上传图片：
首先导入 afnemworking 这个库
AFHTTPRequestOperationManager *manager = [AFHTTPRequestOperationManager manager];
manager.responseSerializer.acceptableContentTypes = [NSSet setWithObject:@"text/html"];
NSDictionary *parameters =@{@"参数1":@"value1",@"参数2":@"value2"、、、};
NSData *imageData = UIImageJPEGRepresentation([UIImage imageNamed:@"1.png"], 1.0);
[manager POST:@"替换成你要访问的地址"parameters:parametersconstructingBodyWithBlock:^(id<AFMultipartFormData> formData) {
[formData appendPartWithFileData :imageData name:@"上传的图片参数" fileName:@"1.png" mimeType:@"image/jpeg"];
} success:^(AFHTTPRequestOperation *operation,id responseObject) {
NSLog(@"Success: %@", responseObject);
} failure:^(AFHTTPRequestOperation *operation,NSError *error) {
NSLog(@"Error: %@", error);
}];
这个方法可以上传图片，如果不用上传图片，可以把这句去掉[formData appendPartWithFileData :imageDataname:@"1"fileName:@"1.png"mimeType:@"image/jpeg"]
原文：http://www.cnblogs.com/wangxiaorui/p/5171129.html