网络解析封装类

来源：互联网发布：ember.js 官网编辑：程序博客网时间：2024/06/08 04:55

// 1. 创建请求

NSString *urlstr = [str stringByAddingPercentEscapesUsingEncoding:NSUTF8StringEncoding];

NSURL *url = [NSURL URLWithString:urlstr];

NSMutableURLRequest *request = [NSMutableURLRequest requestWithURL:url];

request.HTTPMethod = @"GET";

// 2. 发送请求

[NSURLConnection sendAsynchronousRequest:request queue:[NSOperationQueue mainQueue] completionHandler:^(NSURLResponse *response, NSData *data, NSError *connectionError) {

// 3. 处理数据

if (data == nil) {

// 请求不到数据时加载本地数据

NSString *path = [NSSearchPathForDirectoriesInDomains(NSDocumentDirectory, NSUserDomainMask, YES)lastObject];

NSString *str = [NSString stringWithFormat:@"%@.xml",ID];

NSString *strPath = [path stringByAppendingPathComponent:str];

data = [NSData dataWithContentsOfFile:strPath];

NSLog(@"str:%@",data);

block(data);

}

else{

// 有网时得到请求数据并更新本地数据

block(data);

NSString *path = [NSSearchPathForDirectoriesInDomains(NSDocumentDirectory, NSUserDomainMask, YES)lastObject];

NSString *str = [NSString stringWithFormat:@"%@.xml",ID];

NSString *strPath = [path stringByAppendingPathComponent:str];

[data writeToFile:strPath atomically:YES];

}

}];

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