ddesai

PRE-CONDITION: 
* You already have "adb" tool available from the command line. 
* Details on the various usage of adb is here: http://developer.android.com/tools/help/adb.html#Enabling


1) Connect the android device to the laptop using USB 

2) Use the command below on your laptop to redirect the log to the file - say mylog.txt 
adb logcat >mylog.txt 

ddesai

* Download the ZIP from here: https://code.google.com/p/android-screen-monitor/
* unzip it and extract asm.jar
* move it to your favorite location -- say ~ddesai/
* connect the phone using USB
* run it "java -jar ~ddesai/asm.jar

and you will see the Android screen on your laptop (Mac!)

HowTos:
* You can select device by CTRL + D (or context menu)

ddesai

http://rypress.com/tutorials/objective-c/categories.html

ddesai

Multiple observers can register for the Notifications.. Similar to Broadcast/Receivers on Android

ddesai

One-to-One relation (unlike Notifications - observers)

ddesai

    dispatch_queue_t queue = dispatch_queue_create("com.paypal.dadesai.gcd", DISPATCH_QUEUE_SERIAL);
    
    __block int x = 5;
    dispatch_async(queue, ^{
        for(int i=0; i<10; i++) {
            //x = x+i;
            NSLog(@"Block 1: %d", x);
        }
    });
    

ddesai

Anonymous code block - which can be assigned to the variable. This code block can be passed as argument to another functions. 

https://developer.apple.com/library/ios/documentation/cocoa/Conceptual/Blocks/Articles/bxGettingStarted.html#//apple_ref/doc/uid/TP40007502-CH7-SW1 

ddesai

atomic //default
nonatomic
strong //default for objects
weak
retain
assign //default for premitives
unsafe_unretained
copy 
readonly

ddesai

1) UI - UIKit - developed in objectiveC - need for UI
Class names starts with "UI" - e.g. UILabel

2) Foundation - developed in objectiveC
Class names start with "NS" - e.g. NSString

3) CoreFoundation - developed in C
Class names (actually structures) start with "CF" - e.g. CFString

ddesai

@interface MyClass : NSObject
{
   int myInt;
   NSNumber *myNumber;
}

- (void) doSomething;
+ (void) doSomethingElseWith:(NSNumber*) a;