CIDetector *detector = [CIDetector detectorOfType:CIDetectorTypeFace
context:nil
options:@{CIDetectorAccuracy: CIDetectorAccuracyHigh}];
NSDictionary *options = @{ CIDetectorSmile: @YES, CIDetectorEyeBlink: @YES };
NSArray *features = [detector featuresInImage:image.CIImage options:options];
for (CIFaceFeature *feature in features) {
NSLog(@"Bounds: %@", NSStringFromCGRect(feature.bounds));
if (feature.hasSmile) {
NSLog(@"Nice smile!");
} else {
NSLog(@"Why so serious?");
}
if (feature.leftEyeClosed || feature.rightEyeClosed) {
NSLog(@"Open your eyes!");
}
}
[Format Time: 0.0055 seconds]
二十一、给UITextView增加了链接
现在在iOS添加你自己的Twitter账户更加简单了，现在你可以给一个NSAttributedString增加链接了，然后当它被点击的时候唤起一个定制的action。
首先，创建一个NSAttributedString然后增加给它增加一个NSLinkAttributeName 属性，见以下：
Crayon Syntax Highlighter v2.7.1
NSMutableAttributedString *attributedString = [[NSMutableAttributedString alloc] initWithString:@"This is an example by @marcelofabri_"];
[attributedString addAttribute:NSLinkAttributeName
value:@"username://marcelofabri_"
range:[[attributedString string] rangeOfString:@"@marcelofabri_"]];
NSDictionary *linkAttributes = @{NSForegroundColorAttributeName: [UIColor greenColor],
NSUnderlineColorAttributeName: [UIColor lightGrayColor],
NSUnderlineStyleAttributeName: @(NSUnderlinePatternSolid)};
// assume that textView is a UITextView previously created (either by code or Interface Builder)
textView.linkTextAttributes = linkAttributes; // customizes the appearance of links
textView.attributedText = attributedString;
textView.delegate = self;
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