2014/10/15 下午 10:15:31

iphone Programming Glossary: unsafe

http://stackoverflow.com/questions/1151637/when-is-it-safe-to-release-an-nsthread

it. In general if an object cannot be safely disposed at arbitrary times it will retain itself while it is in an unsafe state and release itself when it can be safely disposed of. This is how things like NSThread and NSURLConnection work NSURLConnection..

what is the first step in (NSTimer release and invalidate)?

http://stackoverflow.com/questions/1171393/what-is-the-first-step-in-nstimer-release-and-invalidate

timer to nil is for safety. The call to invalidate will result in the timer being released by the run loop so it is unsafe to keep a reference that points to it. Setting the local reference to nil keeps things kosher. If however you create a timer..

core data update in background

http://stackoverflow.com/questions/15269768/core-data-update-in-background

Problem with a call button - doesn't open tel:// URL

http://stackoverflow.com/questions/2625274/problem-with-a-call-button-doesnt-open-tel-url

openURL NSURL URLWithString @ tel 18 It doesn't work and I get this message in the console warning Ignoring unsafe request to open URL tel 18 But I saw other application that have the same button fully working I am trying this on the device..

iPhone UINavigation Issue - nested push animation can result in corrupted navigation bar

http://stackoverflow.com/questions/5525519/iphone-uinavigation-issue-nested-push-animation-can-result-in-corrupted-naviga

objective-c interface - declaring variable vs just property?

http://stackoverflow.com/questions/9065417/objective-c-interface-declaring-variable-vs-just-property

vs just property In Obj c when declaring a variable within @interface @interface NSObject MyObject myObject @property unsafe nonatomic MyObject myObject Vs. Only declare it as a property @interface NSObject @property unsafe nonatomic MyObject myObject.. myObject @property unsafe nonatomic MyObject myObject Vs. Only declare it as a property @interface NSObject @property unsafe nonatomic MyObject myObject @end Not declare any var here Regards Christian iphone objective c share improve this question..