iPhone開發中touch的事件

在viewcontroller中重寫touch的事件的方法體就可實現特定的touch功能(但這些touch事件會被加在之上的tableview或scrollview等遮蔽,希望知道解決方案的留下方法).

下面**實現清掃事件

- (void)touchesbegan:(nsset *)touches withevent:(uievent *)event 

- (void)touchescancelled:(nsset *)touches withevent:(uievent *)event
- (void)touchesended:(nsset *)touches withevent:(uievent *)event 
- (void)touchesmoved:(nsset *)touches withevent:(uievent *)event

觸控－輕掃:

- (void)touchesbegan:(nsset *)touches withevent:(uievent *)event

- (void)touchesmoved:(nsset *)touches withevent:(uievent *)event

elseif (deltay >= kminimumgesturelength &&
deltax <= kmaximumvariance)    
}

多次輕擊判斷:

- (void)touchesbegan:(nsset *)touches withevent:(uievent *)event

}

捏合操作：

- (void)touchesbegan:(nsset *)touches withevent:(uievent *)event

}- (void)touchesmoved:(nsset *)touches withevent:(uievent *)event

elseif (initialdistance - currentdistance > kminimumpinchdelta)

}}- (void)touchesended:(nsset *)touches withevent:(uievent *)event

自定義手勢「√」：

- (void)touchesbegan:(nsset *)touches withevent:(uievent *)event

- (void)touchesmoved:(nsset *)touches withevent:(uievent *)event

linelengthsofar += distancebetweenpoints(previouspoint, currentpoint);//linelengthsofar , lastpreviouspoint, lastcurrentpoint 重新賦值

lastpreviouspoint = previouspoint;

lastcurrentpoint = currentpoint;

}這裡用到乙個判斷兩條直線的角度的方法 anglebetweenlines(cgpoint line1start, cgpoint line1end, cgpoint line2start, cgpointlin2end);

辦法是，繼承uiview，覆蓋touchesmoved方法：

- (void)touchesmoved:(nsset *)touches withevent:(uievent *)event

else

else } 

}

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