[快速学会Swift第三方库] Alamofire篇
Alamofire是 Swift 语言的 HTTP 网络开发工具包，AFNetworking的 Swift 版，使用起来相当简单。
目录
编码之前
导入Alamofire
推荐使用CocoaPods进行导入，CocoaPods是一个负责管理iOS项目中第三方开源库的工具，安装CocoaPods之后使用命令行就能轻松地对所有第三方开源库进行安装和更新，而不需要每次上GitHub去下载。
CocoaPods的安装过程传送门：iOS 9 导入类库全面详尽过程（Ruby安装->CocoaPods安装->导入类库）
手动下载：GitHub-Alamofire 主页
装好CocoaPods后，修改Podfile文件内容为如下：
source 'https://github.com/CocoaPods/Specs.git'
platform :ios, '9.0'
use_frameworks!
target 'Web' do
pod 'Alamofire', '~> 3.4'
end
xcodeproj 'Desktop/Web/Web.xcodeproj'target后面为工程名，最后一行为工程路径(这里的Web是我的工程名)
再执行命令：
$ pod install其他操作
另外还需要在Target->工程名->Build Settings->Search Paths->User Header Search Paths处添加Alamofire所在的目录：
最后在你需要用到Alamofire的类中加上：
import AlamofireWeb请求
示例代码
func webRequst() {
Alamofire.request(.GET, "http://blog.csdn.net/sps900608", parameters: nil)
.responseData { (response) in
print("webRequest:\(response.result)")
//注意：webView需自定义！
self.webView.loadData(response.result.value!, MIMEType: "text/html", textEncodingName: "utf-8", baseURL: NSURL())
}
}运行结果：
webRequest:SUCCESS
数据请求（JSON）
示例代码
func jsonRequest() {
let parameters = [ "foo": "bar","baz": ["a", 1],"qux": ["x": 1,"y": 2,"z": 3]]
// HTTP body: foo=bar&baz[]=a&baz[]=1&qux[x]=1&qux[y]=2&qux[z]=3
Alamofire.request(.POST, "https://httpbin.org/post", parameters: parameters)
.responseJSON { (response) in
print("jsonRequest:\(response.result)")
if let JSON = response.result.value {
print("JSON: \(JSON)")
}
}
}运行结果
jsonRequest:SUCCESS
JSON: {
args = {
};
data = "";
files = {
};
form = {
"baz[]" = (
a,
1
);
foo = bar;
"qux[x]" = 1;
"qux[y]" = 2;
"qux[z]" = 3;
};
headers = {
Accept = "*/*";
"Accept-Encoding" = "gzip;q=1.0, compress;q=0.5";
"Accept-Language" = "en-US;q=1.0";
"Content-Length" = 70;
"Content-Type" = "application/x-www-form-urlencoded; charset=utf-8";
Host = "httpbin.org";
"User-Agent" = "Web/com.applelab.Web (1; OS Version 9.3 (Build 13E230))";
};
json = "<null>";
origin = "202.115.52.205";
url = "https://httpbin.org/post";
}
上传文件
示例代码
func upload() {
// 可任意拖一张图片到工程目录下重命名为“123.png”
let fileURL = NSBundle.mainBundle().URLForResource("123", withExtension: "png")!
Alamofire.upload(.POST, "https://httpbin.org/post", file: fileURL)
.progress { (bytesWritten, totalBytesWritten, totalBytesExpectedToWrite) in
//如果要修改界面UI，需要放到主线程中进行
dispatch_async(dispatch_get_main_queue()) {
print("Total bytes written on main queue: \(totalBytesWritten)")
}
}
.responseString { (response) in
debugPrint("uploadRequest:\(response)")
}
}运行结果
Total bytes written on main queue: 3538"uploadRequest:SUCCESS: {\n \"args\": {}, \n \"data\": \"data:application/octet-stream;base64,（此处省略文件data信息）==\", \n \"files\": {}, \n \"form\": {}, \n \"headers\": {\n \"Accept\": \"*/*\", \n \"Accept-Encoding\": \"gzip;q=1.0, compress;q=0.5\", \n \"Accept-Language\": \"en-US;q=1.0\", \n \"Content-Length\": \"3538\", \n \"Content-Type\": \"application/octet-stream\", \n \"Host\": \"httpbin.org\", \n \"User-Agent\": \"Web/com.applelab.Web (1; OS Version 9.3 (Build 13E230))\"\n }, \n \"json\": null, \n \"origin\": \"202.115.52.205\", \n \"url\": \"https://httpbin.org/post\"\n}\n"
下载文件
示例代码
func download() {
//设置下载目标路径为推荐下载目标路径
let destination = Alamofire.Request.suggestedDownloadDestination(directory: .DocumentDirectory, domain: .UserDomainMask)
//打印下载目标路径
print(NSSearchPathForDirectoriesInDomains(.DocumentDirectory, .UserDomainMask, true)[0])
Alamofire.download(.GET, "https://httpbin.org/stream/100", destination: destination)
.response { (_, _, _, error) in
if let error = error {
print("Failed with error: \(error)")
} else {
print("Downloaded file successfully")
}
}
}运行结果
/Users/nothinglhw/Library/Developer/CoreSimulator/Devices/560AA615-771E-499E-A8A9-AA6BE3781903/data/Containers/Data/Application/C715D9C3-57C9-40AF-88EC-EE4B86EB06D2/Documents
Downloaded file successfully如果是在模拟器中运行，打开该目录可以看到多了一个名字为“100”的文件：
打开该文件可以看到：
{"url": "https://httpbin.org/stream/100", "headers": {"Host": "httpbin.org", "Accept-Language": "en-US;q=1.0", "Accept-Encoding": "gzip;q=1.0, compress;q=0.5", "Accept": "*/*", "User-Agent": "Web/com.applelab.Web (1; OS Version 9.3 (Build 13E230))"}, "args": {}, "id": 0, "origin": "202.115.52.205"}
{"url": "https://httpbin.org/stream/100", "headers": {"Host": "httpbin.org", "Accept-Language": "en-US;q=1.0", "Accept-Encoding": "gzip;q=1.0, compress;q=0.5", "Accept": "*/*", "User-Agent": "Web/com.applelab.Web (1; OS Version 9.3 (Build 13E230))"}, "args": {}, "id": 1, "origin": "202.115.52.205"}
{"url": "https://httpbin.org/stream/100", "headers": {"Host": "httpbin.org", "Accept-Language": "en-US;q=1.0", "Accept-Encoding": "gzip;q=1.0, compress;q=0.5", "Accept": "*/*", "User-Agent": "Web/com.applelab.Web (1; OS Version 9.3 (Build 13E230))"}, "args": {}, "id": 2, "origin": "202.115.52.205"}
{"url": "https://httpbin.org/stream/100", "headers": {"Host": "httpbin.org", "Accept-Language": "en-US;q=1.0", "Accept-Encoding": "gzip;q=1.0, compress;q=0.5", "Accept": "*/*", "User-Agent": "Web/com.applelab.Web (1; OS Version 9.3 (Build 13E230))"}, "args": {}, "id": 3, "origin": "202.115.52.205"}
{"url": "https://httpbin.org/stream/100", "headers": {"Host": "httpbin.org", "Accept-Language": "en-US;q=1.0", "Accept-Encoding": "gzip;q=1.0, compress;q=0.5", "Accept": "*/*", "User-Agent": "Web/com.applelab.Web (1; OS Version 9.3 (Build 13E230))"}, "args": {}, "id": 4, "origin": "202.115.52.205"}
{"url": "https://httpbin.org/stream/100", "headers": {"Host": "httpbin.org", "Accept-Language": "en-US;q=1.0", "Accept-Encoding": "gzip;q=1.0, compress;q=0.5", "Accept": "*/*", "User-Agent": "Web/com.applelab.Web (1; OS Version 9.3 (Build 13E230))"}, "args": {}, "id": 5, "origin": "202.115.52.205"}
{"url": "https://httpbin.org/stream/100", "headers": {"Host": "httpbin.org", "Accept-Language": "en-US;q=1.0", "Accept-Encoding": "gzip;q=1.0, compress;q=0.5", "Accept": "*/*", "User-Agent": "Web/com.applelab.Web (1; OS Version 9.3 (Build 13E230))"}, "args": {}, "id": 6, "origin": "202.115.52.205"}深入学习
这里只列出了最常用的几种操作，如果你希望能够更加深入地学习Alamofire，可以前往GitHub-Alamofire主页 ！
