{"id":379,"date":"2016-05-15T04:37:02","date_gmt":"2016-05-15T04:37:02","guid":{"rendered":"http:\/\/blogs.softwareclue.com\/?p=379"},"modified":"2016-05-15T04:37:02","modified_gmt":"2016-05-15T04:37:02","slug":"ios%e5%bc%80%e5%8f%91%e7%bb%8f%e9%aa%8c%e6%80%bb%e7%bb%93%ef%bc%88%e4%b8%8a%ef%bc%89","status":"publish","type":"post","link":"http:\/\/blog.softwareclues.com\/zh\/ios%e5%bc%80%e5%8f%91%e7%bb%8f%e9%aa%8c%e6%80%bb%e7%bb%93%ef%bc%88%e4%b8%8a%ef%bc%89","title":{"rendered":"iOS\u5f00\u53d1\u7ecf\u9a8c\u603b\u7ed3\uff08\u4e0a\uff09"},"content":{"rendered":"

\u6765\u6e90\uff1a\u8774\u8776\u4e4b\u68a6\u5929\u4f7f<\/p>\n

\u94fe\u63a5\uff1ahttp:\/\/www.jianshu.com\/p\/d333cf6ae4b0<\/p><\/blockquote>\n

\u5728iOS\u5f00\u53d1\u4e2d\u7ecf\u5e38\u9700\u8981\u4f7f\u7528\u7684\u6216\u4e0d\u5e38\u7528\u7684\u77e5\u8bc6\u70b9\u7684\u603b\u7ed3\uff0c\u51e0\u5e74\u7684\u6536\u85cf\u548c\u79ef\u7d2f\uff08\u8e29\u8fc7\u7684\u5751\uff09\u3002<\/p>\n

\u4e00\u3001 iPhone Size<\/p>\n\n\n\n\n\n\n\n\n
\u624b\u673a\u578b\u53f7<\/th>\n\u5c4f\u5e55\u5c3a\u5bf8<\/th>\n<\/tr>\n<\/thead>\n
iPhone 4 4s<\/td>\n320 * 480<\/td>\n<\/tr>\n
iPhone 5 5s<\/td>\n320 * 568<\/td>\n<\/tr>\n
iPhone 6 6s<\/td>\n375 * 667<\/td>\n<\/tr>\n
iphone 6 plus 6s plus<\/td>\n414 * 736<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n

\u4e8c\u3001 \u7ed9navigation Bar \u8bbe\u7f6e title \u989c\u8272<\/p>\n

UIColor *<\/span>whiteColor<\/span> = <\/span>[<\/span>UIColor <\/span>whiteColor<\/span>];<\/span><\/p>\n

NSDictionary *<\/span>dic<\/span> = <\/span>[<\/span>NSDictionary <\/span>dictionaryWithObject<\/span>:<\/span>whiteColor <\/span>forKey<\/span>:<\/span>NSForegroundColorAttributeName<\/span>];<\/span><\/p>\n

[<\/span>self<\/span>.<\/span>navigationController<\/span>.<\/span>navigationBar <\/span>setTitleTextAttributes<\/span>:<\/span>dic<\/span>];<\/span><\/p><\/blockquote>\n

\u4e09\u3001 \u5982\u4f55\u628a\u4e00\u4e2aCGPoint\u5b58\u5165\u6570\u7ec4\u91cc<\/p>\n

CGPoint\u00a0\u00a0<\/span>itemSprite1position<\/span> = <\/span>CGPointMake<\/span>(<\/span>100<\/span>,<\/span> 200<\/span>);<\/span><\/p>\n

NSMutableArray *<\/span> array<\/span>\u00a0\u00a0= <\/span>[[<\/span>NSMutableArray <\/span>alloc<\/span>]<\/span> initWithObjects<\/span>:<\/span>NSStringFromCGPoint<\/span>(<\/span>itemSprite1position<\/span>),<\/span>nil<\/span>];<\/span><\/p>\n

\u00a0\u00a0\u00a0\u00a0<\/span>\/\/\u00a0\u00a0\u00a0\u00a0\u4ece\u6570\u7ec4\u4e2d\u53d6\u503c\u7684\u8fc7\u7a0b\u662f\u8fd9\u6837\u7684\uff1a\u00a0\u00a0 <\/span><\/p>\n

CGPoint <\/span>point<\/span> = <\/span>CGPointFromString<\/span>([<\/span>array<\/span> objectAtIndex<\/span>:<\/span>0<\/span>]);<\/span><\/p>\n

 <\/p>\n

NSLog<\/span>(@<\/span>“point is %@.”<\/span>,<\/span> NSStringFromCGPoint<\/span>(<\/span>point<\/span>));<\/span><\/p><\/blockquote>\n

\u8c22\u8c22@bigParis\u7684\u5efa\u8bae\uff0c\u53ef\u4ee5\u7528NSValue\u8fdb\u884c\u57fa\u7840\u6570\u636e\u7684\u4fdd\u5b58\uff0c\u7528\u8fd9\u4e2a\u65b9\u6cd5\u66f4\u52a0\u6e05\u6670\u660e\u786e\u3002<\/p>\n

CGPoint\u00a0\u00a0<\/span>itemSprite1position<\/span> = <\/span>CGPointMake<\/span>(<\/span>100<\/span>,<\/span> 200<\/span>);<\/span><\/p>\n

NSValue *<\/span>originValue<\/span> = <\/span>[<\/span>NSValue <\/span>valueWithCGPoint<\/span>:<\/span>itemSprite1position<\/span>];<\/span><\/p>\n

NSMutableArray *<\/span> array<\/span>\u00a0\u00a0= <\/span>[[<\/span>NSMutableArray <\/span>alloc<\/span>]<\/span> initWithObjects<\/span>:<\/span>originValue<\/span>,<\/span> nil<\/span>];<\/span><\/p>\n

\/\/\u00a0\u00a0\u00a0\u00a0\u4ece\u6570\u7ec4\u4e2d\u53d6\u503c\u7684\u8fc7\u7a0b\u662f\u8fd9\u6837\u7684\uff1a<\/p>\n

NSValue *<\/span>currentValue<\/span> = <\/span>[<\/span>array<\/span> objectAtIndex<\/span>:<\/span>0<\/span>];<\/span><\/p>\n

CGPoint <\/span>point<\/span> = <\/span>[<\/span>currentValue <\/span>CGPointValue<\/span>];<\/span><\/p>\n

 <\/p>\n

NSLog<\/span>(@<\/span>“point is %@.”<\/span>,<\/span> NSStringFromCGPoint<\/span>(<\/span>point<\/span>));<\/span><\/p><\/blockquote>\n

\u73b0\u5728Xcode7\u540eOC\u652f\u6301\u6cdb\u578b\u4e86\uff0c\u53ef\u4ee5\u7528NSMutableArray *array\u6765\u4fdd\u5b58\u3002<\/p>\n

\u56db\u3001 UIColor \u83b7\u53d6 RGB \u503c<\/p>\n

UIColor *<\/span>color<\/span> = <\/span>[<\/span>UIColor <\/span>colorWithRed<\/span>:<\/span>0.0<\/span> green<\/span>:<\/span>0.0<\/span> blue<\/span>:<\/span>1.0<\/span> alpha<\/span>:<\/span>1.0<\/span>];<\/span><\/p>\n

const<\/span> CGFloat *<\/span>components<\/span> = <\/span>CGColorGetComponents<\/span>(<\/span>color<\/span>.<\/span>CGColor<\/span>);<\/span><\/p>\n

NSLog<\/span>(@<\/span>“Red: %f”<\/span>,<\/span> components<\/span>[<\/span>0<\/span>]);<\/span><\/p>\n

NSLog<\/span>(@<\/span>“Green: %f”<\/span>,<\/span> components<\/span>[<\/span>1<\/span>]);<\/span><\/p>\n

NSLog<\/span>(@<\/span>“Blue: %f”<\/span>,<\/span> components<\/span>[<\/span>2<\/span>]);<\/span><\/p>\n

NSLog<\/span>(@<\/span>“Alpha: %f”<\/span>,<\/span> components<\/span>[<\/span>3<\/span>]);<\/span><\/p><\/blockquote>\n

\u4e94\u3001 \u4fee\u6539textField\u7684placeholder\u7684\u5b57\u4f53\u989c\u8272\u3001\u5927\u5c0f<\/p>\n

self<\/span>.<\/span>textField<\/span>.<\/span>placeholder<\/span> = <\/span>@<\/span>“username is in here!”<\/span>;<\/span><\/p>\n

[<\/span>self<\/span>.<\/span>textField <\/span>setValue<\/span>:<\/span>[<\/span>UIColor <\/span>redColor<\/span>]<\/span> forKeyPath<\/span>:<\/span>@<\/span>“_placeholderLabel.textColor”<\/span>];<\/span><\/p>\n

[<\/span>self<\/span>.<\/span>textField <\/span>setValue<\/span>:<\/span>[<\/span>UIFont <\/span>boldSystemFontOfSize<\/span>:<\/span>16<\/span>]<\/span> forKeyPath<\/span>:<\/span>@<\/span>“_placeholderLabel.font”<\/span>];<\/span><\/p><\/blockquote>\n

\u516d\u3001\u4e24\u70b9\u4e4b\u95f4\u7684\u8ddd\u79bb<\/p>\n

static<\/span> __inline__ CGFloat CGPointDistanceBetweenTwoPoints<\/span>(<\/span>CGPoint <\/span>point1<\/span>,<\/span> CGPoint <\/span>point2<\/span>)<\/span> {<\/span> CGFloat <\/span>dx<\/span> = <\/span>point2<\/span>.<\/span>x<\/span> – <\/span>point1<\/span>.<\/span>x<\/span>;<\/span> CGFloat <\/span>dy<\/span> = <\/span>point2<\/span>.<\/span>y<\/span> – <\/span>point1<\/span>.<\/span>y<\/span>;<\/span> return<\/span> sqrt<\/span>(<\/span>dx*<\/span>dx<\/span> + <\/span>dy*<\/span>dy<\/span>);}<\/span><\/p><\/blockquote>\n

\u4e03\u3001IOS\u5f00\u53d1\uff0d\u5173\u95ed\/\u6536\u8d77\u952e\u76d8\u65b9\u6cd5\u603b\u7ed3<\/p>\n

1\u3001\u70b9\u51fbReturn\u6309\u626d\u65f6\u6536\u8d77\u952e\u76d8<\/p>\n

– <\/span>(<\/span>BOOL<\/span>)<\/span>textFieldShouldReturn<\/span>:<\/span>(<\/span>UITextField *<\/span>)<\/span>textField<\/span><\/p>\n

{<\/p>\n

\u00a0\u00a0\u00a0\u00a0<\/span>return<\/span> [<\/span>textField <\/span>resignFirstResponder<\/span>];<\/span><\/p>\n

}<\/p><\/blockquote>\n

2\u3001\u70b9\u51fb\u80cc\u666fView\u6536\u8d77\u952e\u76d8\uff08\u4f60\u7684View\u5fc5\u987b\u662f\u7ee7\u627f\u4e8eUIControl\uff09<\/p>\n

[<\/span>self<\/span>.<\/span>view <\/span>endEditing<\/span>:<\/span>YES<\/span>];<\/span><\/p><\/blockquote>\n

3\u3001\u4f60\u53ef\u4ee5\u5728\u4efb\u4f55\u5730\u65b9\u52a0\u4e0a\u8fd9\u53e5\u8bdd\uff0c\u53ef\u4ee5\u7528\u6765\u7edf\u4e00\u6536\u8d77\u952e\u76d8<\/p>\n

[[[<\/span>UIApplication <\/span>sharedApplication<\/span>]<\/span> keyWindow<\/span>]<\/span> endEditing<\/span>:<\/span>YES<\/span>];<\/span><\/p><\/blockquote>\n

\u516b\u3001\u5728\u4f7f\u7528 ImagesQA.xcassets \u65f6\u9700\u8981\u6ce8\u610f<\/p>\n

\u5c06\u56fe\u7247\u76f4\u63a5\u62d6\u5165image\u5230ImagesQA.xcassets\u4e2d\u65f6\uff0c\u56fe\u7247\u7684\u540d\u5b57\u4f1a\u4fdd\u7559\u3002<\/p>\n

\u8fd9\u4e2a\u65f6\u5019\u5982\u679c\u56fe\u7247\u7684\u540d\u5b57\u8fc7\u957f\uff0c\u90a3\u4e48\u8fd9\u4e2a\u540d\u5b57\u4f1a\u5b58\u5165\u5230ImagesQA.xcassets\u4e2d\uff0c\u540d\u5b57\u8fc7\u957f\u4f1a\u5f15\u8d77SourceTree\u5224\u65ad\u5f02\u5e38\u3002<\/p>\n

\u4e5d\u3001UIPickerView \u5224\u65ad\u5f00\u59cb\u9009\u62e9\u5230\u9009\u62e9\u7ed3\u675f<\/p>\n

\u5f00\u59cb\u9009\u62e9\u7684\uff0c\u9700\u8981\u5728\u7ee7\u627fUiPickerView\uff0c\u521b\u5efa\u4e00\u4e2a\u5b50\u7c7b\uff0c\u5728\u5b50\u7c7b\u4e2d\u91cd\u8f7d<\/p>\n

– <\/span>(<\/span>UIView*<\/span>)<\/span>hitTest<\/span>:<\/span>(<\/span>CGPoint<\/span>)<\/span>point <\/span>withEvent<\/span>:<\/span>(<\/span>UIEvent*<\/span>)<\/span>event<\/span><\/p><\/blockquote>\n

\u5f53[super hitTest:point withEvent:event]\u8fd4\u56de\u4e0d\u662fnil\u7684\u65f6\u5019\uff0c\u8bf4\u660e\u662f\u70b9\u51fb\u4e2dUIPickerView\u4e2d\u4e86\u3002<\/p>\n

\u7ed3\u675f\u9009\u62e9\u7684\uff0c \u5b9e\u73b0UIPickerView\u7684delegate\u65b9\u6cd5<\/p>\n

– <\/span>(<\/span>void<\/span>)<\/span>pickerView<\/span>:<\/span>(<\/span>UIPickerView*<\/span>)<\/span>pickerView <\/span>didSelectRow<\/span>:<\/span>(<\/span>NSInteger<\/span>)<\/span>row <\/span>inComponent<\/span>:<\/span>(<\/span>NSInteger<\/span>)<\/span>component<\/span><\/p><\/blockquote>\n

\u5f53\u8c03\u7528\u8fd9\u4e2a\u65b9\u6cd5\u7684\u65f6\u5019\uff0c\u8bf4\u660e\u9009\u62e9\u5df2\u7ecf\u7ed3\u675f\u4e86\u3002<\/p>\n

\u5341\u3001iOS\u6a21\u62df\u5668 \u952e\u76d8\u4e8b\u4ef6<\/p>\n

\u5f53iOS\u6a21\u62df\u5668 \u9009\u62e9\u4e86Keybaord->Connect Hardware keyboard \u540e\uff0c\u4e0d\u5f39\u51fa\u952e\u76d8\u3002<\/p>\n

\n

\u5f53\u4ee3\u7801\u4e2d\u6dfb\u52a0\u4e86<\/p>\n

[[<\/span>NSNotificationCenter <\/span>defaultCenter<\/span>]<\/span> addObserver<\/span>:<\/span>self<\/span><\/p>\n

\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0 <\/span>selector<\/span>:<\/span>@<\/span>selector<\/span>(<\/span>keyboardWillHide<\/span>)<\/span><\/p>\n

\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0 <\/span>name<\/span>:<\/span>UIKeyboardWillHideNotification<\/span><\/p>\n

\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0 <\/span>object<\/span>:<\/span>nil<\/span>];<\/span><\/p><\/blockquote>\n

\u8fdb\u884c\u952e\u76d8\u4e8b\u4ef6\u7684\u83b7\u53d6\u3002\u90a3\u4e48\u5728\u6b64\u60c5\u666f\u4e0b\u5c06\u4e0d\u4f1a\u8c03\u7528- (void)keyboardWillHide.<\/p>\n

\u56e0\u4e3a\u6ca1\u6709\u952e\u76d8\u7684\u9690\u85cf\u548c\u663e\u793a\u3002<\/p>\n

\u5341\u4e00\u3001\u5728ios7\u4e0a\u4f7f\u7528size classes\u540e\u4e0a\u9762\u4e0b\u9762\u9ed1\u8272<\/p>\n

\u4f7f\u7528\u4e86size classes\u540e\uff0c\u5728ios7\u7684\u6a21\u62df\u5668\u4e0a\u51fa\u73b0\u4e86\u4e0a\u9762\u548c\u4e0b\u9762\u90e8\u5206\u7684\u9ed1\u8272<\/p>\n

\u53ef\u4ee5\u5728General->App Icons and Launch Images->Launch Images Source\u4e2d\u8bbe\u7f6eImages.xcassets\u6765\u89e3\u51b3\u3002<\/p>\n

<\/p>\n

\u5341\u4e8c\u3001\u8bbe\u7f6e\u4e0d\u540csize\u5728size classes<\/p>\n

Font\u4e2d\u8bbe\u7f6e\u4e0d\u540c\u7684size classes\u3002<\/p>\n

<\/p>\n

\u5341\u4e09\u3001\u7ebf\u7a0b\u4e2d\u66f4\u65b0 UILabel\u7684text<\/p>\n

[<\/span>self<\/span>.<\/span>label1 <\/span>performSelectorOnMainThread<\/span>:<\/span>@<\/span>selector<\/span>(<\/span>setText<\/span>:<\/span>)<\/span>\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0<\/span>withObject<\/span>:<\/span>textDisplay<\/span><\/p>\n

\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0 <\/span>waitUntilDone<\/span>:<\/span>YES<\/span>];<\/span><\/p><\/blockquote>\n

abel1 \u4e3aUILabel\uff0c\u5f53\u5728\u5b50\u7ebf\u7a0b\u4e2d\uff0c\u9700\u8981\u8fdb\u884ctext\u7684\u66f4\u65b0\u7684\u65f6\u5019\uff0c\u53ef\u4ee5\u4f7f\u7528\u8fd9\u4e2a\u65b9\u6cd5\u6765\u66f4\u65b0\u3002<\/p>\n

\u5176\u4ed6\u7684UIView \u4e5f\u90fd\u662f\u4e00\u6837\u7684\u3002<\/p>\n

\u5341\u56db\u3001\u4f7f\u7528UIScrollViewKeyboardDismissMode\u5b9e\u73b0\u4e86Message app\u7684\u884c\u4e3a<\/p>\n

\u50cfMessages app\u4e00\u6837\u5728\u6eda\u52a8\u7684\u65f6\u5019\u53ef\u4ee5\u8ba9\u952e\u76d8\u6d88\u5931\u662f\u4e00\u79cd\u975e\u5e38\u597d\u7684\u4f53\u9a8c\u3002\u7136\u800c\uff0c\u5c06\u8fd9\u79cd\u884c\u4e3a\u6574\u5408\u5230\u4f60\u7684app\u5f88\u96be\u3002\u5e78\u8fd0\u7684\u662f\uff0c\u82f9\u679c\u7ed9UIScrollView\u6dfb\u52a0\u4e86\u4e00\u4e2a\u5f88\u597d\u7528\u7684\u5c5e\u6027keyboardDismissMode\uff0c\u8fd9\u6837\u53ef\u4ee5\u65b9\u4fbf\u5f88\u591a\u3002<\/p>\n

\u73b0\u5728\u4ec5\u4ec5\u53ea\u9700\u8981\u5728Storyboard\u4e2d\u6539\u53d8\u4e00\u4e2a\u7b80\u5355\u7684\u5c5e\u6027\uff0c\u6216\u8005\u589e\u52a0\u4e00\u884c\u4ee3\u7801\uff0c\u4f60\u7684app\u53ef\u4ee5\u548c\u529e\u5230\u548cMessages app\u4e00\u6837\u7684\u4e8b\u60c5\u4e86\u3002<\/p>\n

\u8fd9\u4e2a\u5c5e\u6027\u4f7f\u7528\u4e86\u65b0\u7684UIScrollViewKeyboardDismissMode enum\u679a\u4e3e\u7c7b\u578b\u3002\u8fd9\u4e2aenum\u679a\u4e3e\u7c7b\u578b\u53ef\u80fd\u7684\u503c\u5982\u4e0b\uff1a<\/p>\n

typedef<\/span> NS_ENUM<\/span>(<\/span>NSInteger<\/span>,<\/span> UIScrollViewKeyboardDismissMode<\/span>)<\/span> {<\/span><\/p>\n

\u00a0\u00a0\u00a0\u00a0<\/span>UIScrollViewKeyboardDismissModeNone<\/span>,<\/span><\/p>\n

\u00a0\u00a0\u00a0\u00a0<\/span>UIScrollViewKeyboardDismissModeOnDrag<\/span>,<\/span>\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0<\/span>\/\/ dismisses the keyboard when a drag begins<\/span><\/p>\n

\u00a0\u00a0\u00a0\u00a0<\/span>UIScrollViewKeyboardDismissModeInteractive<\/span>,<\/span> \/\/ the keyboard follows the dragging touch off screen, and may be pulled upward again to cancel the dismiss<\/span><\/p>\n

}<\/span> NS_ENUM_AVAILABLE_IOS<\/span>(<\/span>7_0<\/span>);<\/span><\/p><\/blockquote>\n

\u4ee5\u4e0b\u662f\u8ba9\u952e\u76d8\u53ef\u4ee5\u5728\u6eda\u52a8\u7684\u65f6\u5019\u6d88\u5931\u9700\u8981\u8bbe\u7f6e\u7684\u5c5e\u6027\uff1a<\/p>\n

<\/p>\n

\u5341\u4e94\u3001\u62a5\u9519 \u201c_sqlite3_bind_blob\u201d, referenced from:<\/p>\n

\u5c06 sqlite3.dylib\u52a0\u8f7d\u5230framework<\/p>\n

\u5341\u516d\u3001ios7 statusbar \u6587\u5b57\u989c\u8272<\/p>\n

iOS7\u4e0a\uff0c\u9ed8\u8ba4status bar\u5b57\u4f53\u989c\u8272\u662f\u9ed1\u8272\u7684\uff0c\u8981\u4fee\u6539\u4e3a\u767d\u8272\u7684\u9700\u8981\u5728infoPlist\u91cc\u8bbe\u7f6eUIViewControllerBasedStatusBarAppearance\u4e3aNO\uff0c\u7136\u540e\u5728\u4ee3\u7801\u91cc\u6dfb\u52a0\uff1a<\/p>\n

[application setStatusBarStyle:UIStatusBarStyleLightContent];<\/p>\n

\u5341\u4e03\u3001\u83b7\u5f97\u5f53\u524d\u786c\u76d8\u7a7a\u95f4<\/p>\n

NSFileManager *<\/span>fm<\/span> = <\/span>[<\/span>NSFileManager <\/span>defaultManager<\/span>];<\/span><\/p>\n

\u00a0\u00a0\u00a0\u00a0<\/span>NSDictionary *<\/span>fattributes<\/span> = <\/span>[<\/span>fm <\/span>attributesOfFileSystemForPath<\/span>:<\/span>NSHomeDirectory<\/span>()<\/span> error<\/span>:<\/span>nil<\/span>];<\/span><\/p>\n

 <\/p>\n

\u00a0\u00a0\u00a0\u00a0<\/span>NSLog<\/span>(@<\/span>“\u5bb9\u91cf%lldG”<\/span>,[[<\/span>fattributes <\/span>objectForKey<\/span>:<\/span>NSFileSystemSize<\/span>]<\/span> longLongValue<\/span>]<\/span>\/<\/span>1000000000<\/span>);<\/span><\/p>\n

\u00a0\u00a0\u00a0\u00a0<\/span>NSLog<\/span>(@<\/span>“\u53ef\u7528%lldG”<\/span>,[[<\/span>fattributes <\/span>objectForKey<\/span>:<\/span>NSFileSystemFreeSize<\/span>]<\/span> longLongValue<\/span>]<\/span>\/<\/span>1000000000<\/span>);<\/span><\/p><\/blockquote>\n

\u5341\u516b\u3001\u7ed9UIView \u8bbe\u7f6e\u900f\u660e\u5ea6\uff0c\u4e0d\u5f71\u54cd\u5176\u4ed6sub views<\/p>\n

UIView\u8bbe\u7f6e\u4e86alpha\u503c\uff0c\u4f46\u5176\u4e2d\u7684\u5185\u5bb9\u4e5f\u8ddf\u7740\u53d8\u900f\u660e\u3002\u6709\u6ca1\u6709\u89e3\u51b3\u529e\u6cd5\uff1f<\/p>\n

\u8bbe\u7f6ebackground color\u7684\u989c\u8272\u4e2d\u7684\u900f\u660e\u5ea6<\/p>\n

\u6bd4\u5982\uff1a<\/p>\n

[<\/span>self<\/span>.<\/span>testView <\/span>setBackgroundColor<\/span>:<\/span>[<\/span>UIColor <\/span>colorWithRed<\/span>:<\/span>0.0<\/span> green<\/span>:<\/span>1.0<\/span> blue<\/span>:<\/span>1.0<\/span> alpha<\/span>:<\/span>0.5<\/span>]];<\/span><\/p><\/blockquote>\n

\u8bbe\u7f6e\u4e86color\u7684alpha\uff0c \u5c31\u53ef\u4ee5\u5b9e\u73b0\u80cc\u666f\u8272\u6709\u900f\u660e\u5ea6\uff0c\u5f53\u5176\u4ed6sub views\u4e0d\u53d7\u5f71\u54cd\u7ed9color \u6dfb\u52a0 alpha\uff0c\u6216\u4fee\u6539alpha\u7684\u503c\u3002<\/p>\n

\/\/ Returns a color in the same color space as the receiver with the specified alpha component.<\/p>\n

– <\/span>(<\/span>UIColor *<\/span>)<\/span>colorWithAlphaComponent<\/span>:<\/span>(<\/span>CGFloat<\/span>)<\/span>alpha<\/span>;<\/span><\/p>\n

\/\/ eg.<\/p>\n

[<\/span>view<\/span>.<\/span>backgroundColor <\/span>colorWithAlphaComponent<\/span>:<\/span>0.5<\/span>];<\/span><\/p><\/blockquote>\n

\u5341\u4e5d\u3001\u5c06color\u8f6c\u4e3aUIImage<\/p>\n

\/\/\u5c06color\u8f6c\u4e3aUIImage<\/p>\n

– <\/span>(<\/span>UIImage *<\/span>)<\/span>createImageWithColor<\/span>:<\/span>(<\/span>UIColor *<\/span>)<\/span>color<\/span><\/p>\n

{<\/p>\n

\u00a0\u00a0\u00a0\u00a0<\/span>CGRect <\/span>rect<\/span> = <\/span>CGRectMake<\/span>(<\/span>0.0f<\/span>,<\/span> 0.0f<\/span>,<\/span> 1.0f<\/span>,<\/span> 1.0f<\/span>);<\/span><\/p>\n

\u00a0\u00a0\u00a0\u00a0<\/span>UIGraphicsBeginImageContext<\/span>(<\/span>rect<\/span>.<\/span>size<\/span>);<\/span><\/p>\n

\u00a0\u00a0\u00a0\u00a0<\/span>CGContextRef <\/span>context<\/span> = <\/span>UIGraphicsGetCurrentContext<\/span>();<\/span><\/p>\n

\u00a0\u00a0\u00a0\u00a0<\/span>CGContextSetFillColorWithColor<\/span>(<\/span>context<\/span>,<\/span> [<\/span>color <\/span>CGColor<\/span>]);<\/span><\/p>\n

\u00a0\u00a0\u00a0\u00a0<\/span>CGContextFillRect<\/span>(<\/span>context<\/span>,<\/span> rect<\/span>);<\/span><\/p>\n

\u00a0\u00a0\u00a0\u00a0<\/span>UIImage *<\/span>theImage<\/span> = <\/span>UIGraphicsGetImageFromCurrentImageContext<\/span>();<\/span><\/p>\n

\u00a0\u00a0\u00a0\u00a0<\/span>UIGraphicsEndImageContext<\/span>();<\/span><\/p>\n

 <\/p>\n

\u00a0\u00a0\u00a0\u00a0<\/span>return<\/span> theImage<\/span>;<\/span><\/p>\n

}<\/p><\/blockquote>\n

\u4e8c\u5341\u3001NSTimer \u7528\u6cd5<\/p>\n

NSTimer *<\/span>timer<\/span> = <\/span>[<\/span>NSTimer <\/span>scheduledTimerWithTimeInterval<\/span>:<\/span>.<\/span>02<\/span> target<\/span>:<\/span>self <\/span>selector<\/span>:<\/span>@<\/span>selector<\/span>(<\/span>tick<\/span>:<\/span>)<\/span> userInfo<\/span>:<\/span>nil <\/span>repeats<\/span>:<\/span>YES<\/span>];<\/span><\/p>\n

 <\/p>\n

\u00a0\u00a0\u00a0\u00a0<\/span>[[<\/span>NSRunLoop <\/span>currentRunLoop<\/span>]<\/span> addTimer<\/span>:<\/span>timer <\/span>forMode<\/span>:<\/span>NSRunLoopCommonModes<\/span>];<\/span><\/p><\/blockquote>\n

\u5728NSRunLoop \u4e2d\u6dfb\u52a0\u5b9a\u65f6\u5668.<\/p>\n

\u4e8c\u5341\u4e00\u3001Bundle identifier \u5e94\u7528\u6807\u793a\u7b26<\/p>\n

Bundle identifier \u662f\u5e94\u7528\u7684\u6807\u793a\u7b26\uff0c\u8868\u660e\u5e94\u7528\u548c\u5176\u4ed6APP\u7684\u533a\u522b\u3002<\/p>\n

\u4e8c\u5341\u4e8c\u3001NSDate \u83b7\u53d6\u51e0\u5e74\u524d\u7684\u65f6\u95f4<\/p>\n

eg. \u83b7\u53d6\u523040\u5e74\u524d\u7684\u65e5\u671f<\/p>\n

NSCalendar *<\/span>gregorian<\/span> = <\/span>[[<\/span>NSCalendar <\/span>alloc<\/span>]<\/span> initWithCalendarIdentifier<\/span>:<\/span>NSGregorianCalendar<\/span>];<\/span><\/p>\n

NSDateComponents *<\/span>dateComponents<\/span> = <\/span>[[<\/span>NSDateComponents <\/span>alloc<\/span>]<\/span> init<\/span>];<\/span><\/p>\n

[<\/span>dateComponents <\/span>setYear<\/span>:-<\/span>40<\/span>];<\/span><\/p>\n

self<\/span>.<\/span>birthDate<\/span> = <\/span>[<\/span>gregorian <\/span>dateByAddingComponents<\/span>:<\/span>dateComponents <\/span>toDate<\/span>:<\/span>[<\/span>NSDate <\/span>date<\/span>]<\/span> options<\/span>:<\/span>0<\/span>];<\/span><\/p><\/blockquote>\n

\u4e8c\u5341\u4e09\u3001iOS\u52a0\u8f7d\u542f\u52a8\u56fe\u7684\u65f6\u5019\u9690\u85cfstatusbar<\/p>\n

\u53ea\u9700\u9700\u8981\u5728info.plist\u4e2d\u52a0\u5165Status bar is initially hidden \u8bbe\u7f6e\u4e3aYES\u5c31\u597d<\/p>\n

<\/p>\n

\u4e8c\u5341\u56db\u3001iOS \u5f00\u53d1\uff0c\u5de5\u7a0b\u4e2d\u6df7\u5408\u4f7f\u7528 ARC \u548c\u975eARC<\/p>\n

Xcode \u9879\u76ee\u4e2d\u6211\u4eec\u53ef\u4ee5\u4f7f\u7528 ARC \u548c\u975e ARC \u7684\u6df7\u5408\u6a21\u5f0f\u3002<\/p>\n

\u5982\u679c\u4f60\u7684\u9879\u76ee\u4f7f\u7528\u7684\u975e ARC \u6a21\u5f0f\uff0c\u5219\u4e3a ARC \u6a21\u5f0f\u7684\u4ee3\u7801\u6587\u4ef6\u52a0\u5165 -fobjc-arc \u6807\u7b7e\u3002<\/p>\n

\u5982\u679c\u4f60\u7684\u9879\u76ee\u4f7f\u7528\u7684\u662f ARC \u6a21\u5f0f\uff0c\u5219\u4e3a\u975e ARC \u6a21\u5f0f\u7684\u4ee3\u7801\u6587\u4ef6\u52a0\u5165 -fno-objc-arc \u6807\u7b7e\u3002<\/p>\n

\u6dfb\u52a0\u6807\u7b7e\u7684\u65b9\u6cd5\uff1a<\/p>\n