来源: 互联网  发布时间: 2014-02-18

override的简单示例

overrideAppDelegate.h

 

#import <UIKit/UIKit.h>

@interface overrideAppDelegate : NSObject <UIApplicationDelegate> {
    UIWindow *window;
}

@property (nonatomic, retain) IBOutlet UIWindow *window;

@end

 

overrideAppDelegate.m

 

#import "overrideAppDelegate.h"
#import "NSString+Addition.h"

@implementation overrideAppDelegate

@synthesize window;

#pragma mark -
#pragma mark Application lifecycle

- (BOOL)application:(UIApplication *)application didFinishLaunchingWithOptions:(NSDictionary *)launchOptions {    
	[window makeKeyAndVisible];    
    if ([NSString swizze]) {
        NSString *s1 = @"Hello, everyone";
		char *s2 = (char *)[s1 UTF8String];
		NSLog(@"%s", s2);
    }    
    return YES;
}

#pragma mark -
#pragma mark Memory management

- (void)dealloc {
    [window release];
    [super dealloc];
}

@end

 

NSString+Addition.h

 

#import <Foundation/Foundation.h>

@interface NSString (NSString_Addition)

+ (BOOL)swizze;

@end

 

NSString+Addition.m

 

#import "NSString+Addition.h"
#import <objc/objc-class.h>

#define CSTRING_CUSTOM_ADDITON "^_^"

@implementation NSString (NSString_Addition)

- (const char *)ovUTF8String {
	char *sOriginal = (char *)[self ovUTF8String];
	int iOrgLen = (NULL == sOriginal ? 0 : strlen(sOriginal));
	char *sCustom = (char *)malloc(iOrgLen + strlen(CSTRING_CUSTOM_ADDITON) + 1);
    if (NULL != sCustom) {
        if (NULL != sOriginal) {
            strcpy(sCustom, sOriginal);
        } 
        strcat(sCustom, CSTRING_CUSTOM_ADDITON);
    }
	return (const char *)sCustom;
}

+ (BOOL)swizze {
    Method oldMethod = class_getInstanceMethod(self, NSSelectorFromString(@"UTF8String"));
    if (!oldMethod)
		return NO;
	Method newMethod = class_getInstanceMethod(self, NSSelectorFromString(@"ovUTF8String"));
	if (!newMethod)
		return NO;
	method_exchangeImplementations(oldMethod, newMethod);
	return YES;
}

@end

    

    来源: 互联网  发布时间: 2014-02-18

应用程序动态全屏和退出全屏
    让程序全屏的方法，大家都知道，那是静态的，程序运行之初就申明了。但是如果有这样的需求：要在程序运行的过程中，执行了某个操作而使之全屏，然后还需要退出全屏，怎么做？
    如下：

WindowManager.LayoutParams attrs = getWindow().getAttributes();  
attrs.flags |= WindowManager.LayoutParams.FLAG_FULLSCREEN;  
getWindow().setAttributes(attrs);  
getWindow().addFlags(WindowManager.LayoutParams.FLAG_LAYOUT_NO_LIMITS);  

    修改window的LayoutParams参数，然后加上FLAG_LAYOUT_NO_LIMITS标志，就OK了。window会自动重新布局，呈现全屏的状态。
    要退出全屏，只需要清除刚才加上的FLAG_FULLSCREEN参数，然后去掉FLAG_LAYOUT_NO_LIMITS标志。
    如下：

WindowManager.LayoutParams attrs = getWindow().getAttributes();  
attrs.flags &= (~WindowManager.LayoutParams.FLAG_FULLSCREEN);  
getWindow().setAttributes(attrs);  
getWindow().clearFlags(WindowManager.LayoutParams.FLAG_LAYOUT_NO_LIMITS);  

    

    来源: 互联网  发布时间: 2014-02-18

总结了一些经常涉及到的权限
http://topic.csdn.net/u/20101116/10/ecb5fde2-39dc-44d0-a901-eb8b70d845f5.html

访问网络的权限：
<uses-permission android:name="android.permission.INTERNET" ></uses-permission>

添加WiFi以及访问网络的权限：
  <uses-permission android:name="android.permission.CHANGE_NETWORK_STATE" ></uses-permission>
  <uses-permission android:name="android.permission.CHANGE_WIFI_STATE" ></uses-permission>
  <uses-permission android:name="android.permission.ACCESS_NETWORK_STATE" ></uses-permission>
  <uses-permission android:name="android.permission.ACCESS_WIFI_STATE" ></uses-permission>
  <uses-permission android:name="android.permission.INTERNET" ></uses-permission>
  <uses-permission android:name="android.permission.WAKE_LOCK" ></uses-permission>


操作外部存储设备文件：
  <uses-permission android:name="android.permission.WRITE_EXTERNAL_STORAGE" />


录音时需要的权限：
<uses-permission android:name="android.permission.RECORD_AUDIO"></uses-permission>
<uses-permission android:name="android.permission.WRITE_EXTERNAL_STORAGE"></uses-permission>


录制视频时需要的权限：
<uses-permission android:name="android.permission.CAMERA"></uses-permission>
<uses-permission android:name="android.permission.RECORD_AUDIO"></uses-permission>
<uses-permission android:name="android.permission.WRITE_EXTERNAL_STORAGE"></uses-permission>


发送短信：
<uses-permission android:name="android.permission.SEND_SMS" ></uses-permission>


收短信:
<uses-permission android:name="android.permission.RECEIVE_SMS" />


收彩信：
<uses-permission android:name="android.permission.READ_SMS" />


GPS:
<!-- 權限 : 上網連線 -->
<uses-permission android:name="android.permission.INTERNET"></uses-permission>
<!-- 權限 : GPS定位 -->
<uses-permission android:name="android.permission.ACCESS_MOCK_LOCATION"></uses-permission>
<uses-permission android:name="android.permission.ACCESS_LOCATION_EXTRA_COMMANDS"></uses-permission>
<uses-permission android:name="android.permission.ACCESS_FINE_LOCATION"></uses-permission>
<!-- 權限 : AGPS定位 -->
<uses-permission android:name="android.permission.ACCESS_COARSE_LOCATION"></uses-permission>