ios - 使用 iCarousel 不显示图片

Question

我在情节提要中使用 MultiCarousel，但出现错误，无法在轮播中显示图像。代码有问题吗？？我从 viewfromItemAtIndex 收到错误，说
预期的方法体
预期'：'
预期的标识符或（
预期的标识符或（
无关的右大括号（“}”）
如果你想，请随时询问更多代码查看特定部分。

#import "iCarouselExampleViewController.h"


@interface iCarouselExampleViewController ()

@property (nonatomic, retain) NSMutableArray *items1;
@property (nonatomic, retain) NSMutableArray *items2;

@end


@implementation iCarouselExampleViewController

@synthesize carousel1;
@synthesize carousel2;
@synthesize items1;
@synthesize items2;
- (void)awakeFromNib
{
    //set up data sources
    self.items1 = [NSMutableArray array];
    for (int i = 0; i < 100; i++)
    {
        [items1 addObject:[NSNumber numberWithInt:i]];
    }

    self.items2 = [NSMutableArray array];
    for (int i = 65; i < 65 + 58; i++)
    {
        [items2 addObject:[NSString stringWithFormat:@"%c", i]];
    }
}

- (void)dealloc
{
    //it's a good idea to set these to nil here to avoid
    //sending messages to a deallocated viewcontroller
    carousel1.delegate = self;
    carousel1.dataSource = self;
    carousel2.delegate = self;
    carousel2.dataSource = self;


}

#pragma mark -
#pragma mark View lifecycle

-(void)viewDidLoad
{
    [super viewDidLoad];

    NSArray *paths = NSSearchPathForDirectoriesInDomains(NSDocumentDirectory, NSUserDomainMask, YES);
    NSString *documentsDirectory = [paths objectAtIndex:0];
    NSFileManager *fileManager  = [NSFileManager defaultManager];

    //configure carousel1
    NSString *fPath = [documentsDirectory stringByAppendingPathComponent:@"Tops"];
    NSArray *directoryContent = [fileManager directoryContentsAtPath: fPath];
    imageArray1 = [directoryContent mutableCopy];

    //configure carousel2
    fPath = [documentsDirectory stringByAppendingPathComponent:@"Bottoms"];
    directoryContent = [fileManager directoryContentsAtPath:fPath];
    imageArray2 = [directoryContent mutableCopy];

    carousel1.type = iCarouselTypeLinear;
    carousel2.type = iCarouselTypeLinear;
}

- (void)viewDidUnload
{
    [super viewDidUnload];

    //free up memory by releasing subviews
    self.carousel1 = nil;
    self.carousel2 = nil;
}

#pragma mark -
#pragma mark iCarousel methods

- (NSUInteger)numberOfItemsInCarousel:(iCarousel *)carousel
{
    //return the total number of items in the carousel
    if (carousel == carousel1)
    {
        return [imageArray1 count];
    }
    else
    {
        return [imageArray2 count];
    }
}

- (UIView *)carousel:(iCarousel *)carousel viewForItemAtIndex:(NSUInteger)index reusingView:(UIView *)view

if (view == nil)
{
    view = [[UIImageView alloc] initWithFrame:CGRectMake(0, 0, 200.0f, 200.0f)];

    UIImage *image;
    if (carousel == carousel1)
    {
        image  = [UIImage imageWithContentsOfFile:[imageArray1 objectAtIndex:index]];
        ((UIImageView *)view).image = image;
    }
    else
    {
        image  = [UIImage imageWithContentsOfFile:[imageArray2 objectAtIndex:index]];
        ((UIImageView *)view).image = image;
    }
    return view;
}
else {
    UIImage *image;
    if (carousel == carousel1)
    {
        image  = [UIImage imageWithContentsOfFile:[imageArray1 objectAtIndex:index]];
        ((UIImageView *)view).image = image;
    }
    else
    {
        image  = [UIImage imageWithContentsOfFile:[imageArray2 objectAtIndex:index]];
        ((UIImageView *)view).image = image;
    }
}


return view;
}

Answer 1

你真的很亲近。您在方法开始时缺少第一个大括号。将来，Xcode 会为您指出至少靠近错误的位置，您可以将其用作分析代码的起点。始终确保计算和平衡打开和关闭大括号、括号和括号。

- (UIView *)carousel:(iCarousel *)carousel viewForItemAtIndex:(NSUInteger)index reusingView:(UIView *)view
{ // <--- This brace was missing!!
    if (view == nil)
    {
        view = [[UIImageView alloc] initWithFrame:CGRectMake(0, 0, 200.0f, 200.0f)];

        UIImage *image;
        if (carousel == carousel1)
        {
            image  = [UIImage imageWithContentsOfFile:[imageArray1 objectAtIndex:index]];
            ((UIImageView *)view).image = image;
        }
        else
        {
            image  = [UIImage imageWithContentsOfFile:[imageArray2 objectAtIndex:index]];
            ((UIImageView *)view).image = image;
        }
        return view;
    }
    else {
        UIImage *image;
        if (carousel == carousel1)
        {
            image  = [UIImage imageWithContentsOfFile:[imageArray1 objectAtIndex:index]];
            ((UIImageView *)view).image = image;
        }
        else
        {
            image  = [UIImage imageWithContentsOfFile:[imageArray2 objectAtIndex:index]];
            ((UIImageView *)view).image = image;
        }
    }
    return view;
}