解決帳號問題:點擊「Build and Run」,卻出現以下提示: Failed to code sign 「2048」. No provisioning profiles with a valid signing identity (i.e. certificate and private key pair) matching the bundle identifier 「com.facebook.8048」 were found. Xcode can attempt to fix this issue. This will reset your code signing and provisioning settings to recommended values and resolve issues with signing identities and provisioning profiles. 沒有提供一個合法的證書?xcode仍是很人性化的,直接有個按鈕Fix Issue,點擊它,而後提示輸入帳號密碼: 選擇choose ok,看起來問題已經fix了,再次點擊run,先看到「Build Succeded」,激動,成功了! 而後過又出來一個提示,這又是什麼鬼! Could not launch 「2048」 process lanch failed: Security