2014/10/15 下午 10:13:38

iphone Programming Glossary: safer

http://stackoverflow.com/questions/10310651/how-to-change-tab-bar-color-in-xcode

improve this question tabBar.tintColor UIColor greenColor will crash if your IOS version is not IOS 5 see the docs a safer approach is if tabBarController.tabBar respondsToSelector @selector setTintColor tabBarController.tabBar setTintColor color..

are push notification tokens unique across all apps for a single device?

http://stackoverflow.com/questions/2751481/are-push-notification-tokens-unique-across-all-apps-for-a-single-device

a single user might have your app installed on multiple devices legally iPhone and iPad for instance it will be much safer to have a many to many relationship between users and device tokens to be on the safe side. And since you mentioned Urban..

How to pass double[][] into a method call?

http://stackoverflow.com/questions/3216800/how-to-pass-double-into-a-method-call

of filter double row0 3 0 0 0 double row1 3 0 1 0 double row2 3 0 0 0 double filter 3 row0 row1 row2 It's probably safer to malloc all of those arrays since otherwise you're going to end up with references to stack variables in your filter class..

App Crashing when using large images on iOS 4.0

http://stackoverflow.com/questions/3679457/app-crashing-when-using-large-images-on-ios-4-0

2 million pixels seemed to work reliably on my 3G but hotpaw2's answer seems to suggest that 1 million pixels may be a safer bet . UIImage image ... if image.size.width image.size.height MAX_PIXELS calculate the scaling factor that will reduce the..

How to Perform a Insert/Update With Core Data

http://stackoverflow.com/questions/4102460/how-to-perform-a-insert-update-with-core-data

into the context in a loop and then save after the loop ends. The other method isn't much different but is much safer in terms of type safety. If you have generated model classes which you can do from the xcdatamodels then you can simply..

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

are scared of sharp knives because they think they'll cut themselves badly but the truth is that sharp knives are safer . Method swizzling can be used to write better more efficient more maintainable code. It can also be abused and lead to..

initWithFrame:frame] vs. [UIButton buttonWithType]

http://stackoverflow.com/questions/6245882/initwithframeframe-vs-uibutton-buttonwithtype

. Pros Cons You could argue that it's clearer to use buttonWithType and set buttonType explicitly and that it's safer in case Apple changes UIButtonTypeCustom to be 1 instead of 0 which will most certainly never happen . On the other hand..

Syncing objects between two disparate systems, best approach?

http://stackoverflow.com/questions/636675/syncing-objects-between-two-disparate-systems-best-approach

where updated_at @last_sync_at . Down side this approach doesn't tolerate clock skew very well at all. It is probably safer to keep a version number column that is incremented each time a row is updated so that clock skew doesn't foul your sync..

how to impliment payment-gateway with iphone application?

http://stackoverflow.com/questions/6689019/how-to-impliment-payment-gateway-with-iphone-application

your feature and make sure that your paypal functionality satisfies the guidelines Apple's InApp Purchase. This is safer since Apple takes care of Transactions Only problem is Apple takes some of money for themselves. Refer http troybrant.net..

Distinguish between iPhone 4 and iPhone 4S

http://stackoverflow.com/questions/8036891/distinguish-between-iphone-4-and-iphone-4s

may also be called iPhone3 3 in the case of the CDMA model here is a not quite up to date list . In general it is much safer and forward compatible to test for the capabilities of the platform e.g. someSystemClass respondsToSelector @selector someMethodName..

To ARC or not to ARC? What are the pros and cons?

http://stackoverflow.com/questions/8760431/to-arc-or-not-to-arc-what-are-the-pros-and-cons

share improve this question There is no downside. Use it. Do it today. It is faster than your old code. It is safer than your old code. It is easier than your old code. It is not garbage collection. It has no GC runtime cost. The compiler..

MKMapView annotations changing/losing order?

http://stackoverflow.com/questions/9539802/mkmapview-annotations-changing-losing-order

don't assume the annotation will be of type MyClass . If you turn on showsUserLocation that won't be the case. It's safer to declare the parameter as id MKAnnotation and then if necessary check what its class is and then cast it. share improve..