Question

我正在尝试使用单例保存按钮的名称，以便可以在另一个视图中访问该名称以播放具有相同名称的视频。但是，我收到错误：SIGABRT。我真的没有看到我的代码有什么问题。有任何想法吗？

#import "List.h"
#import "MyManager.h"
#import "Video.h"

@implementation ExerciseList

-(IBAction) goToVideo:(UIButton *) sender{
    MyManager *sharedManager = [MyManager sharedManager];
    sharedManager.vidName = [[sender titleLabel] text];
    Video *videoGo = [[Video alloc] initWithNibName: @"Video" bundle: nil];
    [self.navigationController pushViewController: videoGo animated: YES];
    [videoGo release];
}

这是MyManager的.h和.m：

#import <foundation/Foundation.h>

@interface MyManager : NSObject {
    NSMutableArray *workouts;
    NSString *vidName;
}

@property (nonatomic, retain) NSMutableArray *workouts;
@property (nonatomic, retain) NSString *vidName;

+ (id)sharedManager;

@end

#import "MyManager.h"

static MyManager *sharedMyManager = nil;

@implementation MyManager
@synthesize workouts;
@synthesize vidName;

#pragma mark Singleton Methods
+ (id)sharedManager {
    @synchronized(self) {
        if (sharedMyManager == nil)
            sharedMyManager = [[self alloc] init];
    }
    return sharedMyManager;
}
- (id)init {
    if ((self = [super init])) {
        workouts = [[NSMutableArray alloc] init];
        vidName = [[NSString alloc] init];
    }
    return self;
}

-(void) dealloc{
    self.workouts = nil;
    self.vidName = nil;
    [super dealloc];
}
@end

Answer 1

您应该访问按钮的标题

sharedManger.vidName = [sender currentTitle]; 但是，您不使用ARC，因此请检查您的vidName属性为retain或复制的位置。如果它没有保留或复制，那么你也可以使用这个代码

if(sharedManger.vidname != nil){
    [sharedManger.vidName release]; 
    sharedManger.vidName = nil;

}
sharedManger.vidName = [[sender currentTitle] retain];

保存按钮的标题，以便可以在另一个视图中访问它（Objective-C）

1 个答案: