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1.

but did not return a nonzero exit code to indicate failure

解决方案

build settings -> compress PNG files -> NO

2.

or disable bitcode for this target

解决方案

build settings -> enable bitcode -> NO

3.

failed to get the task for process XXX

iOS真机调试程序，报以上错误信息

原因为证书问题，project和targets的证书都必须是开发证书，ADHOC的证书会出现此问题。

解决方案

将project和targets的Distribution改为Developement即可。

4.

library not found for –

这通常是由于工程在编译时找不到需要的链接库而导致的。

解决方案

targets -> build settings -> Library Search Path

添加缺失链接库的所在文件夹的路径

5.

App Transport Security has blocked a cleartext HTTP (http://)

iOS9 请求出现：

App Transport Security has blocked a cleartext HTTP (http://) resource load since it is insecure. Temporary exceptions can be configured via your app‘s Info.plist file.

苹果在iOS9中将原http协议改成了https协议，使用 TLS1.2 SSL加密请求数据。

解决方案
/** 在info.plist 加入key */
<key>NSAppTransportSecurity</key>
<dict>
<key>NSAllowsArbitraryLoads</key>
<true/>
</dict>

参考资料:

https://developer.apple.com/library/prerelease/ios/releasenotes/General/WhatsNewIniOS/Articles/iOS9.html#//apple_ref/doc/uid/TP40016198-DontLinkElementID_13

6.

xcode运行到真机报错 While reading xx.png pngcrush caught libpng

详见参考资料：

http://zfanxu.iteye.com/blog/1974113