不确定NSProgressIndicator将不会动画

Question

所以我有一个简单的用户界面,一个开始按钮,一些文本/标签和一个进度条.单击"开始"按钮时,NSProgressIndicator 应设置动画.这是我的代码:

@synthesize progressBar = progressBar;
 /* Some code and setup stuffs... */
- (IBAction)startAction:(id)sender {
    NSLog(@"Button clicked.");
    NSLog(@"Beginning Socketry and socket creation...");
    [progressBar setUsesThreadedAnimation:YES];
    [progressBar setIndeterminate:YES];
    [progressBar startAnimation:progressBar];
}

我检查了多个源(Apple Developer Portal等),但没有任何效果.我不必拥有NSPIndicator,但如果可以的话,它会非常好.另外,这是我的AppDelegate.h文件:

#import <Cocoa/Cocoa.h>

@interface AppDelegate : NSObject <NSApplicationDelegate>

@property (assign) IBOutlet NSWindow *window;

@property (readonly, strong, nonatomic) NSPersistentStoreCoordinator *persistentStoreCoordinator;
@property (readonly, strong, nonatomic) NSManagedObjectModel *managedObjectModel;
@property (readonly, strong, nonatomic) NSManagedObjectContext *managedObjectContext;
@property (weak) IBOutlet NSProgressIndicator *progressBar;
- (IBAction)saveAction:(id)sender;

- (IBAction)startAction:(id)sender;

- (IBAction)changeStatus:(id)sender;

- (IBAction)changeProgress:(id)sender;

@end

Answer 1

转到进度指示器的属性检查器并进行设置,如下图所示:

见下面的代码:

@synthesize progressBar;
- (IBAction)startAction:(id)sender {
    [progressBar setHidden:NO];
    [progressBar setIndeterminate:YES];
    [progressBar setUsesThreadedAnimation:YES];
    [progressBar startAnimation:nil];
}