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:^(id<AFMultipartFormData> formData)
{
//_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"];