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UIAlertAction swizzling to better, more Swift-dependent method
[#142848761]
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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -1,69 +1,21 @@ | ||
| #import "UIAlertAction+Fleet.h" | ||
| #import <objc/runtime.h> | ||
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| @interface ObjectifiedBlock : NSObject | ||
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| @property (nonatomic, copy) void (^block)(UIAlertAction *); | ||
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| - (instancetype)initWithBlock:(void (^)(UIAlertAction *))block; | ||
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| @end | ||
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| @implementation ObjectifiedBlock | ||
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| - (instancetype)initWithBlock:(void (^)(UIAlertAction *))block { | ||
| if (self == [super init]) { | ||
| self.block = block; | ||
| } | ||
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| return self; | ||
| } | ||
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| @end | ||
| #import <UIKit/UIKit.h> | ||
| #import "FleetSwizzle.h" | ||
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| BOOL didSwizzleUIAlertAction = NO; | ||
| unsigned int handlerAssociatedKey = 0; | ||
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| @interface UIAlertAction (FleetPrivate) | ||
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| @property (nonatomic, copy) void (^fleet_property_handler)(UIAlertAction *); | ||
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| @end | ||
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| @implementation UIAlertAction (FleetPrivate) | ||
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| + (void)initialize { | ||
| if (self == [UIAlertAction class]) { | ||
| if (!didSwizzleUIAlertAction) { | ||
| [self swizzleHandlerSettler]; | ||
| [self objc_swizzleHandlerSetter]; | ||
| didSwizzleUIAlertAction = YES; | ||
| } | ||
| } | ||
| } | ||
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| + (void)swizzleHandlerSettler { | ||
| SEL originalSelector = NSSelectorFromString(@"setHandler:"); | ||
| SEL swizzledSelector = @selector(fleet_setHandler:); | ||
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| Method originalMethod = class_getInstanceMethod(self, originalSelector); | ||
| Method swizzledMethod = class_getInstanceMethod(self, swizzledSelector); | ||
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| method_exchangeImplementations(originalMethod, swizzledMethod); | ||
| } | ||
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| - (void)fleet_setHandler:(void (^)(UIAlertAction *))handler { | ||
| self.fleet_property_handler = handler; | ||
| [self fleet_setHandler: handler]; | ||
| } | ||
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| - (void (^)(UIAlertAction *))fleet_property_handler { | ||
| ObjectifiedBlock *block = objc_getAssociatedObject(self, &handlerAssociatedKey); | ||
| return [block block]; | ||
| } | ||
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| - (void)setFleet_property_handler:(void (^)(UIAlertAction *))fleet_property_handler { | ||
| ObjectifiedBlock *block = [[ObjectifiedBlock alloc] initWithBlock: fleet_property_handler]; | ||
| objc_setAssociatedObject(self, &handlerAssociatedKey, block, OBJC_ASSOCIATION_RETAIN); | ||
| + (void)objc_swizzleHandlerSetter { | ||
| memorySafeExecuteSelector(self, NSSelectorFromString(@"swizzleHandlerSetter")); | ||
| } | ||
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| @end |
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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1,47 @@ | ||
| import UIKit | ||
| import ObjectiveC | ||
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| private var handlerAssociatedKey: UInt = 0 | ||
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| @objc private class ObjectifiedBlock: NSObject { | ||
| var block: ((UIAlertAction) -> Void)? | ||
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| init(block: ((UIAlertAction) -> Void)?) { | ||
| self.block = block | ||
| } | ||
| } | ||
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| extension UIAlertAction { | ||
| var handler: ((UIAlertAction) -> Void)? { | ||
| get { | ||
| return fleet_property_handler | ||
| } | ||
| } | ||
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| @objc class func swizzleHandlerSetter() { | ||
| let originalSelector = Selector(("setHandler:")) | ||
| let swizzledSelector = #selector(UIAlertAction.fleet_setHandler(_:)) | ||
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| let originalMethod = class_getInstanceMethod(self, originalSelector) | ||
| let swizzledMethod = class_getInstanceMethod(self, swizzledSelector) | ||
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| method_exchangeImplementations(originalMethod, swizzledMethod) | ||
| } | ||
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| func fleet_setHandler(_ handler: ((UIAlertAction) -> Void)?) { | ||
| fleet_property_handler = handler | ||
| fleet_setHandler(handler) | ||
| } | ||
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| fileprivate var fleet_property_handler: ((UIAlertAction) -> Void)? { | ||
| get { | ||
| let block = objc_getAssociatedObject(self, &handlerAssociatedKey) as? ObjectifiedBlock | ||
| return block?.block | ||
| } | ||
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| set { | ||
| let block = ObjectifiedBlock(block: newValue) | ||
| objc_setAssociatedObject(self, &handlerAssociatedKey, block, objc_AssociationPolicy.OBJC_ASSOCIATION_RETAIN) | ||
| } | ||
| } | ||
| } |
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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -1,6 +1,5 @@ | ||
| #import <UIKit/UIKit.h> | ||
| #import "FleetObjC.h" | ||
| #import "UIAlertAction+Fleet.h" | ||
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| FOUNDATION_EXPORT double FleetVersionNumber; | ||
| FOUNDATION_EXPORT const unsigned char FleetVersionString[]; |