1、iOS 17 真机调试问题

iOS 17之后，真机调试Beta版本必须使用Beta版本的Xcode来调试，用以前复制DeviceSupport 方式无法调试，新的Beta版本Xcode中，已经不包含 iOS 17目录。如下图：

解决方案：

1）下载最新的Beta 版本Xcode 15
2）运行命令defaults write com.apple.dt.Xcode DVTEnableCoreDevice enabled
此时旧版本Xcode 将会出现一个 CoreDevice ，这时候就可以继续Debug调试了

2、Xcode 15 Beta版本运行项目报错

运行旧版本项目编译报以下错误
Showing All Messages Assertion failed: (aliasSectionNum == sectionNum && "alias and its target must be located in the same section"), function assignAliasAtomOffsetInSection, file Layout.cpp, line 3248.

解决：Build Settings -> Other Linker Flags 中添加 -ld64

3、UIGraphicsBeginImageContextWithOptions 方法崩溃（Crash）

*** Assertion failure in void _UIGraphicsBeginImageContextWithOptions(CGSize, BOOL, CGFloat, BOOL)(), UIGraphics.m:410

解决方案：将下面代码替换

UIGraphicsBeginImageContextWithOptions(self.bounds.size, self.opaque, self.contentsScale);CGContextRef context = UIGraphicsGetCurrentContext();if (self.opaque) {CGSize size = self.bounds.size;size.width *= self.contentsScale;size.height *= self.contentsScale;CGContextSaveGState(context); {if (!self.backgroundColor || CGColorGetAlpha(self.backgroundColor) < 1) {CGContextSetFillColorWithColor(context, [UIColor whiteColor].CGColor);CGContextAddRect(context, CGRectMake(0, 0, size.width, size.height));CGContextFillPath(context);}if (self.backgroundColor) {CGContextSetFillColorWithColor(context, self.backgroundColor);CGContextAddRect(context, CGRectMake(0, 0, size.width, size.height));CGContextFillPath(context);}} CGContextRestoreGState(context);}task.display(context, self.bounds.size, ^{return NO;});UIImage *image = UIGraphicsGetImageFromCurrentImageContext();UIGraphicsEndImageContext();self.contents = (__bridge id)(image.CGImage);

替换为：

UIGraphicsImageRendererFormat *format = [[UIGraphicsImageRendererFormat alloc] init];format.opaque = self.opaque;format.scale = self.contentsScale;UIGraphicsImageRenderer *renderer = [[UIGraphicsImageRenderer alloc] initWithSize:self.bounds.size format:format];UIImage *image = [renderer imageWithActions:^(UIGraphicsImageRendererContext * _Nonnull rendererContext) {CGContextRef context = rendererContext.CGContext;if (self.opaque) {CGSize size = self.bounds.size;size.width *= self.contentsScale;size.height *= self.contentsScale;CGContextSaveGState(context); {if (!self.backgroundColor || CGColorGetAlpha(self.backgroundColor) < 1) {CGContextSetFillColorWithColor(context, [UIColor whiteColor].CGColor);CGContextAddRect(context, CGRectMake(0, 0, size.width, size.height));CGContextFillPath(context);}if (self.backgroundColor) {CGContextSetFillColorWithColor(context, self.backgroundColor);CGContextAddRect(context, CGRectMake(0, 0, size.width, size.height));CGContextFillPath(context);}} CGContextRestoreGState(context);}task.display(context, self.bounds.size, ^{return NO;});}];self.contents = (__bridge id)(image.CGImage);