AFNetworking是一个非常方便的网络请求库，可以轻松实现各种网络请求，比如经常使用的GET请求、POST请求，以及上传多张图片等，下面介绍一下基本的使用方法。首先下载AFNetworking 然后在需要使用的类中，导入如下2个头文件：#import "AFNetworking.h"//主要用于网络请求方法#import "UIKit+AFNetworking.h"//里面有异步加载图片的方法GET请求网络数据方式：-(void)obtainData{ // 启动系统风火轮 [UIApplication sharedApplication].networkActivityIndicatorVisible = YES; //前面写服务器给的域名,后面拼接上需要提交的参数，假如参数是key＝1 NSString *domainStr = @"http://192.168.1.69/xffcol/index.php/Api/key/1/"; AFHTTPRequestOperationManager *manager = [AFHTTPRequestOperationManager manager]; manager.responseSerializer = [AFHTTPResponseSerializer serializer]; //以get的形式提交，只需要将上面的请求地址给GET做参数就可以 [manager GET:domainStr parameters:nil success:^(AFHTTPRequestOperation *operation, id responseObject) { // 隐藏系统风火轮 [UIApplication sharedApplication].networkActivityIndicatorVisible = NO; //json解析 NSDictionary *resultDic = [NSJSONSerialization JSONObjectWithData:responseObject options:NSJSONReadingMutableLeaves error:nil]; NSLog(@"---获取到的json格式的字典--%@",resultDic); } failure:^(AFHTTPRequestOperation *operation, NSError *error) { // 解析失败隐藏系统风火轮(可以打印error.userInfo查看错误信息) [UIApplication sharedApplication].networkActivityIndicatorVisible = NO; }];}POST请求网络数据方式:-(void)obtainData{ // 启动系统风火轮 [UIApplication sharedApplication].networkActivityIndicatorVisible = YES; //服务器给的域名 NSString *domainStr = @"http://192.168.1.69/xffcol/index.php/Api/"; //假如需要提交给服务器的参数是key＝1,class_id=100 //创建一个可变字典 NSMutableDictionary *parametersDic = [NSMutableDictionary dictionary]; //往字典里面添加需要提交的参数 [parametersDic setObject:@"1" forKey:@"key"]; [parametersDic setObject:@"100" forKey:@"class_id"]; AFHTTPRequestOperationManager *manager = [AFHTTPRequestOperationManager manager]; manager.responseSerializer = [AFHTTPResponseSerializer serializer]; //以post的形式提交，POST的参数就是上面的域名，parameters的参数是一个字典类型，将上面的字典作为它的参数 [manager POST:domainStr parameters:parametersDic success:^(AFHTTPRequestOperation *operation, id responseObject) { // 隐藏系统风火轮 [UIApplication sharedApplication].networkActivityIndicatorVisible = NO; //json解析 NSDictionary *resultDic = [NSJSONSerialization JSONObjectWithData:responseObject options:NSJSONReadingMutableLeaves error:nil]; NSLog(@"---获取到的json格式的字典--%@",resultDic); } failure:^(AFHTTPRequestOperation *operation, NSError *error) { // 解析失败隐藏系统风火轮(可以打印error.userInfo查看错误信息) [UIApplication sharedApplication].networkActivityIndicatorVisible = NO; }];}实现上传多张图片：-(void)uploadPictures{ //域名 NSString *domainStr = @"http://192.168.1.69/xffcol/index.php/Api/"; AFHTTPRequestOperationManager *manager = [AFHTTPRequestOperationManager manager]; manager.responseSerializer = [AFHTTPResponseSerializer serializer]; //如果还需要上传其他的参数，参考上面的POST请求，创建一个可变字典，存入需要提交的参数内容，作为parameters的参数提交 [manager POST:domainStr parameters:nil constructingBodyWithBlock:^(idformData)
{
//_imageArray就是图片数组，我的_imageArray里面存的都是图片的data，下面可以直接取出来使用，如果存的是image，将image转换data的方法如下：NSData *imageData = UIImageJPEGRepresentation(image, 0.7);
if (_imageArray.count > 0 ){
for(int i = 0;i < _imageArray.count;i ++){
NSData *data=_imageArray[i];
//上传的参数名
NSString *name = [NSString stringWithFormat:@"%d",i];
//上传的filename
NSString *fileName = [NSString stringWithFormat:@"%@.jpg",name];
[formData appendPartWithFileData:data
name:name
fileName:fileName
mimeType:@"image/jpeg"];
}
}
}success:^(AFHTTPRequestOperation *operation, id responseObject)
{
//关闭系统风火轮
[UIApplication sharedApplication].networkActivityIndicatorVisible = NO;
//json解析
NSDictionary * resultDic = [NSJSONSerialization JSONObjectWithData:responseObject options:NSJSONReadingMutableLeaves error:nil];
NSLog(@"---resultDic--%@",resultDic);
}
failure:^(AFHTTPRequestOperation *operation, NSError *error) {
// 解析失败
[UIApplication sharedApplication].networkActivityIndicatorVisible = NO;
}];
}
设置网络图片的方法：
[leftView setImageWithURL:[NSURL URLWithString:@"http://pic25.nipic.com/20121205/5955207_182136452000_2.jpg"] placeholderImage:@"这里是网络图片还没加载出来的时候，显示的默认图片"];
