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缩略语 2. 观望变化
原标题:UIScrollView animation laggy

I m 书写一台显示UIScrollView图像(1024x1322 max)的iPad读机

每一图像在需要时(在滚动中)装在背景线上(总有3幅最大负荷的图像)。

我的问题是:当数据装上Im,更新UIImageView时,我的背景是:

image= [[UIImage alloc] initWithContentsOfFile: file];
[content setImage:image]

这似乎锁定了主线,使情报和安全局的意见交换根本无法顺利进行。

预 例

问题回答

您应never从背景线上树立形象(或该事物的任何不动产)。 notthread-safe>。 你们需要将图像传送到主线上,无论是使用GCD还是performSeleOnMainThread:withObject:wait UntilDone:

在你的背景中,不要使用UIImage,就这样做。

CGDataProviderRef dataProvider = CGDataProviderCreateWithFilename("file.png"); 
CGImageRef image = CGImageCreateWithPNGDataProvider(dataProvider, NULL, NO, kCGRenderingIntentDefault);

然后,将图像回馈到主线,然后用“UIImage 图像WithCGImage:image”制作UIImage。

希望这一帮助





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