//載入原圖
uiimage *image = [uiimage imagenamed:@""];
//拉伸處理(說明需要保護的區域)
image = [image resizableimagewithcapinsets:uiedgeinsetsmake(30, 30, 30, 30) resizingmode:uiimageresizingmodestretch];
uibutton *btn;
//按鈕內邊距
btn.contentedgeinsets = uiedgeinsetsmake(10, 10, 10, 10);
btn.imageedgeinsets = uiedgeinsetsmake(20, 20, 20, 20);
btn.titleedgeinsets = uiedgeinsetsmake(30, 30, 30, 30);
uibutton的content中包含imageview、label。上面insets即對於每個view設定。
uitextfield *textfield;
uiview *leftview = [[uiview alloc]init];
leftview.frame = cgrectmake(0, 0, 10, 10);
textfield.leftview = leftview;
textfield.leftviewmode = uitextfieldviewmodealways;
//傳送通知
[[nsnotificationcenter defaultcenter]postnotification:note];
//接收通知
//接收到訊息之後的處理
-(void)receivenotification:(nsnotification *)note
uidevice通知
uideviceorientationdidchangenotification //裝置旋轉
uidevicebatterystatedidchangenotification//電池狀態改變
uidevicebatteryleveldidchangenotification//電池電量改變
uideviceproximitystatedidchangenotification//近距離感測器（如裝置貼近使用者臉部）
uikeyboarddidshownotification//鍵盤即將顯示
uikeyboardwillhidenotification//鍵盤即將隱藏
uikeyboardwillchangeframenotification//鍵盤frame改變
nslog(@"%@",note.userinfo);
//可以檢視到系統傳輸的note
, }";
uikeyboardcenterbeginuserinfokey = "nspoint: ";
uikeyboardcenterenduserinfokey = "nspoint: ";
uikeyboardframebeginuserinfokey = "nsrect: , }";
uikeyboardframeenduserinfokey = "nsrect: , }";
uikeyboardislocaluserinfokey = 1;
}
- (void)deallocself.view
.transform = cgaffinetransformidentity;
重新設定位置
//重新設定image位置
- (cgrect)imagerectforcontentrect:(cgrect)contentrect
//重新設定title位置
-(cgrect)titlerectforcontentrect:(cgrect)contentrect
- (void)layoutsubviews開發步驟
總結 如果想監聽別人一些行為，那麼你就要成為別人的**
[self
.tableview addobserver:self forkeypath:@"numberofsections" options:kniloptions context:nil];
//kvo監聽方法
- (void)observevalueforkeypath:(nsstring *)keypath ofobject:(id)object change:(nsdictionary
*)change context:(void *)context
//移除監聽
-(void)dealloc
uitextfield *field = [[uitextfield alloc]init];
//自定義鍵盤
field.inputview = [[uiview alloc]init];
- 存放一些公共巨集
- 存放公用標頭檔案
- 自定義log
//巨集裡面可變引數：...
//函式裡面可變引數：__va_args__
#define sdhlog(...) nslog(__va_args__)
#ifdef debug//除錯階段
#define sdhlog(...) nslog(__va_args__)
#else
#define sdhlog(...)
#endif
oc標頭檔案中
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