标签：
除苹果提供的NSURLConnection和NSURLRequest外第三方的网络框架
1 安装和配置MKNetworkKit框架
下载并打开MKNetworkKit目录添加MKNetworkKit文件夹到新工程中－添加支持的类库或框架 CFNetwork.framework SystemConfiguration.framework Security.framework-添加预编译头文件
＃ifndef MyNotes/MyNotes-Prefix.pch
＃define MyNotes/MyNotes-Prefix.pch
＃import <Foundation/foundation.h>
＃endif
2 网络请求
MKNetworkOperation：封装了请求相应的类，我们需要为每一个网络请求创建一个MKNetworkOperation。
MKNetworkEngine：负责管理网络队列，简单请求时直接使用，复杂情况时可以子类化MKNetworkEngine。
1）实现GET请求
/* * 开始请求Web Service */ -(void)startRequest { 设置请求路径，它是主机名（域名或ip地址）之后的内容。 NSString *path = [[NSString alloc] initWithFormat:@"/service/mynotes/WebService.php?email=%@&type=%@&action=%@",@"<你的51work6.com用户邮箱>",@"JSON",@"query"]; 创建MKNetworkEngine对象，参数是主机名和请求头，主机名前面不加http或www。 MKNetworkEngine *engine = [[MKNetworkEngine alloc] initWithHostName:@"51work6.com" customHeaderFields:nil];
创建MKNetworkOperation对象，参数是主机名之后的内容。其他参数有params：请求参数 httpMethod：指定请求方法 ssl：是否使用ssl加密请求 MKNetworkOperation *op = [engine operationWithPath:path]; 指定请求闭包，成功回调第一个代码块，失败回调第二个。 [op addCompletionHandler:^(MKNetworkOperation *operation) { 获取从服务器返回的NSData类数据 字符串 responseImage
NSLog(@"responseData : %@", [operation responseString]);
NSData *data = [operation responseData];
解析数据
NSDictionary *resDict = [NSJSONSerialization JSONObjectWithData:data options:NSJSONReadingAllowFragments error:nil]; [self reloadView:resDict]; } errorHandler:^(MKNetworkOperation *errorOp, NSError* err) { NSLog(@"MKNetwork请求错误 : %@", [err localizedDescription]); }];
开始发起请求 [engine enqueueOperation:op]; }
2）实现POST请求
/*
* 开始请求Web Service
*/
-(void)startRequest
{
NSString *path = [[NSString alloc] initWithFormat:@"/service/mynotes/WebService.php?email=%@&type=%@&action=%@",@"<你的51work6.com用户邮箱>",@"JSON",@"query"];
为MKNetworkOperation指定请求参数
NSMutableDictionary *param = [[NSMutableDictionary alloc] init];
[param setValue:@"<你的51work6.com用户邮箱>" forKey:@"email"];
[param setValue:@"JSON" forKey:@"type"];
[param setValue:@"query" forKey:@"action"];
MKNetworkEngine *engine = [[MKNetworkEngine alloc] initWithHostName:@"51work6.com" customHeaderFields:nil];
MKNetworkOperation *op = [engine operationWithPath:path params:param httpMethod:@"POST"];
[op addCompletionHandler:^(MKNetworkOperation *operation) {
NSLog(@"responseData : %@", [operation responseString]);
NSData *data = [operation responseData];
NSDictionary *resDict = [NSJSONSerialization JSONObjectWithData:data options:NSJSONReadingAllowFragments error:nil];
[self reloadView:resDict];
} errorHandler:^(MKNetworkOperation *errorOp, NSError* err) {
NSLog(@"MKNetwork请求错误 : %@", [err localizedDescription]);
}];
[engine enqueueOperation:op];
}
3 下载数据
MKNetworkOperation类不仅可以指定下载文件的位置，还可以获得下载的进度。
- (IBAction)onClick:(id)sender {
获取缓存目录
NSArray *paths = NSSearchPathForDirectoriesInDomains(NSCachesDirectory, NSUserDomainMask, YES);
NSString *cachesDirectory = paths[0];
NSString *downloadPath = [cachesDirectory stringByAppendingPathComponent:@"test1.jpg"];
NSString *path = [[NSString alloc] initWithFormat:@"/service/download.php?email=%@&FileName=test1.jpg",@"<你的51work6.com用户邮箱>"];
path = [path stringByAddingPercentEscapesUsingEncoding: NSUTF8StringEncoding];
MKNetworkEngine *engine = [[MKNetworkEngine alloc] initWithHostName:@"51work6.com" customHeaderFields:nil];
MKNetworkOperation *downloadOperation = [engine operationWithPath:path params:nil httpMethod:@"POST"];
添加NSOutputStream输出流对象，它指定下载图片的位置。
[downloadOperation addDownloadStream:[NSOutputStream outputStreamToFileAtPath:downloadPath append:TRUE]];
将下载进度进行日志输出
[downloadOperation onDownloadProgressChanged:^(double progress) {
NSLog(@"download progress: %.2f%%", progress*100.0);
_progressView.progress = progress;
}];
闭包
[downloadOperation addCompletionHandler:^(MKNetworkOperation *operation) {
NSLog(@"download file finished!");
NSData *data = [operation responseData];
if (data) {
//返回数据失败
NSError *eror;
NSDictionary *resDict = [NSJSONSerialization JSONObjectWithData:data options:NSJSONReadingAllowFragments error:&eror];
if (!resDict) {
NSNumber *resultCodeObj = [resDict objectForKey:@"ResultCode"];
NSString *errorStr = [resultCodeObj errorMessage];
UIAlertView *alertView = [[UIAlertView alloc] initWithTitle:@"错误信息"
message:errorStr
delegate:nil
cancelButtonTitle:@"OK"
otherButtonTitles: nil];
[alertView show];
}
} else {
//返回数据成功
UIImage *img = [UIImage imageWithContentsOfFile:downloadPath];
_imageView1.image = img;
}
} errorHandler:^(MKNetworkOperation *errorOp, NSError* err) {
NSLog(@"MKNetwork请求错误 : %@", [err localizedDescription]);
}];
[engine enqueueOperation:downloadOperation];
}
4 上传数据
- (IBAction)onClick:(id)sender { NSString *filePath = [[NSBundle mainBundle] pathForResource:@"test2" ofType:@"jpg"]; NSString *path = [[NSString alloc] initWithFormat:@"/service/upload.php"]; NSMutableDictionary *param = [[NSMutableDictionary alloc] init]; [param setValue:@"<你的51work6.com用户邮箱>" forKey:@"email"]; MKNetworkEngine *engine = [[MKNetworkEngine alloc] initWithHostName:@"51work6.com" customHeaderFields:nil]; MKNetworkOperation *op = [engine operationWithPath:path params:param httpMethod:@"POST"]; 提供要上传的文件路径和文件类型 [op addFile:filePath forKey:@"file"];
冻结操作：断网时保存数据 连网后自动上传保存的数据 [op setFreezable:YES]; [op addCompletionHandler:^(MKNetworkOperation *operation) { NSLog(@"Upload file finished!"); NSData *data = [operation responseData]; if (data) { NSError *eror; NSDictionary *resDict = [NSJSONSerialization JSONObjectWithData:data options:NSJSONReadingAllowFragments error:&eror]; if (resDict) {解析好的数据 NSNumber *resultCodeObj = [resDict objectForKey:@"ResultCode"]; NSString *errorStr = [resultCodeObj errorMessage];自定义 UIAlertView *alertView = [[UIAlertView alloc] initWithTitle:@"错误信息" message:errorStr delegate:nil cancelButtonTitle:@"OK" otherButtonTitles: nil]; [alertView show]; return ; } } [self seeImage]; } errorHandler:^(MKNetworkOperation *errorOp, NSError* err) { NSLog(@"MKNetwork请求错误 : %@", [err localizedDescription]); }]; [engine enqueueOperation:op]; }
iOS 开发指南 第15章 访问Web Service之使用轻量级网络请求架构MKNetworkKIt
标签：
原文地址：http://www.cnblogs.com/haugezi/p/4823437.html
