質問編集履歴
3
記載ミスの修正
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@@ -102,33 +102,4 @@
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他にスタイリッシュに記述する方法を教えていただけませんか？
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###補足情報(言語/FW/ツール等のバージョンなど)
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【swift3】【Xcode8.2.1】
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【swift3】【Xcode8.2.1】
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###セマフォ（デッドロック）
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```Swift
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import UIKit
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import Alamofire
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class ViewController: UIViewController {
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let semaphore = DispatchSemaphore(value: 0)
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override func viewDidLoad() {
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super.viewDidLoad()
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// Do any additional setup after loading the view, typically from a nib.
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test()
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}
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func test() {
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Alamofire.request("https://qiita.com/api/v2/items", method: .get).responseString { response in
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guard let object = response.result.value else { return }
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print(object)
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self.semaphore.signal()
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}
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print("waiting...")
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semaphore.wait()
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print("finish")
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}
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}
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```
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2
デッドロック
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@@ -105,38 +105,30 @@
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【swift3】【Xcode8.2.1】
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###
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###セマフォ（デッドロック）
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109
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```Swift
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110
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import UIKit
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111
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import Alamofire
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class ViewController: UIViewController {
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let semaphore = DispatchSemaphore(value: 0)
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override func viewDidLoad() {
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super.viewDidLoad()
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// Do any additional setup after loading the view, typically from a nib.
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DispatchQueue(label: "test").async {
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test()
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DispatchQueue(label: "test").asyncAfter(deadline: .now() + 5) {
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self.test2()
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DispatchQueue(label: "test").async {
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self.test3()
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}
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}
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}
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}
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func
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func test() {
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print("test1")
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}
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func test2() {
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print("test2-")
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}
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func test3() {
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Alamofire.request("https://qiita.com/api/v2/items", method: .get).
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Alamofire.request("https://qiita.com/api/v2/items", method: .get).responseString { response in
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guard let object = response.result.value else { return }
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print(object)
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self.semaphore.signal()
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}
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print("waiting...")
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semaphore.wait()
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print("finish")
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}
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-
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}
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134
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```
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1
GCDサンプル追加？
title
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File without changes
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body
CHANGED
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@@ -102,4 +102,41 @@
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102
102
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他にスタイリッシュに記述する方法を教えていただけませんか？
|
|
103
103
|
|
|
104
104
|
###補足情報(言語/FW/ツール等のバージョンなど)
|
|
105
|
-
【swift3】【Xcode8.2.1】
|
|
105
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+
【swift3】【Xcode8.2.1】
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106
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107
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###GCD？
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109
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```Swift
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110
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class ViewController: UIViewController {
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111
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112
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override func viewDidLoad() {
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113
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super.viewDidLoad()
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114
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// Do any additional setup after loading the view, typically from a nib.
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115
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DispatchQueue(label: "test").async {
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self.test1()
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DispatchQueue(label: "test").asyncAfter(deadline: .now() + 5) {
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self.test2()
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DispatchQueue(label: "test").async {
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self.test3()
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}
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}
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}
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}
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125
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126
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func test1() {
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print("test1")
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}
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129
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func test2() {
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print("test2-")
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}
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func test3() {
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135
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+
Alamofire.request("https://qiita.com/api/v2/items", method: .get).responseJSON { response in
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136
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guard let object = response.result.value else { return }
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137
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+
//この形だと値を返せない？
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138
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+
}
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139
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}
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140
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}
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```
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