UIGraphicsBeginImageContext Deprecated

[zhuwo]

大佬，我们这边使用了您的YYText，发现在iOS 17上运行会崩溃，触发了系统的断言：
UIGraphicsBeginImageContext() failed to allocate CGBitampContext: size={382, 0}, scale=3.000000, bitmapInfo=0x2002. Use UIGraphicsImageRenderer to avoid this assert.

查了下 api，发现UIGraphicsBeginImageContext在iOS 17上已经deprecated了，

大佬是否需要更新下

[w1090485608]

将
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);

[CodeSlaveZhang]

如果不想像上面一样处理
可以在

• (void)_displayAsync:(BOOL)async
  这个函数里面添加
  if (self.bounds.size.width<=0 || self.bounds.size.height<=0) {
  self.contents = nil;
  return;
  }

[wanghaolyj]

如果不想像上面一样处理 可以在

• (void)_displayAsync:(BOOL)async
  这个函数里面添加
  if (self.bounds.size.width<=0 || self.bounds.size.height<=0) {
  self.contents = nil;
  return;
  }

@implementation YYTextAsyncLayer(Hook)

• (void)load {
  Method a = class_getInstanceMethod(self, @selector(display));
  Method b = class_getInstanceMethod(self, @selector(swizzing_display));
  method_exchangeImplementations(a, b);
  }

• (void)swizzing_display{
  //通过变量名称获取类中的实例成员变量
  if (self.bounds.size.width<=0 || self.bounds.size.height<=0) {
  self.contents = nil;
  return;
  } else {
  [self swizzing_display];
  }
  }

@EnD

It's better to do this

[ZackDT]

Swift的话，采用上面一样的hook方法，在appdelegate方法中调用 YYTextAsyncLayer.swizzleDisplay

`
import YYText
/// 避免iOS17的崩溃
extension YYTextAsyncLayer {

static let swizzleDisplay: Void = {
    let originalSelector = #selector(display)
    let swizzledSelector = #selector(swizzing_display)
    
    guard let originalMethod = class_getInstanceMethod(YYTextAsyncLayer.self, originalSelector),
          let swizzledMethod = class_getInstanceMethod(YYTextAsyncLayer.self, swizzledSelector) else {
        return
    }
    
    method_exchangeImplementations(originalMethod, swizzledMethod)
}()

@objc func swizzing_display() {
    if bounds.size.width <= 0 || bounds.size.height <= 0 {
        contents = nil
        return
    } else {
        swizzing_display()
    }
}

}
`

[lizhi0123]

I do not want to change code in pods. so I create two classe. PPYYLabel, PPYYTextAsyncLayer . user PPYYLabel replace YYLabel

import Foundation
import YYText

///PPYYLabel 代替YYLabel ios17崩溃修复 
class PPYYLabel: YYLabel{
    override class var layerClass: AnyClass {
        return PPYYTextAsyncLayer.self
    }
}



import Foundation
import YYText

/// ios17崩溃修复 
class PPYYTextAsyncLayer: YYTextAsyncLayer {
    override func display() {
        if self.bounds.size.width<=0 || self.bounds.size.height<=0 {
            self.contents = nil
            return
        } else {
            print("---- bounds.width = , ",self.bounds.size.width , " ,height = ",self.bounds.size.height)
            super.display()
        }
    }
}

[zhoumingwu]

It seems like the master has retired from the scene for many years. It's unlikely that he will make a comeback again

[NubiaYin]

这个API还能继续用，只不过当layer的width或height 为0时会触发断言，否则不会。
这个场景在使用AutoLayout时比较常见。

[MonicaZhou]

如果不想像上面一样处理 可以在

* (void)_displayAsync:(BOOL)async
  这个函数里面添加
  if (self.bounds.size.width<=0 || self.bounds.size.height<=0) {
  self.contents = nil;
  return;
  }

最低支持iOS9的代码，得用这个~