cordova for ios: Unable to simultaneously satisfy constraints.

　　使用cordova开发ios项目的时候，在上传图片碰到一个问题。使用html的<input type="file"/>标签来选择照片或者拍照片，引起了布局报错，然后图片上传过程中很容易崩溃闪退。

html页面代码：

<html><head></head>

<body>

        <input type="file" />

    </body>

</html>

然后在真机测试，点击选择文件，控制台出现布局报错日志：

Unable to simultaneously satisfy constraints.

    Probably at least one of the constraints in the following list is one you don't want.

    Try this:

        () look at each constraint and try to figure out which you don't expect;

        () find the code that added the unwanted constraint or constraints and fix it.

(

    "<NSLayoutConstraint:0x156734e0 UILabel:0x1568b9f0.width == UIView:0x155d9110.width - 32>",

    "<NSLayoutConstraint:0x1568db80 UIView:0x155d9110.width == UIView:0x155d8fc0.width>",

    "<NSLayoutConstraint:0x156913b0 H:[UIView:0x155d8fc0(30)]>"

)

Will attempt to recover by breaking constraint

<NSLayoutConstraint:0x156734e0 UILabel:0x1568b9f0.width == UIView:0x155d9110.width - >

Make a symbolic breakpoint at UIViewAlertForUnsatisfiableConstraints to catch this in the debugger.

The methods in the UIConstraintBasedLayoutDebugging category on UIView listed in <UIKit/UIView.h> may also be helpful.

然后上传图片或者视频的时候，常会出现崩溃闪退现象。在cordova和phonegap搜了下，没搜到解决的办法，不知道哪位兄台又碰到这个问题么，指点我一下！

完整cordova for ios demo下载：http://download.csdn.net/detail/tandaxia/9455872

原文链接：http://www.cnblogs.com/tandaxia/p/5255394.html

巴特西

cordova for ios: Unable to simultaneously satisfy constraints.

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