相关疑难解决方法(0)

为html标签使用大写字母是不是很糟糕？

什么是最佳做法？

 <HTML> or <html>

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为什么我们应该坚持一个特定的案例？

但是,所有浏览器似乎都会解释这两种情况并返回预期的输出.

html lowercase uppercase

pow*_*own

lucky-day

42
推荐指数

4
解决办法

3万
查看次数

在iOS10上生成的GIF图像不再在浏览器上永久循环

这是一个生成GIF图像的ObjectiveC方法:

@implementation NSArray (GIFImage)

- (NSString*)GIFImageWithImageDuration:(CGFloat)GIFImageDuration
{
    NSArray *images = self;

    NSString *path = [[NSSearchPathForDirectoriesInDomains(NSDocumentDirectory, NSUserDomainMask, YES) lastObject] stringByAppendingPathComponent:@"animated.gif"];
    CGImageDestinationRef destination = CGImageDestinationCreateWithURL((CFURLRef)[NSURL fileURLWithPath:path],
                                                                        kUTTypeGIF,
                                                                        images.count,
                                                                        NULL);

    NSDictionary *frameProperties = [NSDictionary dictionaryWithObject:[NSDictionary dictionaryWithObject:[NSNumber numberWithFloat:GIFImageDuration]
                                                                                                   forKey:(NSString *)kCGImagePropertyGIFDelayTime]
                                                                forKey:(NSString *)kCGImagePropertyGIFDictionary];


    NSDictionary *gifProperties = [NSDictionary dictionaryWithObject:[NSDictionary dictionaryWithObject:[NSNumber numberWithInt:0] forKey:(NSString *)kCGImagePropertyGIFLoopCount]
                                                              forKey:(NSString *)kCGImagePropertyGIFDictionary];

    for ( NSInteger index = 0; index < images.count; index++ )
    {
        UIImage *image = (UIImage *)[images objectAtIndex:index];
        CGImageDestinationAddImage(destination, image.CGImage, (CFDictionaryRef)frameProperties);
    }

    CGImageDestinationSetProperties(destination, (CFDictionaryRef)gifProperties);
    CGImageDestinationFinalize(destination);
    CFRelease(destination);
    NSLog(@"animated GIF file created at …

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objective-c gif animated-gif ios10

mkt*_*kto

2017 05-23

5
推荐指数

1
解决办法

442
查看次数