ios 9報(bào)警告如下:
CGContextSaveGState: invalid context 0x0. If you want to see the backtrace, please set CG_CONTEXT_SHOW_BACKTRACE environmental variable.
CGContextTranslateCTM: invalid context 0x0. If you want to see the backtrace, please set CG_CONTEXT_SHOW_BACKTRACE environmental variable.
CGContextRestoreGState: invalid context 0x0. If you want to see the backtrace, please set CG_CONTEXT_SHOW_BACKTRACE environmental variable.
原因:設(shè)置app的狀態(tài)欄樣式的使用使用了舊的方式,在info.plist里面設(shè)置了View controller-based status bar appearance為NO
解決方式:刪除info.plist中的View controller-based status bar appearance,并將狀態(tài)欄交給控制器管理