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2014/10/15 ¤U¤È 10:10:14

iphone Programming Glossary: imp

If I override a class method, is there a way I can call the original method (the one that was overridden)?

http://stackoverflow.com/questions/3487828/if-i-override-a-class-method-is-there-a-way-i-can-call-the-original-method-the

case name your method MyCategory_method or so. class_getMethodImplementation and class_replaceMethod . Store the old IMP and call it directly. You need to get the method's type encoding. Note that you can just use a normal C function too.....

how to get selected text from uitextfield in iphone?

http://stackoverflow.com/questions/5230297/how-to-get-selected-text-from-uitextfield-in-iphone

self.inputDelegate SEL mySelector @selector mySelectionDidChange class_addMethod inputDelegateClass mySelector IMP mySelectionDidChange v@ @ Method myMethod class_getInstanceMethod inputDelegateClass mySelector Method uiKitMethod class_getInstanceMethod.. uiKitMethod myMethod swizzled swizzle NSLog @ swizzled i method_getImplementation uiKitMethod IMP venmo_selectionDidChange @end UIKIT_STATIC_INLINE void mySelectionDidChange id self SEL _cmd id UITextInput textInput Call..

What are the Dangers of Method Swizzling in Objective C?

http://stackoverflow.com/questions/5339276/what-are-the-dangers-of-method-swizzling-in-objective-c

@implementation NSView MyViewAdditions static void MySetFrame id self SEL _cmd NSRect frame static void SetFrameIMP id self SEL _cmd NSRect frame static void MySetFrame id self SEL _cmd NSRect frame do custom work SetFrameIMP self _cmd.. SetFrameIMP id self SEL _cmd NSRect frame static void MySetFrame id self SEL _cmd NSRect frame do custom work SetFrameIMP self _cmd frame void load self swizzle @selector setFrame with IMP MySetFrame store IMP SetFrameIMP @end While this looks.. self SEL _cmd NSRect frame do custom work SetFrameIMP self _cmd frame void load self swizzle @selector setFrame with IMP MySetFrame store IMP SetFrameIMP @end While this looks a little less like Objective C since it's using function pointers..

performSelector may cause a leak because its selector is unknown

http://stackoverflow.com/questions/7017281/performselector-may-cause-a-leak-because-its-selector-is-unknown

should simply be ignored and it's easy to work around. Here's how SEL selector NSSelectorFromString @ someMethod IMP imp _controller methodForSelector selector void func id SEL void imp func _controller selector Or more tersely though hard.. C runtime methods so you could do this directly with the runtime API as well . These function pointers are called IMP s and are simple typedef ed function pointers id IMP id SEL ... 1 . This may be close to the actual method signature of.. with the runtime API as well . These function pointers are called IMP s and are simple typedef ed function pointers id IMP id SEL ... 1 . This may be close to the actual method signature of the method but will not always match exactly. Once you..

iOS4 Implementation of -[NSURLConnection sendAsynchronousRequest:queue:completionHandler:]?

http://stackoverflow.com/questions/9829653/ios4-implementation-of-nsurlconnection-sendasynchronousrequestqueuecompletio

queue completionHandler if NSURLConnection instancesRespondToSelector class_addMethod self class sendAsyncSelector IMP sendAsynchronousRequest4 v@ @@@ @end #endif iphone objective c ios nsurlconnection nsurlconnectiondelegate share improve..

What are the Dangers of Method Swizzling in Objective C?

http://stackoverflow.com/questions/5339276/what-are-the-dangers-of-method-swizzling-in-objective-c

that it is a bit of a cheat. Method Swizzling is modifying the mapping so that calling selector A will actually invoke implementation B. One use of this is to extend behavior of closed source classes. Can we formalise the risks so that anyone.. huge manor of problems. Reduce the risk by sensibly naming swizzled methods. iphone objective c ios swizzling share improve this question I think this is a really great question and it's a shame that rather than tackling the real question.. great question and it's a shame that rather than tackling the real question most answers have skirted the issue and simply said not to use swizzling. Using method sizzling is like using sharp knives in the kitchen. Some people are scared of..

performSelector may cause a leak because its selector is unknown

http://stackoverflow.com/questions/7017281/performselector-may-cause-a-leak-because-its-selector-is-unknown

can I change my code so that I don't get this warning anymore iphone objective c ios automatic ref counting share improve this question Solution The compiler is warning about this for a reason. It's very rare that this warning should simply.. this question Solution The compiler is warning about this for a reason. It's very rare that this warning should simply be ignored and it's easy to work around. Here's how SEL selector NSSelectorFromString @ someMethod IMP imp _controller.. should simply be ignored and it's easy to work around. Here's how SEL selector NSSelectorFromString @ someMethod IMP imp _controller methodForSelector selector void func id SEL void imp func _controller selector Or more tersely though hard to..