AFNetworking与MJExtension处理后台_图片框架SDWebImage(初稿)

1.AFNetworking框架处理用户一般的POST GET等5种类型的请求

GET请求：

AFHTTPRequestOperationManager *mgr=[AFHTTPRequestOperationManager manager];

    NSMutableDictionary *params=[NSMutableDictionary dictionary];
    [params setObject:account.access_token forKey:@"access_token"];

    [mgr GET:@"https://api.weibo.com/2/statuses/friends_timeline.json" parameters:params success:^(AFHTTPRequestOperation *operation, NSDictionary *responseObject) {

        NSArray *newStatus=[WBStatus objectArrayWithKeyValuesArray:responseObject[@"statuses"]];
        NSIndexSet *set=[[NSIndexSet alloc] initWithIndexesInRange:NSMakeRange(0, newStatus.count)];
        [self.statues insertObjects:newStatus atIndexes:set];
        [self.tableView reloadData];

    } failure:^(AFHTTPRequestOperation *operation, NSError *error) {
        NSLog(@"%@",[error localizedDescription]);
    }];

POST请求：

AFHTTPRequestOperationManager *mgr=[AFHTTPRequestOperationManager manager];

    NSMutableDictionary *param=[NSMutableDictionary dictionary];
    [param setObject:@"43435345453 forKey:@"client_id"];
    [param setObject:@"354083454f535fv53c53d97" forKey:@"client_secret"];
    [param setObject:@"authorization_code" forKey:@"grant_type"];
    [param setObject:@"http://www.baidu.com" forKey:@"redirect_uri"];
    [param setObject:code forKey:@"code"];

    [mgr POST:@"https://api.weibo.com/oauth2/access_token" parameters:param success:^(AFHTTPRequestOperation *operation, NSDictionary *responseObject) {

    } failure:^(AFHTTPRequestOperation *operation, NSError *error) {

    }];

2.MJExtension用户直接处理Dictionary与Bean之间的转换

#import <Foundation/Foundation.h>
#import "WBUser.h"

@interface WBStatus : NSObject

@property (nonatomic,copy) NSString *text;

@property (nonatomic,copy) NSString *idStr;

@property (nonatomic,strong) WBUser *user;

@end

对应的json:

"statuses": [
{
"id": 11488058246,
"text": "求关注。"，
...

"user": {
"id": 1404376560,
"name": "zaku",
"description": "人生五十年，乃如梦如幻；有生斯有死，壮士复何憾。",
"url": "http://blog.sina.com.cn/zaku",
"profile_image_url": "http://tp1.sinaimg.cn/1404376560/50/0/1",
...
}
},
...
]

如下示例将json转换成数据，转换如下：

#import "MJExtension.h"
NSArray *newStatus=[WBStatus objectArrayWithKeyValuesArray:jsonStr];

3.图片显示框架SDWebImage

#import "UIImageView+WebCache.h"
NSURL *url=[NSURL URLWithString:urlStr];
UIImage *placehoder = [UIImage imageNamed:@"default_image"];
[imageView sd_setImageWithURL:url placeholderImage:placehoder];

应用无内存时 关闭下载清理内存

-(void)applicationDidReceiveMemoryWarning:(UIApplication *)application
{
    SDWebImageManager *mgr=[SDWebImageManager sharedManager];

    [mgr cancelAll];

    [mgr.imageCache clearMemory];

}