- (void)addImageWithCornerRadius:(CGFloat)radius color:(UIColor *)color;
- (void)addImageWithCornerRadius:(CGFloat)radius color:(UIColor *)color size:(CGSize)size;
@implementation UIColor(Components)
- (NSString *)colorComponent {
CGColorRef cgColor = self.CGColor;
const CGFloat *colorComponents = CGColorGetComponents(cgColor);
CGFloat r = colorComponents[0];
CGFloat g = colorComponents[1];
CGFloat b = colorComponents[2];
NSString *result = [NSString stringWithFormat:@"r%f_g%f_b%f", r, g, b];
return result;
}
@end
@implementation UIView(CornerRadius)
- (void)addImageWithCornerRadius:(CGFloat)radius color:(UIColor *)color {
__weak __typeof(self) weakSelf = self;
dispatch_async(dispatch_get_main_queue(), ^{
[weakSelf addImageWithCornerRadius:radius color:color size:weakSelf.bounds.size];
});
}
- (void)addImageWithCornerRadius:(CGFloat)radius color:(UIColor *)color size:(CGSize)size {
// 根据颜色，圆角程度，尺寸 命名文件
NSString *name = [NSString stringWithFormat:@"%@_%f_%@.png", [color colorComponent], radius, NSStringFromCGSize(size)];
NSString *fullPath = [[self pathWithFolder:@"CornerRadius"] stringByAppendingPathComponent:name];
// 判断本地是否已经有缓存了
NSFileManager *fileManager = [NSFileManager defaultManager];
BOOL isExists = [fileManager fileExistsAtPath:fullPath];
UIImage *image;
if (isExists) {
// 从缓存中获取
image = [UIImage imageNamed:fullPath];
} else {
// 缓存中没有 -> 生成图片 -> 保存
image = [self getImageWithSize:size color:color radius:radius];
NSData *data = UIImagePNGRepresentation(image);
[data writeToFile:fullPath atomically:YES];
}
// 讲生成的图片覆盖到当前的图层上
UIImageView *imageView = [[UIImageView alloc] initWithImage:image];
imageView.frame = CGRectMake(0, 0, size.width, size.height);
[self addSubview:imageView];
}
- (UIImage *)getImageWithSize:(CGSize)size color:(UIColor *)color radius:(CGFloat)radius {
UIGraphicsBeginImageContextWithOptions(size, NO, 0.0);
UIBezierPath *aPath = [UIBezierPath bezierPathWithRect:CGRectMake(0,0,size.width,size.height)];
UIBezierPath *bPath = [UIBezierPath bezierPathWithRoundedRect:aPath.bounds cornerRadius:radius];
[aPath appendPath:[bPath bezierPathByReversingPath]];
[color setFill];
[aPath fill];
UIImage *image = UIGraphicsGetImageFromCurrentImageContext();
UIGraphicsEndImageContext();
return image;
}
- (NSString *)pathWithFolder:(NSString *)folder {
NSString *documentPath = [self documentPath];
NSFileManager *fileManager = [NSFileManager defaultManager];
NSString *folderPath = [documentPath stringByAppendingPathComponent:folder];
BOOL isExist = [fileManager fileExistsAtPath:folderPath];
if (!isExist) {
[fileManager createDirectoryAtPath:folderPath
withIntermediateDirectories:YES
attributes:nil
error:nil];
}
return folderPath;
}
- (NSString *)documentPath {
NSArray *paths = NSSearchPathForDirectoriesInDomains(NSDocumentDirectory,NSUserDomainMask, YES);
NSString *path = [paths objectAtIndex:0];
return path;
}