ios - 无法以编程方式将文件从包加载到 UITextView 和 UIImageView

Question

我一直在尝试将主包中的图像和文本文件加载到 UITextView 和 UIImageView 框中。我已经从 .xib 文件正确连接了 socket ，并确保我尝试加载的文件存在于 bundle 中，但它们没有加载，当我通过 NSLog 测试它们时，它们返回为 null。下面复制的是 .h 和 .m 文件中的代码。如果您想知道，有些 channel 很强大，因为我一直在尝试弄乱设置以使其正常工作，但到目前为止无济于事。

“.h文件”

@interface CluesViewController : UIViewController

@property (strong, nonatomic) IBOutlet UIImageView *cluesBackground;
@property (weak, nonatomic) IBOutlet UIImageView *titleImage;
@property (weak, nonatomic) IBOutlet UIImageView *typeATitle;
@property (weak, nonatomic) IBOutlet UIImageView *typeBTitle;
@property (weak, nonatomic) IBOutlet UIImageView *divider;
@property (weak, nonatomic) IBOutlet UITextView *typeAText;
@property (strong, nonatomic) IBOutlet UITextView *typeBText;

-(void)updateCluesViewInfoTypeA:(NSString *)typeA updateCluesViewInfoTypeB:(NSString *)typeB;

@end

“.m文件”

-(void)updateCluesViewInfoTypeA:(NSString *)typeA updateCluesViewInfoTypeB:(NSString *)typeB {

    NSString *bGImageString = NULL;
    bGImageString = [NSString stringWithFormat:@"%@&%@-bg", typeA, typeB];
    NSString *bGPath = [[NSBundle mainBundle] pathForResource:bGImageString ofType:@"png"];
    UIImage *bGImage = [UIImage imageNamed:bGPath];
    [_cluesBackground setImage:bGImage];

    NSString *titleImageString = NULL;
    titleImageString = [NSString stringWithFormat:@"%@&%@-clues", typeA, typeB];
    NSString *titleImagePath = [[NSBundle mainBundle] pathForResource:titleImageString ofType:@"png"];
    UIImage *titleImage = [UIImage imageNamed:titleImagePath];
    [_titleImage setImage:titleImage];

    NSString *typeATitleImageString = NULL;
    typeATitleImageString = [NSString stringWithFormat:@"%@-text", typeA];
    NSString *typeATitlePath = [[NSBundle mainBundle] pathForResource:typeATitleImageString ofType:@"png"];
    UIImage *typeATitleImage = [UIImage imageNamed:typeATitlePath];
    [_typeATitle setImage:typeATitleImage];

    NSString *typeBTitleImageString = NULL;
    typeBTitleImageString = [NSString stringWithFormat:@"%@-text", typeB];
    NSString *typeBTitlePath = [[NSBundle mainBundle] pathForResource:typeBTitleImageString ofType:@"png"];
    UIImage *typeBTitleImage = [UIImage imageNamed:typeBTitlePath];
    [_typeBTitle setImage:typeBTitleImage];

    NSString *dividerImageString = NULL;
    dividerImageString = [NSString stringWithFormat:@"%@&%@-divider", typeA, typeB];
    NSString *dividerImagePath = [[NSBundle mainBundle] pathForResource:dividerImageString ofType:@"png"];
    UIImage *dividerImage = [UIImage imageNamed:dividerImagePath];
    [_divider setImage:dividerImage];

    NSString *typeATextString = NULL;
    typeATextString = [NSString stringWithFormat:@"%@Clues", typeA];
    NSString *typeATextPath = [[NSBundle mainBundle] pathForResource:typeATextString ofType:@"txt"];
    NSString* typeATextContent = [NSString stringWithContentsOfFile:typeATextPath encoding:NSASCIIStringEncoding error:NULL];
    self.typeAText.text = typeATextContent;

    NSString *typeBTextString = NULL;
    typeBTextString = [NSString stringWithFormat:@"%@Clues", typeB];
    NSString *typeBTextPath = [[NSBundle mainBundle] pathForResource:typeBTextString ofType:@"txt"];
    NSString* typeBTextContent = [NSString stringWithContentsOfFile:typeBTextPath encoding:NSASCIIStringEncoding error:NULL];
    self.typeBText.text = typeBTextContent;

    NSLog(@"The textfield is %@", self.typeBText.text);
}

Answer 1

您使用的imageNamed:不正确。您应该只传递图像名称:

NSString *bGImageString = [NSString stringWithFormat:@"%@&%@-bg", typeA, typeB];
UIImage *bGImage = [UIImage imageNamed:bGImageString];

对其他图像也进行此更改。您只想将图像的完整路径与 UIImage imageWithContentsOfFile: 一起使用，而不是 imageNamed:。

对于文件，您确定文件编码是 ASCII 而不是 UTF-8 吗？

如果编码不是问题，则使用 error 参数查看问题所在。

NSString *typeATextString = [NSString stringWithFormat:@"%@Clues", typeA];
NSString *typeATextPath = [[NSBundle mainBundle] pathForResource:typeATextString ofType:@"txt"];
NSError *error = nil;
NSString* typeATextContent = [NSString stringWithContentsOfFile:typeATextPath encoding:NSASCIIStringEncoding error:&error];
if (typeATextContent) {
    self.typeAText.text = typeATextContent;
} else {
    NSLog(@"Unable to load text from %@: %@", typeATextPath, error);
}