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Recent questions tagged objective
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objective c - Selecting all the items in UICollectionView iOS, even the cells that are not visible
I am in the middle of creating an application where I have a button on a tool bar which selects all the items ... visible to the user? Thanks J See Question&Answers more detail:os...
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679
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objective c - Error getting valueForKey in an NSDictionary for key containing @ character
I am trying to get the value of "@type" key in the following NSDictionary named 'robotDesign' robotDesign : ... but with their respective keys. See Question&Answers more detail:os...
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Oct 24, 2021
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objective c - How do I read image files directly from a zip without extracting to disk?
What I want to do is assign images to ui elements at runtime (think Winamp style) but I have no idea how to ... a mac with cocoa and objective c See Question&Answers more detail:os...
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Oct 24, 2021
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425
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objective c - Convert NSString of a math equation to a value
I would like to know how to evaluate a string representation of an equation as if it were a real equation: if(@" ... How can I get this to work? See Question&Answers more detail:os...
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Oct 24, 2021
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484
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objective c - Add safari bookmark from iPhone app
I'd like to have my application be able to add bookmarks to safari programmatically, is this possible? See Question&Answers more detail:os...
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Oct 24, 2021
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Technique[技术]
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673
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objective c - how to change tabBar icon color in ios
My current tab bar looks as follows: My code is as follows: -(void)startTabBar{ self.tabBarController = [[ ... anyone help to do this? See Question&Answers more detail:os...
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Oct 24, 2021
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Technique[技术]
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objective
0
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824
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objective c - CFURLCreateStringByAddingPercentEscapes is deprecated in iOS 9, how do I use "stringByAddingPercentEncodingWithAllowedCharacters"
I have the following code: return (NSString *)CFURLCreateStringByAddingPercentEscapes(kCFAllocatorDefault, (CFStringRef)string, ... ? Thanks! See Question&Answers more detail:os...
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Oct 24, 2021
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Technique[技术]
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71.8m
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0
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464
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1
answer
objective c - CIDetector isn't releasing memory
I'm using CIDetector as follows multiple times: -(NSArray *)detect:(UIImage *)inimage { UIImage *inputimage = ... memory leak in my code? See Question&Answers more detail:os...
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Oct 24, 2021
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Technique[技术]
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391
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objective c - Multi-dimensional NSArray object
Is there a way to create two dimensional NSArray without nesting arrays in the primitive format aFloatArray[][]. Thank you. See Question&Answers more detail:os...
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Oct 24, 2021
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Technique[技术]
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582
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objective c - NSTimer not firing
I have an NSTimer that I init with this code: testTimer = [[NSTimer alloc] initWithFireDate:[new objectAtIndex:0 ... know why this is happening? See Question&Answers more detail:os...
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Oct 24, 2021
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Technique[技术]
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513
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objective c - Reachability not working when wi-fi connected but no internet
I am using Apple's reachability code, and am setting up both initial notifications on when network ... network connectivity? Thanks! See Question&Answers more detail:os...
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Oct 24, 2021
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Technique[技术]
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objective
0
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381
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objective c - Sorting with sortedArrayUsingDescriptors and Key Paths
I have an unordered array with instances of the following class: @interface Place : NSObject { } @property (nonatomic ... What am I doing wrong? See Question&Answers more detail:os...
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Oct 24, 2021
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Technique[技术]
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71.8m
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objective
0
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543
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answer
objective c - How to find indexPath for tapped accessory button in tableView
I've simple UITableView with one section and few rows. When user clicks cell accessory button (which is connected ... = annotation.title; } } See Question&Answers more detail:os...
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Oct 24, 2021
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Technique[技术]
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71.8m
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objective
0
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524
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answer
objective c - Unicode characters don't display properly in NSLog output
I want to program my own Eng-Rus dictionary with personalised entries. Studying the topic I wrote this ... " = dog; } See Question&Answers more detail:os...
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Oct 24, 2021
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Technique[技术]
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objective
0
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446
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objective c - Finder update/refresh applescript not working in 10.8
I have been using apple script for updating display for files and folders in finder. This is simplified version of ... some way to update it. See Question&Answers more detail:os...
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Oct 24, 2021
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Technique[技术]
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71.8m
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objective
0
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509
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answer
objective c - How to implement didSelectViewController
I want to catch the event when someone switches between tabs. I have the following two function in my ... didSelectViewController doesn't fire. See Question&Answers more detail:os...
asked
Oct 24, 2021
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Technique[技术]
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71.8m
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objective
0
votes
467
views
1
answer
objective c - Setting property value of parent viewcontroller class from child viewcontroller?
Does anyone know how to update a property value from the subview (child) view controller? I have a int property ... Anyone know how to do this? See Question&Answers more detail:os...
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Oct 24, 2021
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Technique[技术]
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71.8m
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objective
0
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470
views
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answer
objective c - Detect when a Mac OS X window is resized or moved
I am writing an application which must know when any window is resized or moved. I have looked at notifications but ... how I can achieve this? See Question&Answers more detail:os...
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Oct 24, 2021
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Technique[技术]
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71.8m
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objective
0
votes
418
views
1
answer
objective c - How to use ffmpeg on iOS?
I have to use the following command for ffmpeg ffmpeg -i "Video.mp4" -map 0:1 "AudioWithVocalfromStreamOne.mp3" ... using ffprobe at their end. See Question&Answers more detail:os...
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Oct 24, 2021
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Technique[技术]
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深蓝
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71.8m
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objective
0
votes
582
views
1
answer
objective c - How to Save NSMutableArray into plist in iphone
I am new in iphone, i want to save NSMutableArray data into plist file my Code is: NSArray *array = ... forKey:@"artistDetailsDict"]; } See Question&Answers more detail:os...
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Oct 24, 2021
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Technique[技术]
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objective
0
votes
548
views
1
answer
objective c - Creating a fully customized NSAlert
Is it possible to create a fully customized alert? I'm doing it with custom sheets now, but I'd like to have ... and the text color, of course. See Question&Answers more detail:os...
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Oct 24, 2021
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Technique[技术]
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71.8m
points)
objective
0
votes
501
views
1
answer
objective c - Key-Value Observing an NSMutableSet
In a plain class I have a NSMutableSet property. Whenever objects are added to or removed from the set, I ... workaround would then look like? See Question&Answers more detail:os...
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Oct 24, 2021
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Technique[技术]
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深蓝
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71.8m
points)
objective
0
votes
435
views
1
answer
objective c - How to check validity of CLLocation in iOS
How to check validity of CLLocation in iOS? In fact this is my situation, I just create a new map mapView ... -180.00000000' Thanks in advance~ See Question&Answers more detail:os...
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Oct 24, 2021
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Technique[技术]
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深蓝
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71.8m
points)
objective
0
votes
499
views
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answer
objective c - iPhone Disabling UIActionSheet buttons
I want to disable buttons in the UIAction sheet and enable them after a certain condition is true. How do I achieve this? Any ideas? See Question&Answers more detail:os...
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Oct 24, 2021
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Technique[技术]
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深蓝
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71.8m
points)
objective
0
votes
347
views
1
answer
objective c - Obtain details of categories on a class at runtime?
In Objective-C, is there a way to list the categories on a particular class at runtime? With the Objective-C ... . Is there a supported way? See Question&Answers more detail:os...
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Oct 24, 2021
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Technique[技术]
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深蓝
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71.8m
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objective
0
votes
337
views
1
answer
objective c - Using dispatch_once_t per object and not per class
There are multiple sources calling a particular method, but I would like to ensure that it is called exactly once (per ... / do some work once } See Question&Answers more detail:os...
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Oct 24, 2021
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Technique[技术]
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71.8m
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objective
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433
views
1
answer
objective c - iOS App crashing before entering main() with Xcode 4.2 & iOS 5
Background After upgrading xcode4.1/ios4 to xcode4.2/ios5 I am experiencing crashes while the App is loading ... Delete the Derived Data folder See Question&Answers more detail:os...
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Oct 24, 2021
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71.8m
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objective
0
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515
views
1
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objective c - Does NSArray copy objects?
When I make an NSArray using +[NSArray arrayWithObjects:], does it copy those objects? If I release the objects ... will I run into problems? See Question&Answers more detail:os...
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Oct 24, 2021
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71.8m
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