel.DriverName isKindOfClass:[NSNull class]] ) {
FeeMonthModel.DriverName = @"";
}
[dict setObject:FeeMonthModel.DriverName forKey:@"DriverName"];
if (!FeeMonthModel.DriverNo.length || [FeeMonthModel.DriverNo isKindOfClass:[NSNull class]]) {
FeeMonthModel.DriverNo = @"";
}
[dict setObject:FeeMonthModel.DriverNo forKey:@"DriverNo"];
if (!FeeMonthModel.DriverPhone.length || [FeeMonthModel.DriverPhone isKindOfClass:[NSNull class]]) {
FeeMonthModel.DriverPhone = @"";
}
[dict setObject:FeeMonthModel.DriverPhone forKey:@"DriverPhone"];
if (FeeMonthModel.TotalAmount) {
[dict setObject:[NSNumber numberWithDouble:FeeMonthModel.TotalAmount] forKey:@"TotalAmount"];
}
if ([FeeMonthModel.LocalMoneyRemark isKindOfClass:[NSNull class]] || !FeeMonthModel.LocalMoneyRemark.length) {
FeeMonthModel.LocalMoneyRemark = @"";
}
[dict setObject:FeeMonthModel.LocalMoneyRemark forKey:@"LocalMoneyRemark"];
if (!FeeMonthModel.OrderNo.length || [FeeMonthModel.OrderNo isKindOfClass:[NSNull class]]) {
FeeMonthModel.OrderNo = @"";
}
[dict setObject:FeeMonthModel.OrderNo forKey:@"OrderNo"];
if (!FeeMonthModel.OtherMoneyRemark.length || [FeeMonthModel.OtherMoneyRemark isKindOfClass:[NSNull class]]) {
FeeMonthModel.OtherMoneyRemark = @"";
}
[dict setObject:FeeMonthModel.OtherMoneyRemark forKey:@"OtherMoneyRemark"];
if (FeeMonthModel.UltraKmActual) {
[dict setObject:[NSNumber numberWithDouble:FeeMonthModel.UltraKmActual] forKey:@"UltraKmActual"];
}
if (FeeMonthModel.UltraKmEnd) {
[dict setObject:[NSNumber numberWithDouble:FeeMonthModel.UltraKmEnd] forKey:@"UltraKmEnd"];
}
if (FeeMonthModel.UltraKmStart) {
[dict setObject:[NSNumber numberWithDouble:FeeMonthModel.UltraKmStart] forKey:@"UltraKmStart"];
}
[dict setObject:FeeMonthModel.DetailList forKey:@"DetailList"];
if (!FeeMonthModel.AcctName.length || [FeeMonthModel.AcctName isKindOfClass:[NSNull class]]) {
FeeMonthModel.AcctName = @"";
}
[dict setObject:FeeMonthModel.AcctName forKey:@"AcctName"];
[self httpRequestUrl:urlString httpMethod:HTTP_POST httpBody:dict normal:YES asynchronous:asynch callBack:callBack];
}
当然也是可以加一些非空判断的安全处理，比如
我把上传或者从服务器加载的数据model，通过加载非空的方法，来把空值赋予@“”，这样就不会崩掉了：
－ （NSMutableDictionary *)getUnnullDict:dict{
// 传入一个字典，通过遍历得到内部的value，来处理空的value
for (NSString *key in dict.allKeys){
if([dict objectForKey:key] isEqual:[NSNull null]){
[dict setValue:@"" forKey:key];
}
}
return dict;
}
