AFNetworking提供了非常强大而实用的网络操作API,结合使用NSURL和NSRequest来实现具体的网络操作。
1,Objective-C版本:
以获取twitter的一个接口文件为例
#import <AFNetworking/AFNetworking.h>
NSURL *url = [NSURL URLWithString:@"http://api.twitter.com/1/statuses/public_timeline.json"];
NSURLRequest *request = [NSURLRequest requestWithURL: url];
// 使用AFJSONRequestOperation用于处理JSON格式的response数据。
// 同理还有AFXMLRequestOperation,AFPropertyListRequestOperation,
// AFImageRequestOperation等,都是AFHTTPRequestOperation的子类。
AFJSONRequestOperation *operation = [AFJSONRequestOperation JSONRequestOperationWithRequest: request
success:^(NSURLRequest *request, NSHTTPURLResponse *response, id JSON) {
NSLog(@"Public Timeline: %@", JSON);
} failure:nil];
[operation start];
说实话,IOS中的写法真是繁琐,不过字面意思确实表达足够精确。
2,Swift中
若要使用AFNetworking,可将AFNetworking的目录拖至项目中。在项目的工程中建立一个Bridging-Header.h头文件,其中#import “AFNetworking/AFNetworking.h”,
然后在工程的build settings里边寻找bridging,添加指定的bridge文件Bridging-Header.h,即在Swift工程中导入了OC的类库。
下边的例子,根据latitude和longitude来获取天气信息
fun updateWeatherInfo(latitude: CLLocationDegrees, longitude: CLLocationDegrees) {
let manager = AFHTTPRequestOperationManager()
let url = "http://api.openweathermap.org/data/2.5/weather"
let params = ["lat": latitude, "lon": longitude, "cnt": 0]
manager.GET(url,
parameters: params,
success: { (operation: AFHTTPRequestOperation!,
responseObject: AnyObject!) in
println("JSON: " + responseObject.description!)
self.updateUISuccess(responseObject as NSDictionary!)
},
failure: { (operation: AFHTTPRequestOperation!,
error: NSError!) in
println("Error: " + error.localizedDescription)
self.loading.text = "Internet appears down!"
}
)
}