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我刚开始为iOS编程。我尝试添加一个简单计算器的输入按钮并改变其大小，但Xcode不断崩溃。这是报告：Xcode不断崩溃
Process: Xcode [406]
Path: /Applications/Xcode.app/Contents/MacOS/Xcode
Identifier: com.apple.dt.Xcode
Version: 4.5.1 (1842)
Crashed Thread: 0 Dispatch queue: com.apple.main-thread
Exception Type: EXC_CRASH (SIGABRT)
Exception Codes: 0x0000000000000000, 0x0000000000000000
Application Specific Information:
ProductBuildVersion: 4G1004
ASSERTION FAILURE in /SourceCache/IDEInterfaceBuilderCocoaTouch/IDEInterfaceBuilderCocoaTouch-1929/IBPlugin/Utilities/IBObjectMarshalling.m:651
Details: Failed to arbitrate IBNSLayoutConstraint, IBUIButton, IBUILabel, IBUIView, and IBUIViewController.
Interface Builder encountered an error communicating with the iOS Simulator. If you choose to file a crash report or radar for this issue, please check Console.app for crash reports for "Interface Builder Cocoa Touch Tool" and include their content in your crash report.
Exception name: IBAssertionFailure
Exception reason: ASSERTION FAILURE:
Reason: All views needing candidate constraints have already had constraints generated. This most likely indicates a bug involving layout of the following views:
Layout engine frame ({{20, 20}, {282, 36}}) of <UILabel: 0x81f5560; frame = (20 20; 281 36); text = '0'; clipsToBounds = YES; opaque = NO; autoresize = TM+BM; userInteractionEnabled = NO; layer = <CALayer: 0x815cdd0>> does not match canvas frame ({{20, 20}, {281, 36}})
我已经尝试重新安装Xcode和重置iOS模拟器以及。我有山狮。
我的猜测是，你有一个损坏的xib fil即 –
确认您的约束条件具有不同于0的乘数 – Fogia