//需要在你的viewcontroller裡重寫幾個方法:
//開始觸控的方法
- (void
)touchesbegan:(nsset *)touches
withevent:(uievent *)event
//觸控取消的方法
- (void
)touchescancelled:(nsset *)touches
withevent:(uievent *)event
//觸控結束的方法
- (void
)touchesended:(nsset *)touches
withevent:(uievent *)event
//觸控移動的方法
- (void
)touchesmoved:(nsset *)touches
withevent:(uievent *)event
//觸控-清掃:
//開始觸控
- (void
)touchesbegan:(nsset *)touches
withevent:(uievent *)event
//kminimumgesturelength 最小移動長度 kmaximumvariance最大偏移長度
- (void
)touchesmoved:(nsset *)touches
withevent:(uievent *)event
else
if(deltay >= kminimumgesturelength &&
deltax <= kmaximumvariance)
} //多次輕擊判斷,比如雙擊,三擊等:
//單擊動作響應事件
- (void
)singletap
//雙擊
- (void
)doubletap
//三擊
- (void
)tripletap
//四擊
- (void
)quadrupletap
- (void
)eraseme:(uitextfield *)textfield
- (void
)touchesbegan:(nsset *)touches
withevent:(uievent *)event
} //[self performselector:@selector(eraseme:)withobject:singlelabel afterdelay:1.6f]中
//performselector:@selector(eraseme:)withobject:singlelabel afterdelay:1.6f方法為將來afterdelay1.6秒之後呼叫eraseme方法
//同樣的[nsobect cancelpreviousperformselector:withobject :afterdelay:];
//方法為取消這些將來的呼叫
//捏合操作:
- (void
)eraselabel
//開始觸碰
- (void
)touchesbegan:(nsset *)touches withevent:(uievent *)event
} //移動手指
- (void
)touchesmoved:(nsset *)touches
withevent:(uievent *)event
else
if(currentdistance - initialdistance > kminimumpinchdelta)
else
if(initialdistance - currentdistance > kminimumpinchdelta)
} } //觸碰結束
- (void
)touchesended:(nsset *)touches withevent:(uievent *)event
//自定義手勢「√」:
- (void
)eraselabel
- (void
)touchesbegan:(nsset *)touches withevent:(uievent *)event
- (void
)touchesmoved:(nsset *)touches withevent:(uievent *)event
//linelengthsofar,lastpreviouspoint,lastcurrentpoint重新賦值
linelengthsofar += distancebetweenpoints(previouspoint, currentpoint);
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);
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