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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"];
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原文地址:http://my.oschina.net/linxiaoxi1993/blog/477192