Numberwithbool
Webpublic Preferences putBoolean (String key, boolean val) { nsDictionary.put(key, NSNumber.numberWithBool(val)); Web2 aug. 2024 · iOS: カテゴリで値を保持する AssociatedObjectの利用 #import id objc_getAssociatedObject(id object, const void *key); void objc_setAssociatedObject(id object, const void *key, id value, policy); @dynamicプロパティのアクセサでget/setする @dynamic isTarget; - (BOOL)isTarget { NSNumber …
Numberwithbool
Did you know?
WebWhen is an NSNumber better than a BOOL?. I have a couple of macros that I define in my code: #define WO_YES [NSNumber numberWithBool:YES] #define WO_NO [NSNumber numberWithBool:NO] Webpublic Preferences putBoolean (String key, boolean val) { nsDictionary.put(key, NSNumber.numberWithBool(val));
WebThe BOOL type is used for boolean values in Objective-C. It has two values, YES, and NO, in contrast to the more common "true" and "false". Its behavior is straightforward and identical to the C language's. BOOL areEqual = (1 == 1); // areEqual is YES BOOL areNotEqual = !areEqual // areNotEqual is NO NSCAssert (areEqual, "Mathematics is a lie Web3 jun. 2015 · The difference is that by using @ you are creating an NSNumber instance, thus an object. Yes and No are simply primitive Boolean values not objects. The @ is a literal a sort of shortcut to create an object you have it also in strings @"something", dictionaries @ {"key": object}, arrays: @ [object,...] and numbers: @0,@1...@345 or …
Webif ([someNSNumberValue isEqualToNumber:[NSNumber numberWithBool:NO]]) { // ...} To get the bool value from a NSNumber use -(BOOL)boolValue: BOOL b = [num boolValue]; With that the comparison would be easier to read … Web26 jan. 2004 · >something else or really a BOOL created with numberWithBool. Here's a way to make NSDictionary implement nearly all of the same convenient methods that NSUserDefaults has: (only stringArrayForKey: is missing) @interface NSDictionary (ExtendedDictionary) - (NSString*)stringForKey:(NSString*)key; - …
Web23 dec. 2013 · To turn the NSNumber back into a BOOL use this: 1. 2. 3. BOOL anotherBool = [NSNumber numberWithBool:YES]; NSLog(@"anotherBool is %i", anotherBool); // gives 1 for YES and 0 for NO. Any NSNumber that is not zero will give a BOOL of YES when converted this way, including negative numbers. Jay is a medical miracle known as …
Web5 apr. 2016 · What I prefer though is [NSNumber numberWithBool:YES] as it is more readable sometimes if you go back to your code for debugging. @ (Yes) is the literal syntax for nsnumber, woks exactly the same when you … head cleaning not workingWeb26 jul. 2015 · ios把BOOL装换为OC对象:NSNumber *number = [NSNumber numberWithBool:boolValue];ios把OC对象装换为BOOL:BOOLboolValue = [boolNumbernumber]; ios把BOOL和OC对象互换 gx_wqm 于 2015-07-26 19:03:09 发布 … goldilocks and the 3 bears listening exerciseWeb8 feb. 2011 · If you want to insert BOOL type into core data, you can do it with NSNumber’s member method +numberWithBool: BOOL myBool = YES; NSNumber *boolAsNumber = [NSNumber numberWithBool:myBool]; //now you can pass boolAsNumber into you managed object for storage! If you want to retrieve a BOOL from NSNumber you can use … head cleaning of epson l380WebCreating an NSNumber Object + numberWithBool: Creates and returns an NSNumber object containing a given value, treating it as a BOOL. Example NSNumber *number = [NSNumber numberWithBool:YES]; NSLog(@"%@",number); head cleaning of epson l3150Web接受不同类型的参数值并返回NSNumber实例的使用了类工厂方法. 使用numberWithBool就创建NSCFBoolean工厂的实例, 使用numberWithInt就创建NSCFNumber的实例, 然后他们都实现了NSNumber抽象工厂类对象的的公有方法比如intValue、boolValue. goldilocks and the 3 bears houseWeb9 jul. 2024 · Solution 2. Sneaking in with the Swift 3/4 answer: let predicate = NSPredicate (format: "boolAttribute == %@", NSNumber (value: true) ) Copy. We have to use NSNumber apparently because a literal bool is not acceptable per Apple. Stolen from here ;) head cleaning of epson l3110WebInstantly share code, notes, and snippets. vinhnx / gist:4516644. Last active December 11, 2015 00:28 head cleaning of epson l3150 printer