ios - 使用 UIDocumentInteractionController 时点击 "Open in Instagram"时发生崩溃

Question

我有以下类(class):

.h 文件:

#import <Foundation/Foundation.h>

@interface CHTInstagramSharer : NSObject<UIDocumentInteractionControllerDelegate>
@property (nonatomic, retain) UIDocumentInteractionController *dic;
-(void) sharePic:(UIImage *)image;
@end

.m文件

#import "CHTInstagramSharer.h"
#import <UIKit/UIKit.h>
#import "BaseController.h"

@implementation CHTInstagramSharer


-(void) sharePic:(UIImage *)image{    

    NSString * jpgPath = [Utils saveImage:image toFile:@"cover.igo"];
    NSURL *url = [NSURL fileURLWithPath:jpgPath];
    self.dic = [UIDocumentInteractionController interactionControllerWithURL: url];
    self.dic.UTI = @"com.instagram.exclusivegram";
    self.dic.delegate = self;
    self.dic.annotation = [NSDictionary dictionaryWithObject:@"Caption Test" forKey:@"InstagramCaption"];
    [self.dic presentOpenInMenuFromRect:CGRectMake(0, 0, 320, 44)    inView:[BaseController sharedInstance].view animated: YES ];
}
@end

它向 Controller 显示“在 Instagram 中打开”选项，但当我点击它时，应用程序崩溃了。

知道为什么吗？

补充信息，当我在调试器中查看 url 时，我得到: file://localhost/var/mobile/Applications/53435781-3BAB-4B02-A80C-FC088F696AE8/Library/Caches/cover.igo

当我查看堆栈跟踪时，崩溃似乎发生在 [_UIOpenWithAppActivity performActivity] 中。

Answer 1

看起来您没有保留文档 Controller 。我这样使用 Instagram Hook :

编辑:为 ARC 修改

- (void)sharePic:(UIImage *)image {

    NSString *documentsDirectory = [NSHomeDirectory() stringByAppendingPathComponent:@"Documents"];
    NSString *savedImagePath = [documentsDirectory stringByAppendingPathComponent:@"Image.ig"];
    NSData *imageData = UIImageJPEGRepresentation(image, 0.8);
    [imageData writeToFile:savedImagePath atomically:YES];
    NSURL *imageUrl = [NSURL fileURLWithPath:savedImagePath];

    UIDocumentInteractionController *docController = [UIDocumentInteractionController interactionControllerWithURL:imageUrl];
    [docController retain];
    docController.UTI = @"com.instagram.exclusivegram";
    docController.delegate = self;
    docController.annotation = [NSDictionary dictionaryWithObject:@"Caption Test" forKey:@"InstagramCaption"];
    [docController presentOpenInMenuFromRect:CGRectZero inView:self.view animated:YES];
    docController = nil;
}

如果这有帮助，请告诉我。