diff --git a/Demo/YYKitDemo.xcodeproj/project.xcworkspace/xcshareddata/IDEWorkspaceChecks.plist b/Demo/YYKitDemo.xcodeproj/project.xcworkspace/xcshareddata/IDEWorkspaceChecks.plist
new file mode 100644
index 00000000..18d98100
--- /dev/null
+++ b/Demo/YYKitDemo.xcodeproj/project.xcworkspace/xcshareddata/IDEWorkspaceChecks.plist
@@ -0,0 +1,8 @@
+<?xml version="1.0" encoding="UTF-8"?>
+<!DOCTYPE plist PUBLIC "-//Apple//DTD PLIST 1.0//EN" "http://www.apple.com/DTDs/PropertyList-1.0.dtd">
+<plist version="1.0">
+<dict>
+	<key>IDEDidComputeMac32BitWarning</key>
+	<true/>
+</dict>
+</plist>
diff --git a/YYKit/Base/Quartz/CALayer+YYAdd.m b/YYKit/Base/Quartz/CALayer+YYAdd.m
index 2f6b1c0a..8ebfe793 100644
--- a/YYKit/Base/Quartz/CALayer+YYAdd.m
+++ b/YYKit/Base/Quartz/CALayer+YYAdd.m
@@ -19,6 +19,7 @@
 @implementation CALayer (YYAdd)
 
 - (UIImage *)snapshotImage {
+    if (self.bounds.size.width <= 0 || self.bounds.size.height <= 0) return nil;
     UIGraphicsBeginImageContextWithOptions(self.bounds.size, self.opaque, 0);
     CGContextRef context = UIGraphicsGetCurrentContext();
     [self renderInContext:context];
diff --git a/YYKit/Base/UIKit/UIImage+YYAdd.m b/YYKit/Base/UIKit/UIImage+YYAdd.m
index 357d3106..53d057b1 100644
--- a/YYKit/Base/UIKit/UIImage+YYAdd.m
+++ b/YYKit/Base/UIKit/UIImage+YYAdd.m
@@ -264,6 +264,7 @@ + (UIImage *)imageWithColor:(UIColor *)color size:(CGSize)size {
 
 + (UIImage *)imageWithSize:(CGSize)size drawBlock:(void (^)(CGContextRef context))drawBlock {
     if (!drawBlock) return nil;
+    if (size.width <= 0 || size.height <= 0) return nil;
     UIGraphicsBeginImageContextWithOptions(size, NO, 0);
     CGContextRef context = UIGraphicsGetCurrentContext();
     if (!context) return nil;
@@ -371,6 +372,7 @@ - (UIImage *)imageByRoundCornerRadius:(CGFloat)radius
                           borderWidth:(CGFloat)borderWidth
                           borderColor:(UIColor *)borderColor
                        borderLineJoin:(CGLineJoin)borderLineJoin {
+    if (self.size.width <= 0 || self.size.height <= 0) return nil;
     
     if (corners != UIRectCornerAllCorners) {
         UIRectCorner tmp = 0;
@@ -500,6 +502,7 @@ - (UIImage *)imageByFlipHorizontal {
 }
 
 - (UIImage *)imageByTintColor:(UIColor *)color {
+    if (self.size.width <= 0 || self.size.height <= 0) return nil;
     UIGraphicsBeginImageContextWithOptions(self.size, NO, self.scale);
     CGRect rect = CGRectMake(0, 0, self.size.width, self.size.height);
     [color set];
@@ -714,6 +717,7 @@ - (UIImage *)_yy_mergeImageRef:(CGImageRef)effectCGImage
                  tintBlendMode:(CGBlendMode)tintBlendMode
                      maskImage:(UIImage *)maskImage
                         opaque:(BOOL)opaque {
+    if (self.size.width <= 0 || self.size.height <= 0) return nil;
     BOOL hasTint = tintColor != nil && CGColorGetAlpha(tintColor.CGColor) > __FLT_EPSILON__;
     BOOL hasMask = maskImage != nil;
     CGSize size = self.size;
diff --git a/YYKit/Base/UIKit/UIView+YYAdd.m b/YYKit/Base/UIKit/UIView+YYAdd.m
index 36f9e83c..3d0bb95f 100644
--- a/YYKit/Base/UIKit/UIView+YYAdd.m
+++ b/YYKit/Base/UIKit/UIView+YYAdd.m
@@ -19,6 +19,7 @@
 @implementation UIView (YYAdd)
 
 - (UIImage *)snapshotImage {
+    if (self.bounds.size.width <= 0 || self.bounds.size.height <= 0) return nil;
     UIGraphicsBeginImageContextWithOptions(self.bounds.size, self.opaque, 0);
     [self.layer renderInContext:UIGraphicsGetCurrentContext()];
     UIImage *snap = UIGraphicsGetImageFromCurrentImageContext();
@@ -30,6 +31,7 @@ - (UIImage *)snapshotImageAfterScreenUpdates:(BOOL)afterUpdates {
     if (![self respondsToSelector:@selector(drawViewHierarchyInRect:afterScreenUpdates:)]) {
         return [self snapshotImage];
     }
+    if (self.bounds.size.width <= 0 || self.bounds.size.height <= 0) return nil;
     UIGraphicsBeginImageContextWithOptions(self.bounds.size, self.opaque, 0);
     [self drawViewHierarchyInRect:self.bounds afterScreenUpdates:afterUpdates];
     UIImage *snap = UIGraphicsGetImageFromCurrentImageContext();
diff --git a/YYKit/Utility/YYAsyncLayer.m b/YYKit/Utility/YYAsyncLayer.m
index 9a5c6dc5..9036fdb6 100644
--- a/YYKit/Utility/YYAsyncLayer.m
+++ b/YYKit/Utility/YYAsyncLayer.m
@@ -145,33 +145,32 @@ - (void)_displayAsync:(BOOL)async {
                 CGColorRelease(backgroundColor);
                 return;
             }
-            UIGraphicsBeginImageContextWithOptions(size, opaque, scale);
-            CGContextRef context = UIGraphicsGetCurrentContext();
-            if (opaque && context) {
-                CGContextSaveGState(context); {
-                    if (!backgroundColor || CGColorGetAlpha(backgroundColor) < 1) {
-                        CGContextSetFillColorWithColor(context, [UIColor whiteColor].CGColor);
-                        CGContextAddRect(context, CGRectMake(0, 0, size.width * scale, size.height * scale));
-                        CGContextFillPath(context);
-                    }
-                    if (backgroundColor) {
-                        CGContextSetFillColorWithColor(context, backgroundColor);
-                        CGContextAddRect(context, CGRectMake(0, 0, size.width * scale, size.height * scale));
-                        CGContextFillPath(context);
-                    }
-                } CGContextRestoreGState(context);
-                CGColorRelease(backgroundColor);
-            }
-            task.display(context, size, isCancelled);
-            if (isCancelled()) {
-                UIGraphicsEndImageContext();
-                dispatch_async(dispatch_get_main_queue(), ^{
-                    if (task.didDisplay) task.didDisplay(self, NO);
-                });
-                return;
-            }
-            UIImage *image = UIGraphicsGetImageFromCurrentImageContext();
-            UIGraphicsEndImageContext();
+            
+            UIGraphicsImageRenderer *renderer = [[UIGraphicsImageRenderer alloc] initWithSize:size];
+            UIImage *image = [renderer imageWithActions:^(UIGraphicsImageRendererContext * _Nonnull context) {
+                if (opaque) {
+                    CGContextSaveGState(context.CGContext); {
+                        if (!backgroundColor || CGColorGetAlpha(backgroundColor) < 1) {
+                            CGContextSetFillColorWithColor(context.CGContext, [UIColor whiteColor].CGColor);
+                            CGContextAddRect(context.CGContext, CGRectMake(0, 0, size.width * scale, size.height * scale));
+                            CGContextFillPath(context.CGContext);
+                        }
+                        if (backgroundColor) {
+                            CGContextSetFillColorWithColor(context.CGContext, backgroundColor);
+                            CGContextAddRect(context.CGContext, CGRectMake(0, 0, size.width * scale, size.height * scale));
+                            CGContextFillPath(context.CGContext);
+                        }
+                    } CGContextRestoreGState(context.CGContext);
+                    CGColorRelease(backgroundColor);
+                }
+                task.display(context.CGContext, size, isCancelled);
+                if (isCancelled()) {
+                    dispatch_async(dispatch_get_main_queue(), ^{
+                        if (task.didDisplay) task.didDisplay(self, NO);
+                    });
+                    return;
+                }
+            }];
             if (isCancelled()) {
                 dispatch_async(dispatch_get_main_queue(), ^{
                     if (task.didDisplay) task.didDisplay(self, NO);
@@ -190,28 +189,29 @@ - (void)_displayAsync:(BOOL)async {
     } else {
         [_sentinel increase];
         if (task.willDisplay) task.willDisplay(self);
-        UIGraphicsBeginImageContextWithOptions(self.bounds.size, self.opaque, self.contentsScale);
-        CGContextRef context = UIGraphicsGetCurrentContext();
-        if (self.opaque && context) {
-            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();
+        CGSize size = self.bounds.size;
+        BOOL opaque = self.opaque;
+        CGFloat scale = self.contentsScale;
+        CGColorRef backgroundColor = (opaque && self.backgroundColor) ? CGColorRetain(self.backgroundColor) : NULL;
+        UIGraphicsImageRenderer *renderer = [[UIGraphicsImageRenderer alloc] initWithSize:size];
+        UIImage *image = [renderer imageWithActions:^(UIGraphicsImageRendererContext * _Nonnull context) {
+            if (opaque) {
+                CGContextSaveGState(context.CGContext); {
+                    if (!backgroundColor || CGColorGetAlpha(backgroundColor) < 1) {
+                        CGContextSetFillColorWithColor(context.CGContext, [UIColor whiteColor].CGColor);
+                        CGContextAddRect(context.CGContext, CGRectMake(0, 0, size.width * scale, size.height * scale));
+                        CGContextFillPath(context.CGContext);
+                    }
+                    if (backgroundColor) {
+                        CGContextSetFillColorWithColor(context.CGContext, backgroundColor);
+                        CGContextAddRect(context.CGContext, CGRectMake(0, 0, size.width * scale, size.height * scale));
+                        CGContextFillPath(context.CGContext);
+                    }
+                } CGContextRestoreGState(context.CGContext);
+                CGColorRelease(backgroundColor);
+            }
+            task.display((__bridge CGContextRef _Nonnull)(context), self.bounds.size, ^{return NO;});
+        }];
         self.contents = (__bridge id)(image.CGImage);
         if (task.didDisplay) task.didDisplay(self, YES);
     }