ios - 如何从 URL 获取图像并放入 NSArray？

Question

我想从 URL 获取图像并将其放入 NSArray，但在下面的代码中不起作用，请帮助:

@interface DataViewController ()

@property (readonly, strong, nonatomic) NSArray *picData;

@end

@implementation DataViewController

- (void)viewDidLoad {

    NSString *imageUrlStringAA=@"http://aaa.net/AA.png";
    NSString *imageUrlStringBB=@"http://aaa.net/BB.png";

    NSURL *urlAA=[NSURL URLWithString:imageUrlStringAA];
    NSURL *urlBB=[NSURL URLWithString:imageUrlStringBB];

    NSData *dataAA=[[NSData alloc] initWithContentsOfURL:urlAA];
    NSData *dataBB=[[NSData alloc] initWithContentsOfURL:urlBB];

    UIImage *imageAA=[UIImage imageWithData:dataAA];
    UIImage *imageBB=[UIImage imageWithData:dataBB];

    _picData = [NSArray arrayWithObjects:imageAA, imageBB, nil];

感谢任何想法，谢谢。

Answer 1

首先从 http 协议(protocol)下载任何东西，然后在 info.plist 中添加以下语句

现在试试这段代码:

@interface DataViewController ()

@property (readonly, strong, nonatomic) NSArray *picData;

@end

@implementation DataViewController

- (void)viewDidLoad {
   NSString *imageUrlStringAA=@"http://www.hdwallpapers.in/download/antelope_canyon-360x640.jpg";
   NSString *imageUrlStringBB=@"http://www.hdwallpapers.in/download/vegeta_dragon_ball_super-360x640.jpg";

   NSURL *urlAA=[NSURL URLWithString:imageUrlStringAA];
   NSURL *urlBB=[NSURL URLWithString:imageUrlStringBB];

    NSData *dataAA=[[NSData alloc] initWithContentsOfURL:urlAA];
    NSData *dataBB=[[NSData alloc] initWithContentsOfURL:urlBB];

    UIImage *imageAA=[UIImage imageWithData:dataAA];
    UIImage *imageBB=[UIImage imageWithData:dataBB];
    _picData = [NSArray arrayWithObjects:imageAA, imageBB, nil];
}