gpake

//Why you'd want to do that, I don't know,
//but someone asked me how to turn the window background yellow.
//Since the window has a contentView NSView in it,
//this adds a category on it that draws the background with a transparent yellow.
//You also get the pinstripe effects. Just put this code anywhere.
@implementation NSView (BWYellowView)

- (void) drawRect: (NSRect) rect
{
    NSColor *transparentYellow;

gpake

//get ip form local
string name = dns.getHostName();//the host's name
IPHostEntry me = dns.getHostEntry(name);
foreach(IPAddress ip in me.AddressList) {
	listbox.items.add(ip)
}
IPAddress localip = IPaddress.pares(@"127.0.0.1");
IPEndPoint iep = new IPEndPoint(localip, 80);

gpake

[self.gUserNameTextField setValue:[UIColor redColor]
                       forKeyPath:@"_placeholderLabel.textColor"];

gpake

In your current code, you save the GState of the current context, configure it to draw a shadow .. and the restore it to what it was before you configured it to draw a shadow. Then, finally, you invoke the superclass's implementation of drawRect: .

Any drawing that should be affected by the shadow setting needs to happen after

CGContextSetShadow(currentContext, CGSizeMake(-15, 20), 5);
but before

CGContextRestoreGState(currentContext);
So if you want the superclass's drawRect: to be 'wrapped' in a shadow, then how about if you rearrange your code like this?

gpake

http://stackoverflow.com/questions/15704163/draw-shadow-only-from-3-sides-of-uiview

I know you say setting layer.shadowOffset won't work for you, but you are allowed to put in negative values so setting it layer.shadowOffset = CGSizeMake(0.0, -2.0) would come close to the effect you're looking for but of course I expect you want it to be even on the three sides.

So here we go with layer.shadowPath!

UIView *block1 = [[UIView alloc] initWithFrame:CGRectMake(32.0, 32.0, 128.0, 128.0)];
[block1 setBackgroundColor:[UIColor orangeColor]];
[self.view addSubview:block1];

gpake

(lldb) bt
* thread #1, queue = 'com.apple.main-thread', stop reason = breakpoint 2.9
  * frame #0: 0x0000000124f06a23 eval112.dylib`DetailViewController.injected(self=<unavailable>) at DetailViewController.swift:17
    frame #1: 0x0000000124f06af4 eval112.dylib`@objc DetailViewController.injected() at DetailViewController.swift:0
    frame #2: 0x0000000122b20a34 iOSInjection`partial apply ObjC forwarder with unmangled suffix ".88" + 20
    frame #3: 0x0000000122b1a017 iOSInjection`closure #4 (Swift.AnyObject) -> () in static iOSInjection.SwiftInjection.inject(tmpfile: Swift.String) throws -> () + 727
    frame #4: 0x0000000122b1a1d1 iOSInjection`partial apply forwarder for closure #4 (Swift.AnyObject) -> () in static iOSInjection.SwiftInjection.inject(tmpfile: Swift.String) throws -> () + 17
    frame #5: 0x0000000122b1c731 iOSInjection`iOSInjection.SwiftSweeper.sweepInstance(Swift.AnyObject) -> () + 833
    frame #6: 0x0000000122b1e030 iOSInjection`closure #1 (Swift.UnsafePointer<Swift.Optional<Swift.AnyObje

gpake

(lldb) bt
* thread #1, queue = 'com.apple.main-thread', stop reason = breakpoint 2.9
  * frame #0: 0x0000000124f06a23 eval112.dylib`DetailViewController.injected(self=<unavailable>) at DetailViewController.swift:17
    frame #1: 0x0000000124f06af4 eval112.dylib`@objc DetailViewController.injected() at DetailViewController.swift:0
    frame #2: 0x0000000122b20a34 iOSInjection`partial apply ObjC forwarder with unmangled suffix ".88" + 20
    frame #3: 0x0000000122b1a017 iOSInjection`closure #4 (Swift.AnyObject) -> () in static iOSInjection.SwiftInjection.inject(tmpfile: Swift.String) throws -> () + 727
    frame #4: 0x0000000122b1a1d1 iOSInjection`partial apply forwarder for closure #4 (Swift.AnyObject) -> () in static iOSInjection.SwiftInjection.inject(tmpfile: Swift.String) throws -> () + 17
    frame #5: 0x0000000122b1c731 iOSInjection`iOSInjection.SwiftSweeper.sweepInstance(Swift.AnyObject) -> () + 833
    frame #6: 0x0000000122b1bdc2 iOSInjection`iOSInjection.SwiftSweeper.sweepValue(Any) -> () + 2546
    f

gpake

// orogin swift protocol and calling
protocol aProtocol {
	func testFunc()
}
class aStruct: aProtocol {
	func testFunc() {} // override defualt implementation
}
class bStruct: aProtocol {
	func testFunc() {} // override defualt implementation
}