iOS实现一个可以在屏幕中*移动的按钮
程序员文章站
2023-12-19 13:41:04
本文主要给大家介绍了利用ios实现一个可以在屏幕中*移动的按钮的相关内容,分享出来供大家参考学习,下面话不多说,来一起看看详细的介绍。
效果图如下:
其实实现...
本文主要给大家介绍了利用ios实现一个可以在屏幕中*移动的按钮的相关内容,分享出来供大家参考学习,下面话不多说,来一起看看详细的介绍。
效果图如下:
其实实现很简单,只需要写.m就可以了
示例代码
#import "crossbtnvc.h"
@interface crossbtnvc () { cgpoint beginpoint; cgfloat rightmargin; cgfloat leftmargin; cgfloat topmargin; cgfloat bottommargin; cgmutablepathref pathref; } @property (nonatomic,strong) uibutton *crossbtn;//聊天移动 @end
@implementation crossbtnvc
- (void)viewdidload { [super viewdidload]; self.view.backgroundcolor = [uicolor whitecolor]; _crossbtn = [uibutton buttonwithtype:uibuttontypecustom]; [_crossbtn setimage:[uiimage imagenamed:@"移动聊天"] forstate:uicontrolstatenormal]; _crossbtn.frame = cgrectmake(ui_view_width-54*ui_width_scale, ui_view_height-103, 40, 40); [self.view addsubview:_crossbtn]; [_crossbtn addtarget:self action:@selector(btnaction:) forcontrolevents:uicontroleventtouchupinside]; uipangesturerecognizer *pan = [[uipangesturerecognizer alloc]initwithtarget:self action:@selector(handlepan:)]; [_crossbtn addgesturerecognizer:pan]; rightmargin = [uiscreen mainscreen].bounds.size.width-30; leftmargin = 30; bottommargin = [uiscreen mainscreen].bounds.size.height-30-50; topmargin = 30+64; pathref=cgpathcreatemutable(); cgpathmovetopoint(pathref, null, leftmargin, topmargin); cgpathaddlinetopoint(pathref, null, rightmargin, topmargin); cgpathaddlinetopoint(pathref, null, rightmargin, bottommargin); cgpathaddlinetopoint(pathref, null, leftmargin, bottommargin); cgpathaddlinetopoint(pathref, null, leftmargin, topmargin); cgpathclosesubpath(pathref); }
#pragma mark - 事件 - (void)btnaction:(uibutton*)sender{ }
#pragma mark - 手势 - (void)handlepan:(uipangesturerecognizer *)pan { if (pan.state == uigesturerecognizerstatebegan) { beginpoint = [pan locationinview:self.view]; }else if (pan.state == uigesturerecognizerstatechanged){ cgpoint nowpoint = [pan locationinview:self.view]; float offsetx = nowpoint.x - beginpoint.x; float offsety = nowpoint.y - beginpoint.y; cgpoint centerpoint = cgpointmake(beginpoint.x + offsetx, beginpoint.y + offsety); if (cgpathcontainspoint(pathref, null, centerpoint, no)) { _crossbtn.center = centerpoint; }else{ if (centerpoint.y>bottommargin) { if (centerpoint.x<rightmargin&¢erpoint.x>leftmargin) { _crossbtn.center = cgpointmake(beginpoint.x + offsetx, bottommargin); } } else if (centerpoint.y<topmargin) { if (centerpoint.x<rightmargin&¢erpoint.x>leftmargin) { _crossbtn.center = cgpointmake(beginpoint.x + offsetx, topmargin); } } else if (centerpoint.x>rightmargin) { _crossbtn.center = cgpointmake(rightmargin, beginpoint.y + offsety); } else if (centerpoint.x<leftmargin) { _crossbtn.center = cgpointmake(leftmargin, beginpoint.y + offsety); } } }else if (pan.state == uigesturerecognizerstateended || pan.state == uigesturerecognizerstatefailed){ } } @end
总结
以上就是这篇文章的全部内容了,希望本文的内容对各位ios开发者们能带来一定的帮助,如果有疑问大家可以留言交流,谢谢大家对的支持。