Question

我想通过计时器更改我的自定义UIImageView子类的图片。但它不起作用。你能救我吗？

这是我的代码：

-(id)initWithCoder:(NSCoder *)aDecoder {

    self = [super initWithCoder:aDecoder];
    if (self) {
        [self update];
    }
    return self;
}

-(void)update {

    self.image = [UIImage imageNamed:@"Green.png"];
    [NSTimer scheduledTimerWithTimeInterval:5 target:self selector:@selector(change) userInfo:nil repeats:YES];

}

-(void)change {

    self.image = [UIImage imageNamed:@"Red.png"];

}

谢谢！

Answer 1

使用image属性也可以将任何图像分配给imageView小整改，请参见下面的代码。

另外，不要将变量名称与其类属性相同。

-(void)update {

    self.image.image = [UIImage imageNamed:@"Green.png"];
    [NSTimer scheduledTimerWithTimeInterval:5 target:self selector:@selector(change) userInfo:nil repeats:YES];

}

-(void)change {
    self.image.image = [UIImage imageNamed:@"Red.png"];
}

self.image。图片 peoperty在这里添加

编辑：

将您的媒体资源从UIImage更改为UIImageView，如下所示

@property (strong, nonatomic) IBOutlet UIImageView *image;

.h头文件

#import <UIKit/UIKit.h>

@interface orientation : UIViewController
@property (strong, nonatomic) IBOutlet UIImageView *image;
@end

.m消息文件

#import "orientation.h"

@interface orientation ()

@end

@implementation orientation

- (void)viewDidLoad {
    [super viewDidLoad];

    [self update];
    // Do any additional setup after loading the view.
}

-(void)update {

    self.image.image = [UIImage imageNamed:@"investment1.png"];
    [NSTimer scheduledTimerWithTimeInterval:5 target:self selector:@selector(change) userInfo:nil repeats:YES];

}

-(void)change {
    self.image.image = [UIImage imageNamed:@"logout.png"];
}

- (void)didReceiveMemoryWarning {
    [super didReceiveMemoryWarning];
    // Dispose of any resources that can be recreated.
}
@end

在UIImageView子类中使用计时器

1 个答案: