一个轻量级的通过Block执行通知回调的对象KVO扩展，整个库一共200行代码。
To run the example project, clone the repo, and run pod install from the Example directory first.
- Normally KVO:
@interface Observer:NSObject
@end
@implementation Observer
-(void)observeValueForKeyPath:(NSString *)keyPath ofObject:(id)object change:(NSDictionary<NSKeyValueChangeKey,id> *)change context:(void *)context
{
if ([keyPath isEqualToString:@"frame"]){
NSLog(@"the frame=%@", change[NSKeyValueChangeNewKey]);
}
}
@end
UIView *view = [UIView new];
Observer *observer = [Observer new];
[view addObserver:observer forKeyPath:@"frame" options:NSKeyValueObservingOptionNew context:NULL];
view.frame = CGRectZero;
- YSObserver
UIView *view = [UIView new];
[view ys_addObserver:anyObject forKeyPath:@"frame" withBlock:^(id newVal, id OldVal){
NSLog(@"the frame=%@", newVal);
}];
YSObserver is available through CocoaPods. To install it, simply add the following line to your Podfile:
pod 'YSObserver'youngsoft, [email protected]
YSObserver is available under the MIT license. See the LICENSE file for more info.
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