我有一个应用程序,用户可以从内置的应用程序图像或从iPhone照片库中选择图像.我使用一个具有NSString保存属性的对象Occasion imagePath.
现在,在内置应用程序映像的情况下,我确实将文件名作为NSString一个保存[occasion imagePath].但是在用户从照片库中选择图像的第二种情况下,我得到了一个NSURL我想要转换为NSString能够将其保存在其中的图像[occasion imagePath.
是否有可能将其转换NSURL为NSString?
我一直在网上寻找很多片段,我仍然无法找到问题的答案.我的问题是我有一个scrollView(SV),我想以编程方式在scrollView(SV)中添加一个按钮,其superview的相同宽度和高度是scrollView(SV),这样当用户旋转设备按钮时将具有相同的框架scrollView(SV).如何做NSLayout/NSLayoutConstraint?谢谢
我想在CoreData中为托管对象存储枚举状态
enum ObjStatus: Int16 {
case State1 = 0
case State2 = 1
case State3 = 3
}
class StateFullManagedObject: NSManagedObject {
@NSManaged var state: Int16
}
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最后一步是将StateFullManagedObject的状态变量转换为ObjStatus以进行直接比较,这对我不起作用.例如,我不能在Int16和Int16枚举之间使用==运算符.我得到的编译时错误是
Int16无法转换为'MirrorDisposition'
.见下面的条件:
var obj: StateFullManagedObject = // get the object
if (obj.state == ObjStatus.State1) { // Int16 is not convertible to 'MirrorDisposition'
}
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如何在Int16和枚举之间进行比较/分配?
这是我的代码:
_mediaPlayer = [[MPMoviePlayerController alloc] init];
_mediaPlayer.controlStyle = MPMovieControlStyleNone;
_mediaPlayer.shouldAutoplay = NO;
[_mediaPlayer.view setFrame: CGRectMake(5, 5, 600,400)];
[playerHolder addSubview: _mediaPlayer.view];
//
[self prepareScreenContentToPlay];
//
UITapGestureRecognizer *singleFingerTap = [[UITapGestureRecognizer alloc] initWithTarget:self action:@selector(handleRollTap:)];
singleFingerTap.numberOfTapsRequired = 1;
[_mediaPlayer.view addGestureRecognizer:singleFingerTap];
[singleFingerTap release];
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和手势识别器的动作方法:
-(void)handleRollTap:(UITapGestureRecognizer*)sender{
NSLog(@"%@", @"touch");
}
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MPMoviePlayerController工作正常.另外我想处理MPMoviePlayerController视图上的触摸但handleRollTap从未调用过.为什么MPMoviePlayerController的视图不适用于UITapGestureRecognizer?
好.如果singleFingerTap.numberOfTapsRequired = 2;那时一切正常.但没有什么可以单击...
我有一个UIControl实现了触摸开始方法,如下所示:
- (void)touchesBegan:(NSSet *)touches withEvent:(UIEvent *)event
{
[super touchesBegan:touches withEvent:event];
//More code goes here
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UIControl的这个子类在视图控制器中实例化,然后作为子视图添加到该视图控制器.我在UIControl的touches begin方法中有一个断点,并且该方法永远不会被调用.我一直在做一些阅读,看起来View Controller有一些逻辑决定是否将触摸事件传递给它的子视图.奇怪的是,我在同一个视图控制器中有一个不同的UIControl子类,触摸事件在用户触摸时传递给它!这是完整的代码:
.H
#import <UIKit/UIKit.h>
@interface CustomSegment : UIView
@property (nonatomic, strong) UIImageView *bgImageView;
@property (nonatomic, assign) NSInteger segments;
@property (nonatomic, strong) NSArray *touchDownImages;
@property (nonatomic, readonly, assign) NSInteger selectedIndex;
@property (nonatomic, weak) id delegate;
- (id)initWithPoint:(CGPoint)point numberOfSegments:(NSInteger)_segments andTouchDownImages:(NSArray *)_touchDownImages;
- (void)touchesBegan:(NSSet *)touches withEvent:(UIEvent *)event;
@end
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.M
#import "CustomSegment.h"
@implementation CustomSegment
@synthesize bgImageView, segments, touchDownImages, selectedIndex, delegate;
- (id)initWithPoint:(CGPoint)point
numberOfSegments:(NSInteger)_segments
andTouchDownImages:(NSArray *)_touchDownImages
{
self = …Run Code Online (Sandbox Code Playgroud) 我有一个touchesEnded事件,用于检查何时按下UITextField.我想要它做的是隐藏/显示UIPickerView.如何才能做到这一点?
- (void)touchesEnded:(NSSet *)touches withEvent:(UIEvent *)event{
UITouch *touch = [[event allTouches] anyObject];
if (CGRectContainsPoint([self.textField frame], [touch locationInView:self.view]))
{
NSString * error = @"Touched the TextField";
UIAlertView * errorAlert = [[UIAlertView alloc] initWithTitle:@"Selection!" message:error delegate:self cancelButtonTitle:@"OK" otherButtonTitles:nil];
[errorAlert show];
//Want to show or hide UIPickerView
}
}
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触摸发生时我已经分配了UIPickerView
@interface ThirdViewController : UIViewController <UITextFieldDelegate,UIPickerViewDelegate> {
IBOutlet UIPickerView *pickerView;
}
Run Code Online (Sandbox Code Playgroud) 是否有现成的进度条uicontrol可以添加到Matlab gui,uicontrol或ActiveX组件?
[edit]我知道waitbar函数,我的意思是一个可以在设计的GUI中实现的组件,而不仅仅是弹出窗口.状态栏中的电池状态.
我有以下标记:
<div class="options">
<div class="quantity">
<label>Qty:</label>
<input type="text" name="quantity" value="1"/>
</div>
<div class="buttons">
<a href="#" class="add">Add Item</a>
</div>
</div>
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我有一个使用jQuery绑定到'add'类的click事件.当我点击它时,我想得到name ="quantity"的值,但是有几个地方点击了'add'和几个数量字段.
我正试图获得'最接近'的输入值.我尝试过使用'最近'和'findall',但没有运气.
知道如何使用jQuery获得这个吗?谢谢!
我正在使用UICollectionView但未找到以下方法:
func collectionView(collectionView: UICollectionView, layout collectionViewLayout: UICollectionViewLayout, sizeForItemAtIndexPath indexPath: NSIndexPath) -> CGSize
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请建议我替换它.
我正在使用此方法加密视频文件:
public static void encryptToBinaryFile(String password, byte[] bytes, File file) throws EncrypterException {
try {
final byte[] rawKey = getRawKey(password.getBytes());
final FileOutputStream ostream = new FileOutputStream(file, false);
ostream.write(encrypt(rawKey, bytes));
ostream.flush();
ostream.close();
} catch (IOException e) {
throw new EncrypterException(e);
}
}
private static byte[] encrypt(byte[] raw, byte[] clear) throws EncrypterException {
try {
final SecretKeySpec skeySpec = new SecretKeySpec(raw, "AES");
final Cipher cipher = Cipher.getInstance("AES");
cipher.init(Cipher.ENCRYPT_MODE, skeySpec);
return cipher.doFinal(clear);
} catch (Exception e) {
throw new EncrypterException(e);
}
}
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但它给出了一个错误Outofmemoryerror说拒绝分配301023321元素. …
ios ×4
swift ×4
iphone ×2
android ×1
autolayout ×1
core-data ×1
dynamic ×1
encryption ×1
file ×1
ipad ×1
java ×1
javascript ×1
jquery ×1
matlab ×1
nsstring ×1
nsurl ×1
objective-c ×1
swift3 ×1
swift4 ×1
uicomponents ×1
uicontrol ×1
uipickerview ×1
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