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swift中指针的使用
func incrementor(ptr: UnsafeMutablePointer<Int>) {
ptr.memory += 1
}
var a = 10
incrementor(&a)
[webView stringByEvaluatingJavaScriptFromString:@"var script = document.createElement(‘script‘);"
"script.type = ‘text/javascript‘;"
"script.text = \"function myFunction() { "
"var field = document.getElementsByName(‘q‘)[0];"
"field.value=‘iCocos‘;"
"document.forms[0].submit();"
"}\";"
"document.getElementsByTagName(‘head‘)[0].appendChild(script);"];
[webView stringByEvaluatingJavaScriptFromString:@"myFunction();"];
@IBDesignable class CustomView : UIView {
@IBInspectable var borderColor: UIColor = UIColor.clearColor()
@IBInspectable var borderWidth: CGFloat = 0
@IBInspectable var cornerRadius: CGFloat = 0
}
1 extension UIView {
2
3
4 func findController() -> UIViewController! {
5 return self.findControllerWithClass(UIViewController.self)
6 }
7
8 func findNavigator() -> UINavigationController! {
9 return self.findControllerWithClass(UINavigationController.self)
10 }
11
12 func findControllerWithClass<T>(clzz: AnyClass) -> T? {
13 var responder = self.nextResponder()
14 while(responder != nil) {
15 if (responder!.isKindOfClass(clzz)) {
16 return responder as? T
17 }
18 responder = responder?.nextResponder()
19 }
20
21 return nil
22 }
23
24 }
25
26
27 if UI_USER_INTERFACE_IDIOM() == .Pad {
28 // 设备是 iPad
29 }
30
31 if UIInterfaceOrientationIsPortrait(orientation) {
32 // 屏幕是竖屏
33 }
Xcode默认使用https的解决方案
<key>NSAppTransportSecurity</key><dict>
<key>NSAllowsArbitraryLoads</key>
<true/></dict>
IBInspectable在IB的Attribute Inspector（属性检查器）中查看类的属性，而IBDesignable能实时更新视图
1 // 1.获取images文件夹中所有的文件
2 NSString *sourcePath = @"/Users/apple/Desktop/abc";
3 NSString *dest = @"/Users/apple/Desktop/lnj";
4
5 // 2.获取images文件夹中所有的文件
6 NSFileManager *mgr = [NSFileManager defaultManager];
7 NSArray *subPaths = [mgr subpathsAtPath:sourcePath];
8 // NSLog(@"%@", subPaths);
9 // 3.剪切文件到lnj文件夹中
10
11 for (int i = 0; i < subPaths.count; i++) {
12 // 3.1获取当前遍历到得文件的名称
13 NSString *fileNmae = subPaths[i];
14 // 3.2根据当前文件的名称, 拼接全路径
15 NSString *fromPath = [sourcePath stringByAppendingPathComponent:fileNmae];
16 NSString *toPath = [dest stringByAppendingPathComponent:fileNmae];
17 NSLog(@"fromPath = %@", fromPath);
18 NSLog(@"toPath = %@", toPath);
19
20 [mgr moveItemAtPath:fromPath toPath:toPath error:nil];
21 }
22
23 dispatch_apply(subPaths.count, dispatch_get_global_queue(0, 0), ^(size_t index) {
24 // 3.1获取当前遍历到得文件的名称
25 NSString *fileNmae = subPaths[index];
26 // 3.2根据当前文件的名称, 拼接全路径
27 NSString *fromPath = [sourcePath stringByAppendingPathComponent:fileNmae];
28 NSString *toPath = [dest stringByAppendingPathComponent:fileNmae];
29 NSLog(@"fromPath = %@", fromPath);
30 NSLog(@"toPath = %@", toPath);
31
32 [mgr moveItemAtPath:fromPath toPath:toPath error:nil];
33
34 });
35
CLLocationManager *manager = [CLLocationManager new];
if ([manager respondsToSelector:@selector(setAllowsBackgroundLocationUpdates:)]) {
// 在iOS 8中不可用
manager.allowsBackgroundLocationUpdates = YES;
}
if (UIFontTextStyleCallout) {
textLabel.font = [UIFont preferredFontForTextStyle:UIFontTextStyleCallout];
}
不幸的是结果并非如此。原来这个标志在iOS 8中是存在的，只是没有宣布公有。使用一个私有的方法或值有可能出现难以预料的结果，况且这也和我们的想法不同。
if #available(iOS 9.0, *) {
let store = CNContactStore()
} else {
// 旧版本的情况
}
let manager = CLLocationManager()
if #available(iOS 9.0, *) {
manager.allowsBackgroundLocationUpdates = true
}
可用性检查的使用情形
if #available(iOS 9, OSX 10.10, *) {
// 将在iOS 9或OS X 10.10上执行的代码
}
private func somethingNew() {
guard #available(iOS 9, *) else { return }
// 在iOS 9中执行的代码
let store = CNContactStore()
let predicate = CNContact.predicateForContactsMatchingName("Zakroff")
let keys = [CNContactGivenNameKey, CNContactFamilyNameKey]
...
}
@available(iOS 9.0, *)
private func checkContact() {
let store = CNContactStore()
// ...
}
编译时的安全性检查
if #available(iOS 9.0, *) {
label.font = UIFont.preferredFontForTextStyle(UIFontTextStyleCallout)
} else {
label.font = UIFont.preferredFontForTextStyle(UIFontTextStyleBody)
}
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原文地址：http://www.cnblogs.com/stronger-ios-lcx/p/5635742.html
